#java program to print the following pattern

[sahhunny]

Build a Mobile Video Chat Framework With Nex Gen Media Server (NGMS) API

Software giants, like Google are disrupting the otherwise safe and established players in the mobile application development business. Newcomers like Android have led to significant structural changes on the future of mobile application development by imposing their rules. This changed environment not only brings additional opportunities, but also adds certain constraints. Developers today, need to assess their options and find out how they can benefit from this changed environment.

While mobile computing has caught the attention of application developers, there has been very little work done to examine the programming ease of these technologies. Here we will take a look at two apkpure vip of the most widely available mobile development environments - Android and Windows Mobile and explore and assess these options from a developer's perspective.

Android

Android was released by Google in 2007, as an open source platform for mobile software development for smartphones. The Android platform was released as part of the Open Handset Alliance. The primary aim of this alliance was to set up open standards for smartphones. Android is basically a Linux based, open source operating system for mobiles. As a mobile operating system it allows developers to create managed codes in Java, by using Java libraries developed by Google. Not only does Android provide a mobile operating system including a development environment, it also offers a custom virtual machine known as the Dalvik Virtual Machine for running applications as well as acts as the middleware in between the operating system and the code. When it comes to application development, Android facilitates the usage of 2D as well as 3D graphic libraries, advanced network capabilities such as 3G, Edge and WLAN and a customized SQL engine for continual storage.

Windows Mobile

Developed by Microsoft, the Window Mobile is an operating system for mobile devices. Based on the Microsoft Windows CE 5.0, Windows Mobile is used as an operating system on many smartphones, PDAs and touch screen devices. Windows Mobile facilitates the creation of custom written applications in managed as well as native codes. The Application Programming Interface (API) in Windows Mobile is extensible and has rich features along with a programmable layer. Besides that Windows Mobile also takes advantage of the capabilities provided by Microsoft.Net environment.

We will compare these platforms and closely examine their strengths and weaknesses. The platforms will be compared on the basis of implementation and performance aspects as well as developer support. We have chosen these criteria for the comparison as they represent the most important aspects when it comes to mobile software developers.

Implementation

We will use persistent storage as the basis for comparing the implementation aspect. The technology used for persistent storage in mobile technology varies between various mobile development environments. Both Windows Mobile and Android have the ability to use an on-device database which facilitates easier manipulation as well as extraction of data. Also, as far as local file storage is concerned both environments support memory cards for additional storage space. However, the difference lies in the way the storage space is exploited. While Android cannot install applications on memory cards, Windows Mobile allows it. Both Android and Windows Mobile platforms have a relational database. Also, in both the platforms the libraries have quite a few useful persistence features. Once the libraries have been initialized, access to database is available via an object oriented interface which can be easily accessed by developers.

Performance

Performance figures are important for both users as well as developers. The performance comparison of the two platforms will be carried out based on the file size. The basic purpose of measuring file size is to get a better idea of the configuration as well as the run time dependencies that are included in packaged applications.

Android applications come packaged in apk (Android Package) files. The .APK file generally has a group of .DEX (Android program files) files, which operate like a single application file for usage within the Android platform. The .APK file is basically the compressed version of the contents in the 'Androidmanifest.xml' file.

Windows Mobile applications make use of cab-files for application packaging and deployment. The first step while making a distributable file, involves packaging the application in a CAB (Cabinet) file. This CAB file can be deployed to other devices where it can be expanded and installed. A CAB file is basically an executable archive which contains the application, resources, dependencies like DLLs and other resource files.

A comparative study of mobile development environments was conducted by Tom Morten Gronli, Jarle Hansen and Gheorghita Ghinea, of Brunel University, London. In this comparative study, a demo example application was created in both the Windows Mobile and Android development platforms to better illustrate the deployment file size for each application. The demo example application was a simple program which printed a line of text on the screen. The result from the code example was as follows:

The deployment size of the demo application in the Windows Mobile environment was 2.8 KB.

The deployment size of the demo application in the Android environment was 9.3 KB.

The file sizes as denoted were without any obfuscator or shrinker software. This is the type of file that an end user would either download or get shipped and then installed on his/her device. As can be seen from above, the demo application in Windows Mobile had a file size of 2.8 KB while Android was approximately three times the size at 9.3 KB. This serves as an indication of the total amount of configuration files and runtime dependencies which must be bundled along with each of the client applications. When it comes to the number of lines of code, Windows Mobile required only 11 lines whereas Android needed 28.

Developer Support Comparison

Developer support is a highly important aspect when it comes to gaining speed as well as quality during the development process. While both mobile development platforms do have similarities, there are some unique differences in developer support. The differences become clearer when we take the integrated developer environment (IDE) and the tooling into consideration.

The only choice for development in Windows Mobile is Visual Studio, which is again developed by Microsoft. With Visual Studio, Windows Mobile needs Microsoft backing before it can implement and ship new features in the IDE. The community can only make suggestions but doesn't have any direct influence. However, there is a positive side as consistency is assured. Also, the quality approval process implemented by Microsoft while shipping new products will assure quality.

On the other hand, there are several tooling options for Android, with quite a few IDEs. Android has open source communities who contribute to IDE development by providing as well as assuring quality of plugin functionalities for software. However, the multiple IDE environment can be quite a challenge for maintaining consistency and quality assurance. Consistency becomes a challenge as extension features may be available for only some of the competing IDEs. Quality assurance becomes a major challenge as development carried out by the community is not governed by a common standard for quality required prior to making the new integrated developer environment feature available. Quality assurance of the delivered code is essential for delivering fully functional products. These two factors can potentially make code and application portability between environments impossible.

One of the differences between the Android and the Windows Mobile development platforms as far as developer support and quality assurance is concerned becomes more apparent in the testing environment. Let us take a closer look at this during unit testing of both development platforms.

Unit testing is basically a quality assurance and validation tool for testing small parts of a computer or mobile applications. The aim is to have each section isolated and tested separately. This will help to isolate and assure the quality of the different units of the application.

Unit testing for Android is considerably straightforward as the API uses the JUnit test framework. The JUnit framework enforces hierarchical organization of the various test units which is a major advantage. Besides that, the JUnit pattern ensures independence of the test units as well as minimizes interference. This is done by first creating and then destroying the recently created test environment, before and after each test method is run. Android even takes JUnit a step further by allowing on device testing of the code. Here the test libraries are incorporated as part of the Android's standard libraries.

However, there's one challenge with Android's on device testing as compared to Windows Mobile is the results' readability. Android's on device tests don't have a user interface which can display the test's results. In order to view results of the test, a handler which deals with callbacks from Android's test runner has to be implemented.

Windows Mobile on the other hand exhibits a high degree of readability and visibility, while the Android platform is a bit hard to use when it comes to efficiency. The difficulty with Android is the lack of feedback, which is issued automatically through visual tools in the integrated development environment in Windows Mobile.

Windows Mobile implements a version of the xUnit framework. The code for test classes is kept in a separate project, though it still stays inside one solution in the IDE. Like Android, Windows Mobile's xUnit testing also allows on device testing. The biggest difference here, as mentioned earlier, is its test feedback. Windows Mobile has a more comprehensive user interface which offers feedback based on each test run. This makes it easier for developers to better understand which test succeeded and why a particular test failed.

Debugging support is also important for application development as it is a real time step by step code execution, which can help find and fix bugs. The debugging process will be dependent on the integrated development environment to perform its task. Both Windows Mobile and Android platforms support step by step debugging. Besides that, both platforms also include an on device debugging feature that lets an application run on a mobile device while debugging runs in the IDE.

[twincestisbest]

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[supersecure-blog]

Something awesome: progress update

Feeling sleepy...

From the time of my last blogpost, till now (11:15pm) I’ve been working on writing the first chapter of my how-to-guide which mainly covers an introduction to programming for beginner students. I’ve also included the writeups to picoCTF challenges which I have previously completed for the appropriate module

I’ve written about 1.5k words, which for those who are interested can be read below. 

Before we begin…

Introduction to programming

A key skill to learn before we dive head-first into the other concepts covered in this guide, we should probably first learn about our environment!

For those who think ‘airport’ when they hear the word terminal or ‘snail’ when they hear the word shell, you should definitely read this part before getting started with any of the other modules. For those who are already quite confident with navigating their way through the Linux environment, feel free to skip ahead!

Let’s start with a quick summary of some of the key things you should know:

What is a terminal?

The terminal is the main way that we, as users, interact with the computer. It normally looks like a black screen with white font. To uss the terminal, you type in specific commands which the computer interprets in order to run certain operations. 

Of course, in order to use the terminal you have to know the commands!

Some basic terminal commands:

I like to compare using the terminal like using a normal file explorer. We double-click 

folders (also called directories) to enter them, and double-clicking files opens them. We can create new folders, new files by right-clicking then pressing the appropriate button. All of this can be done through the terminal - you just have to know the right commands.

cd - stands for ‘change directory’. This command is used like ‘cd <name-of-directory>’ in order to change into the specified directory

If you just type in cd or ‘cd ~’ you should change to your home directory

You can use ‘cd ..’ to change into the previous directory you were in

pwd - stands for ‘print working directory’

ls - used to list all the files in your current directory. 

mkdir - stands for ‘make directory’. Basically is the equivalent of the ‘new folder’ button in a normal file explorer. You can use it like ‘mkdir <name-of-directory>’ to make a folder with the specified name.

./ - this little ‘./’ is very powerful! If we have executable files or files that we can’t normally open, we can run them by doing ‘./<name-of-executable>’ 

man - stands for ‘manual’. Think about this as your help guide for any command you want to learn more about. Use it by typing in ‘man <name-of-command>’.

Other useful commands:

rm - stands for ‘remove’. Used like ‘rm <name-of-file-to-be-removed>’

whoami - displays information about the user

cat - one of cat’s applications is to view the contents of a file without actually having to open it. Use it like ‘cat <name-of-file>’ to have the contents of the specified file be displayed in the terminal

strings - strings basically finds printable strings or sentences in an object, or other binary files. Use it like ‘strings <name-of-file>’.

grep - grep is a way for us to find the existence of certain patterns or words in a file. You can use it like ‘grep <word/pattern> <name-of-file>’ to return every instance of the word/pattern in the specified file

nc - nc or netcat is a tool that can help you read or write data over the internet. It has a lot of uses, but for the context of picoCTF we’ll mainly be using to access the challenges. Use it like ‘nc <destination> <port>’. An example of how we could use it for picoCTF is detailed below

ssh - basically a way for us to safely access remote servers. Use it like ‘ssh <user>@<host>’, where <user> refers to the account you want to access and <host> is the domain or IP address of the computer you are trying to access.

You can find more info about SSH here: https://www.hostinger.com/tutorials/ssh-tutorial-how-does-ssh-work

A more comprehensive guide containing explanations about a wider variety of commands can be found here.

What is a programming language?

So sure, we’ve learnt how to make our way through a terminal, but what about code? How do we write and run it? In terms of writing code, there are many varied programming languages, each with their own rules and different features that we can use. For readers who’ve never coded before in their life, now would be a fantastic time to learn one!

A lot of the concepts are common in programming languages, so it doesn’t particularly matter which one you start with. However, I would definitely recommend Python, as it is quite user-friendly. This is a great place to start learning.

What is a text editor?

To summarise quickly, basically we write programs saved in a certain type of file based on what language they are written. These files can be changed and edited using what are called text editors. There are many different ones- some are inherent to your terminal like ‘vim’ or ‘nano’ and are quite simplistic. Others you can download online and include cool features like autocompleting variable names and structuring your code for you.

Whatever text editor you choose to use is completely based on your preferences! Use whatever is comfortable for you and supports your writing of code

How do we run code?

Now that you’ve written your first program in a text editor, in your chosen programming language what do we actually do with it? Some programming languages like C or Java need to have their files be ‘compiled’ before we can actually run them. This basically means translating the code we write into a form that the computer can interpret. Other languages like Python don’t require this extra step, and can be run easily.

picoCTF writeups - Hideout:

This chapter’s challenges can all be found under the ‘hideout’ module in the 2018 picoCTF. The below examples detail some of the ways we can apply what has been described above.

net cat 

Using netcat (nc) will be a necessity throughout your adventure. Can you connect to 2018shell.picoctf.com at port 49387 to get the flag?

As we described above, we can use nc like ‘nc <destination> <port>’. Hence, we simply do ‘nc 2018shell.pico.ctf.com 49387’ to connect to the remote service. The flag should be displayed on your terminal which is: picoCTF{NEtcat_iS_a_NEcESSiTy_8b6a1fbc}

grep 1

Can you find the flag in file [1] ? This would be really obnoxious to look through by hand, see if you can find a faster way. You can also find the file in /problems/grep-1_4_0431431e36a950543a85426d0299343e on the shell server.

Although you could just look the whole file to manually find the flag, we can use one of the handy commands we learnt about earlier! As described in the above guide, we can use grep like ‘grep <word/pattern> <name-of-file>’. We can utilise the fact that every flag inpicoCTF is formatted in the same way, by doing ‘grep picoCTF file’ to retrieve our flag which is: picoCTF{grep_and_you_will_find_cdf2e7c2}

sshkeyz

As nice as it is to use our webshell, sometimes its helpful to connect directly to our machine. To do so, please add your own public key to ~/.ssh/authorized_keys, using the webshell. The flag is in the ssh banner which will be displayed when you login remotely with ssh to  with your username.

You can connect to the picoCTF server by doing ‘ssh <username>@2018shell1.picoctf.com’ in your terminal. The output should look somewhat similar to below:

$ ssh jeremyyf@2018shell1.picoctf.com

The authenticity of host '2018shell1.picoctf.com (18.223.208.176)' can't be established.

ECDSA key fingerprint is SHA256:zCX5ip3tx1RMbsJBc70jEazd+gAFzlbC1Q2iDI8LA/k.

Are you sure you want to continue connecting (yes/no)? yes

Warning: Permanently added '2018shell1.picoctf.com,18.223.208.176' (ECDSA) to the list of known hosts.

picoCTF{who_n33ds_p4ssw0rds_38dj21}

Thus we can see our flag, which is: picoCTF{who_n33ds_p4ssw0rds_38dj21}

strings 

Can you find the flag in this file [1]  without actually running it? You can also find the file in /problems/strings_0_bf57524acf558aca2081eb97ece8e2ee on the shell server.

As we detailed above, we can use string like ‘strings <name-of-file>’. To get all the printable lines in the ‘strings’ file we can use the strings command, together with grep to get the flag! By doing ‘strings strings | grep picoCTF’ we retrieve our flag which is: picoCTF{sTrIngS_sAVeS_Time_3f712a28}

what base is this

To be successful on your mission, you must be able to read data represented in different ways, such as hexadecimal or binary. Can you get the flag from this program to prove you are ready? Connect with nc 2018shell.picoctf.com 15853.

Basically this challenge wants us to convert between different bases of numbers. It requires you to:

Convert from binary to ASCII

Convert from hex to ASCII

Convert from octal to ASCII

I used the following tools to complete the challenge:

https://www.rapidtables.com/convert/number/binary-to-ascii.html

https://www.rapidtables.com/convert/number/ascii-hex-bin-dec-converter.html

http://www.unit-conversion.info/texttools/octal/

[mainsminder]

Test regex

Static Pattern compile(String regex, int flags)Ĭompiles given regex using specified flags and returns pattern. Returns compiled representation of the regex. The following table shows the methods provided by the Pattern class that is commonly used. Pattern class defines the pattern for the regex engine which can then be used to match with the input string. ReplaceAll method:She sells sea pearls on the sea shore with pearls Regex Pattern Class In Java ReplaceFirst method:She sells sea pearls on the sea shore with shells Input string: She sells sea shells on the sea shore with shells InputString = matcher.replaceAll("pearls") use replaceAll method to replace all occurrences of pattern (" replaceFirst method:" + inputString) InputString = matcher.replaceFirst("pearls") Matcher matcher = pattern.matcher(inputString) String inputString = "She sells sea shells on the sea shore with shells" Let’s see an example of the usage of some of these methods. Regular Expression Implementation Example Return the string representation of the current matcher. Replace the first matching subsequence of the input sequence by the specified replacement string. Replace all subsequences of the input sequence that match the pattern by given replacement string. Return the total number of matched subsequence. Returns end position/index of matched subsequence. Gives the starting index of matched subsequence and returns it. This is captured in the earlier match operation by capturing the group with the specified name. Returns the subsequence matching the pattern. Same as find () but finds the expression to be matched from the given start position. This method finds the next expression to be matched to the pattern. Returns the pattern that the matcher interprets. It has more methods but we have listed only the important methods below. Given below are the common methods of the Matcher class. Matcher acts as a regex engine and is used to perform the exact matching of a character sequence. The matcher class implements the MatchResult interface. Pattern found from 15 to 19 Regex Matcher In Java ("Pattern found from position " + m.start() + print the start and end position of the pattern found The output prints the start and end position in the string where the pattern is found. In the below program we have a simple string as a pattern and then we match it to a string. Let’s implement a simple example of regex in Java. MatchResult Interface: The MatchResult interface determines the regex pattern matching result. An object of type PatternSynta圎xception returns an unchecked exception indicating a syntax error in regex pattern. PatternSynta圎xception: This class defines an unchecked exception. It provides the matcher () method that returns a Matcher object. Like Pattern class, this class also does not provide any public constructors. Matcher Class: The Matcher class object matches the regex pattern to the string. The Pattern class does not have any public constructors but it provides static compile () methods that return Pattern objects and can be used to create a pattern. Pattern Class: A pattern class represents the compiled regex. The package provides one interface and three classes as shown below: But we can work with regular expressions by importing the “ ” package. Java language does not provide any built-in class for regex. Thus after finding the first match aba, the third character ‘a’ was not reused. Thus once a source character is used in a match, we cannot reuse it. Applying the regex from left to right, the regex will match the string “ aba_aba_”, at two places. So now we have to apply this regex to the string. Let’s assume that a regex ‘aba’ is defined. What we do is we apply the pattern to the text in a ‘left to right’ direction and the source string is matched with the pattern.įor example, consider a string “ ababababab”. When we analyze and alter the text using a regex, we say that ‘we have applied regex to the string or text’. Now given a pattern to search for, how exactly does the regex works? Hence, we always require regex to facilitate searching for the pattern. So in a computer application, we may have a continuous requirement of manipulating various patterns. Why do we search for a pattern in a string? We might want to find a particular pattern in a string and then manipulate it or edit it. Regular Expression Implementation ExampleĪ regular expression is mainly used to search for a pattern in a string.

[myprogrammingsolver]

Loop Statements Solution

1. Write a Java program by using three for loops to print the following pattern: 1****** 12***** 123**** 1234*** 12345** 123456* 1234567 2.CheckOddEven (if-else): Write a program called CheckOddEven which prints “Odd Number” if the int variable “number” is odd, or “Even Number” otherwise. The program shall always print “BYE!” before exiting. 3.PrintNumberInWord (nested-if, switch-case): Write a…

[programmingsolver]

Loop Statements Solution

1. Write a Java program by using three for loops to print the following pattern: 1****** 12***** 123**** 1234*** 12345** 123456* 1234567 2.CheckOddEven (if-else): Write a program called CheckOddEven which prints “Odd Number” if the int variable “number” is odd, or “Even Number” otherwise. The program shall always print “BYE!” before exiting. 3.PrintNumberInWord (nested-if, switch-case): Write a…

[bannerblog147]

Adobe Cs3 New

Windows

New Security for Android: the return of a lost or stolen phone, privacy protection, blocking unwanted calls / SMS-messages. Adobe Photoshop CS3 Extended Full. In This video I am going to show ' How to Change or Remove Picture or Photo or Image Background In Adobe Photoshop 7.0. ' Full describe.☞background:- https. I stopped the installation, uninstalled the software using Revo Uninstaller Pro, and deleted the old Adobe PCD folder from Program Files (x86)/Common Files/Adobe/. Then I restarted the installation and deselected Acrobat from the list of programs to install. Installation succeeded. I opened up a CS3 program and entered the new serial number.

Intel Pentium 4, Intel Centrino, Intel Xeon, Intel Core Duo (or compatible) processor

Microsoft Windows XP with Service Pack 2, Windows Vista Home Premium, Business, Enterprise, or Ultimate (certified for 32-bit editions)

1GB of RAM or more recommended

4GB of available hard-disk space (additional free space required during installation)

1,024x768 minimum monitor resolution with 16-bit or greater video card

DVD-ROM drive

QuickTime 7.1.2 software required for multimedia features

Internet or phone connection required for product activation

Broadband Internet connection required for Adobe Stock Photos* and other services

Adobe Cs3 Windows

Mac OS

PowerPC G4 or G5 or multicore Intel processor

Mac OS X v.10.4.8, Java Runtime Environment 1.5 required for Version Cue Server

1GB of RAM or more recommended

5.3GB of available hard-disk space (additional free space required during installation)

1,024x768 minimum monitor resolution with 16-bit or greater video card

DVD-ROM drive

QuickTime 7.1.2 software required for multimedia features

Internet or phone connection required for product activation

Broadband Internet connection required for Adobe Stock Photos* and other services

* Online services, including, but not limited to, Adobe Stock Photos and Adobe Connect, may not be available in all countries, languages, and currencies. Availability of services is subject to change. Use of online services is governed by terms and conditions of a separate agreement and may be subject to additional fees. For details, visit www.adobe.com.

How To Activate Adobe Cs3

Open the New Document Profile file you want to customize in the New Document Profiles folder located in the below directories.

Windows: Documents and Settings(User)Application DataAdobeAdobe Illustrator CS3 Settings.

Mac OS: Users(User)LibraryApplication SupportAdobeAdobe Illustrator CS3

Delete any existing swatches, graphic styles, brushes, or symbols you dont want to retain.

Do any of the following:

Create any colors, patterns, and gradients you want, and save them as swatches. You can also import swatches using the Swatch Libraries command and then move the swatches you want in the Document Profile file into the default Swatches panel.

Save any graph designs that you want available in your files using the Graph Design dialog box.

Create any graphic styles you want and save them to the Graphic Styles panel.

Create any brushes you want and save them to the Brushes panel.

Create any symbols you want and save them to the Symbols panel.

Select the options you want as default settings from the following: View preferences (from the View menu), ruler origins, page origins, print settings (in the Print dialog box, File > Print), and actions.

Save the Document Profile file and restart Illustrator.

[workschoolusa-blog]

The 30 Most Popular Online Courses of 2021

This yr may additionally were a nightmare in maximum ways, however 2021 has been a banner 12 months for online schooling. Besides millions of students round the sector being compelled to examine remotely, huge numbers of adults have observed themselves stuck at domestic with time on their palms. No wonder online courses have been so famous this yr.

Class Central, a clearinghouse for facts on online courses, noticed site visitors double because the pandemic began. Which lessons are these kinds of new students flocking to?

Class Central simply released a roundup of the most famous publications of the 12 months. As you’d assume, the complete list of one hundred consists of plenty of Covid-19 related publications on subjects like touch tracing and moving instructions on line (as well as perennial favorites like check prep and English as a second language). But it also contained some gem stones well proper to marketers and different specialists looking to amplify their capabilities and enhance their lives in 2022:

How to Learn Online from edX. “Learn essential techniques for successful on line gaining knowledge of.”

Excel/VBA for Creative Problem Solving, Part 1 from University of Colorado Boulder. This direction is “aimed toward newcomers who’re searching for to augment, expand, optimize, and boom the efficiency in their Excel spreadsheet abilities with the aid of tapping into the powerful programming, automation, and customization abilities to be had with Visual Basic for Applications (VBA),” explains the direction description.

Crash Course on Python from Google. “This course is designed to teach you the principles with a view to write simple programs in Python the usage of the most common structures.”

Finding Purpose and Meaning In Life: Living for What Matters Most from University of Michigan. The direction name quite an awful lot says the entirety you need to realize.

Everyday Excel, Part 1 University of Colorado Boulder. A more basic Excel elegance for “newcomers who’re seeking to research Excel from the floor up.”

Exercising Leadership: Foundational Principles from Harvard University. “Mobilize humans to address difficult issues and build the potential to thrive via the dangers of trade.”

Introduction to Business Management from King’s College London. “Discover how to control humans, money and data, and advantage confidence and insight into your very own control fashion.”

Computer Programming for Everyone from University of Leeds. “Discover the art of pc programming and examine what code can do.”

Data Analytics for Decision Making: An Introduction to Using Excel Bond University. Another possibility to come to be an Excel grasp. “It’s no longer sufficient to acquire records; to stand out you have to recognize the way to use data to enhance actual-existence decisions,” insists the route description.

AI for Everyone: Master the Basics from IBM. “Learn what Artificial Intelligence (AI) is by way of understanding its packages and key ideas inclusive of system learning, deep gaining knowledge of and neural networks.”

Introduction to Social Media Marketing from Facebook. “This path lays the inspiration of social media advertising.”

Introduction to Data Science from IBM. “Learn approximately the arena of data technological know-how first-hand from actual statistics scientists.”

Learn to Code for the Web from University of Leeds. “Ever wondered what’s at the back of your favorite web sites and apps? Get to grips with the fundamentals of coding in HTML, CSS and Java Script.”

Understanding Medical Research: Your Facebook Friend is Wrong from Yale University. A timely one which answers an crucial query: “How are you able to inform if the formidable headlines visible on social media are simply touting the following large issue or if the thing isn’t worth the paper it’s printed on?”

Write Your First Novel from Michigan State University. In case you want to unharness your inner author in 2021.

Project Management: Beyond the Basics The Open University. “Build your present undertaking management information and expand the competencies to manage teams and deliver effective initiatives.”

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Everfi Answer Guide

Everfi Answer Key Module 4

Everfi Answer Key Module 2

Eenie meenie sicileeny lyrics. Everfi Troubleshooting Guide Author: Health Promotion, Student Life - University at Buffalo Subject: Information to help students resolve technical issues with the online alcohol and sexual assault prevention courses Keywords: sdfasf Created Date: 2022Z.

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Everfi Answer Key Module 4

Search result: Everfi Savings Module 2 Answers

Which of the following statements about credit scores is TRUE? Credit scores reflect how likely individuals are to repay their debts. Each person has three credit scores. All of the above. Which of the following correctly pairs a financing option..

https://ccstem.org/view/Everfi_Savings_Module_2_Answers

Establish monetary policy Pass monetary laws Collect taxes Print money 2 Which type of account will typically have the highest interest rate? The down payment. The interest rate. The lender. The total cost of the home. All of the following..

https://ccstem.org/view/Everfi.Savings.Module.2.Answers

The amount owned for borrowing money. Which of the following actions would enable him to earn MORE interest? Which compounding frequency will earn you the MOST money? Compounding daily. Which of the following is a type of savings vehicle? Certificate of Deposit Which of the following is generally true about savings vehicles? People should evaluate different forms of savings vehicles based on their needs.

Certificate of Deposit CD Purpose of a budget is to: Help plan how you will spend the money you earn or receive. Put aside money for savings each month. Establishing the federal budget 13 Which of the following is a unique feature of credit unions? Credit Unions are typically owned and run by their members; Credit unions limit membership to entertain people or groups 14 Which type of account is typically the MOST liquid? Higher; harder What part of a check is the least important? Memo line Which of the following represent typical account fees? Arm fees; service fee; minimum balance fee 18 What's the best strategy for avoiding ATM fees? Only use ATMs in your banks network 19 What's the purpose of balancing or monitoring your checking account? To help you calculate how much money you have in your account 20 The best way to ensure the accuracy and safety of your accounts is to? Monitor your online accounts regularly 21 Which of the following payment types require you to pay upfront?

Everfi Final Study Guide 73 terms. Career Prep 36 terms. Everfi Module 7 Final Quiz 10 terms. Choose from different sets of everfi module 2 answers flashcards on Quizlet. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Which of the following statements best describes your right to check your credit history for accuracy? You can't see your credit record b. Your credit record can be checked at any time for free c. If you are turned down for credit based on a credit report, the record can be checked Log in Sign up.

Everfi Module 2 - Banking. Everfi Module 2- Banking Quiz hound. Which of the following payment types require you to pay upfront? Played times. Which of the following statements about federal student loans is TRUE? A The interest rate on your loan will be fixed over time. B The interest rates on federal loans and private loans are similar. Our interactive financial literacy class curriculum, scalable platform and in-person resources were designed not just to drive financial literacy, but financial capability. This success led to winning the Governor's Financial Literacy Award. Learn More. Glacier Bank. Types to the basics of investing, each module provides bite-sized, Guided practice activities that reinforce financial knowledge and skills. Payment Types. Which word s answers the economic question:. EverFi Module 1 - Savings - Final Quiz Answers study guide by Meowmixbellaboo includes 21 questions covering vocabulary, terms and more.

FASFA The government will pay the interest on which type of student loan for 6 months after you graduate? Subsidized Loan What type of interest rate do federal student loans have? Credit vs. Financial Literacy 32, views. EverFi has 9 modules with pre and post assessments that cover a variety of topics including. Logo Quiz is an available as an app on your smartphone or tablet. EVERFI helps colleges and universities solve the most troubling issues faced on college campuses across the country. Through online prevention education and compliance training, data insights and performance benchmarking, we deliver solutions that make colleges and universities great places to live, learn, and work.

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I agree to inMusic's Privacy policy and Terms of Use. Keys to your future everfi lesson 1 my life goals answers Get started for free! Learn everfi module 1 with free interactive flashcards. A budget can help you make plans to reach your financial goals. Click for introductory video for Lesson 1 Goals are specific objectives that help us to plan our activities and strategies.

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Keys to your future everfi lesson 1 my life goals answers. Goal 1: One life goal would be to increase my speed and accuracy at work within the next 12 months. The same principle is found in the New Testament. If you set the goal too high, try to scale it back. Because we respect your right to privacy, you can choose not to allow some types of cookies. First and foremost, you should remember that an autobiography that is also called a memoir is a story about your own life. You have to keep your answer relevant to the job description. Then, in order to be successful, they have to identify the steps they need to take to reach those goals.

Everfi Answer Key Module 2

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Medtronic Devices Driver Download For Windows 10

See the same reports as your doctor -and collaborate on your care.

CareLink™ Personal software is a free web based program that collects information directly from your diabetes management system. It allows you to generate reports that can be used during your doctor’s visits and to monitor your own progress.

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Unknown Device Identifier 9.01 on 32-bit and 64-bit PCs. This download is licensed as freeware for the Windows (32-bit and 64-bit) operating system on a laptop or desktop PC from drivers without restrictions. Unknown Device Identifier 9.01 is available to all software users as a free download for Windows. Windows® Windows XP®(SP3 or greater) Windows Vista® Windows 7® Windows 8® Windows 10® Works with devices running Android®,Motorola OS, or Windows Mobile® operating systems. Mac OS X® Mac OS® 10.5.8 Leopard Mac OS® 10.6 Snow Leopard Mac OS® 10.7 Lion Mac OS® 10.8 Mountain Lion Mac OS® 10.10 Yosemite Works with devices running. If the device-specific driver is distributed through Windows Update, you can manually update the driver by using Device Manager. For more information about how to do this, see update drivers in Windows 10. If the device is not yet connected, first install the device-specific driver, such as by using the appropriate installer.

See the same reports as your doctor

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YOUR INTERACTIVE DEMOOF CARELINK™ PERSONAL SOFTWARE STARTS HERE.

Assessment & Progress Report

This report is designed to help you view your glucose management while on your MiniMed™ 670G system. You can use this report with your healthcare professional to improve the duration of time spent in Auto Mode and determine what events caused some of your Auto Mode exits.

Weekly Review Report

This report generates weekly pump and sensor information for your MiniMed™ 670G system to show you the relationships between events. A total of 7 days can be displayed on each page.

Sensor & Meter Overview Page 1

Just like the Therapy Management Dashboard, you get a summary of all your glucose, carbohydrate, and insulin information. It gives an overview of your glycemic control (daily, overnight, and at meal times).

Explore these interactive PDFs to see how CareLink™ Personal software helps people with diabetes, their doctors and their caregivers get on the same page for more effective therapy management.

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CareLink™ Personal software support for your MiniMed system.

CareLink™ Personal is software that enables you to download your diabetes devices and see historical data that has been collected in the form of graphs, charts and reports. These reports can help you to understand the effects of insulin dosage, eating habits, exercise routine, and medication on your glucose levels and are the key to improving your diabetes control. Seeing this information in chart, graph, and table formats allows you to better identify patterns and problems that will help you work out the root cause of your low and high blood glucose levels. Follow this link for more information.

CareLink Personal software is free of charge. All you need is internet access and a CareLink connectivity device (CareLink USB or blood glucose meter). Download ion audio sound cards & media devices driver. Please contact your local distributor for more information.

Visit the Therapy management tools page for more information on insulin pumps which are currently supported by CareLink Personal Software.

Visit the Therapy management tools page for a list of glucose meters which are currently supported by CareLink Personal Software

Frequent data uploading (i.e. every 2 to 4 weeks) will provide uploads in about 2-4 minutes depending upon frequency of insulin pump use and CGM features.

You can share your reports by printing them and taking them with you, and/or saving them on your computer and e-mailing them. Drivers legend dragon laptops wallpaper. Note: Be sure to get your healthcare provider's permission before e-mailing them reports. Also, be aware that e-mail may not be a secure communication medium. CareLink Personal software is also designed so that it can integrate with CareLink Pro software (on your healthcare provider’s computer). If your healthcare provider has the CareLink Pro software, they can download your device data from your CareLink Personal in advance of your appointment (with your explicit permission and personal password).

Medtronic Devices Driver Download For Windows 10

From the main Reports page, select a report from the menu on the left-hand side of the screen. Select the date or date range for the report and click the Go button. Your report is displayed as a PDF file in a separate window.

Medtronic Devices Driver Download For Windows 10 64-bit

Simply click on the 'Forgot your password?' link displayed on the login area of the home page and a temporary password can be sent to you via e-mail. The temporary password can be used to access the system for up to 24 hours after it has been issued and you will be prompted to create a new password for use on subsequent visits.

Drivers mikado vstabi usb devices. Frequently uploading data has two advantages. First, it takes less time for each upload to be completed because less data is being copied. Second, because your device cannot hold more than three months of information, frequent uploads will help you avoid gaps in your data over time. Your healthcare professional may recommend how often you should upload data from your device. Generally we recommend uploading every 4 to 6 weeks.

Medtronic is committed to ensuring that all your personal information is kept private and protected. The CareLink system uses Secure Sockets Layer (SSL), a data encryption technology similar to the online bank standard, to ensure that data is unreadable during the transfer. CareLink Personal software complies with the strictest privacy regulations in the world, including HIPAA guidelines, and your information is processed in accordance with the applicable MENA Data Protection laws.

Microsoft®, Windows®, XP®, Vista®, and Internet Explorer® are registered trademarks of Microsoft Corporation. Mozilla® Firefox® is a registered trademark of Mozilla Corporation. Adobe® is a registered trademark and Reader™ is a trademark of Adobe Systems Inc. Java® is a trademark of Sun Microsystems, Inc. CONTOUR® is a trademark of Bayer.

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300+ TOP SCALA Interview Questions and Answers

SCALA Interview Questions for freshers experienced :-

1. What is Scala? Scala is a Java-based Hybrid programming language which is the fusion of both Functional and Object-Oriented Programming Language features. It can integrate itself with Java Virtual Machine and compile the code written. 2. How Scala is both Functional and Object-oriented Programming Language? Scala treats every single value as an Object which even includes Functions. Hence, Scala is the fusion of both Object-oriented and Functional programming features. 3.Write a few Frameworks of Scala Some of the Frameworks supported by Scala are as follows: Akka Framework Spark Framework Play Framework Scalding Framework Neo4j Framework Lift Framework Bowler Framework 4. Explain the types of Variables in Scala? And What is the difference between them? The Variables in Scala are mainly of two types: Mutable Variables We Declare Mutable Variables by using the var keyword. The values in the Mutable Variables support Changes Immutable Variables We declare Immutable Variables using the val keyword. The values in Immutable Variables do not support changes. 5. Explain Streams in Scala. In simple words, we define Stream as a Lazy list which evaluates the elements only when it needs to. This sort of lazy computation enhances the Performance of the program. 6. Mention the Advantages of Scala Some of the major Advantages of Scala are as follows: It is highly Scalable It is highly Testable It is highly Maintainable and Productive It facilitates Concurrent programming It is both Object-Oriented and Functional It has no Boilerplate code Singleton objects are a cleaner solution than Static Scala Arrays use regular Generics Scala has Native Tuples and Concise code 7. Explain the Operators in Scala The following are the Operators in Scala: Arithmetic Operators Relational Operators Logical Operators Bitwise Operators Assignment Operators 8. What is Recursion tail in Scala? ‘Recursion’ is a function that calls itself. For example, a function ‘A’ calls function ‘B’, which calls the function ‘C’. It is a technique used frequently in Functional programming. In order for a Tail recursive, the call back to the function must be the last function to be performed. 9. Explain the use of Tuples in Scala? Scala tuples combine a Finite number of items together so that the programmer can Pass a tuple around as a Whole. Unlike an Array or List, a tuple is Immutable and can hold objects with different Datatypes. 10. How is a Class different from an Object? Class combines the data and its methods whereas an Object is one particular Instance in a class.

SCALA Interview Questions 11. Why do we need App in Scala? App is a helper class that holds the main method and its Members together. The App trait can be used to quickly turn Objects into Executable programs. We can have our classes extend App to render the executable code. object Edureka extends App{ println("Hello World") } 12. What are Higher-order functions? A Higher-order function is a function that does at least one of the following: takes one or more Functions as Arguments, returns a Function as its result. 13. Explain the scope provided for variables in Scala. There are three different scopes depending upon their use. Namely: Fields: Fields are variables declared inside an object and they can be accessed anywhere inside the program depending upon the access modifiers. Fields can be declared using var as well as val. Method Parameters: Method parameters are strictly Immutable. Method parameters are mainly used to Pass values to the methods. These are accessed inside a method, but it is possible to access them from outside the method provided by a Reference. Local Variables: Local variables are declared inside a method and they are accessible only inside the method. They can be accessed if you return them from the method. 14. What is a Closure? Closure is considered as a Function whose return value is Dependent upon the value of one or more variables declared outside the closure function. Course Curriculum Apache Spark and Scala Certification Training Instructor-led SessionsReal-life Case StudiesAssessmentsLifetime Access Example: val multiplier = (i:Int) => i * 10 Here the only variable used in the function body, i * 10 , is i, which is defined as a parameter to the function 15. Explain Traits in Scala. A Trait can be defined as a unit which Encapsulates the method and its variables or fields. The following example will help us understand in a better way. trait Printable{ def print() } class A4 extends Printable{ def print(){ println("Hello") } } object MainObject{ def main(args:Array){ var a = new A4() a.print() } } 16. Mention how Scala is different from Java A few scenarios where Scala differs from Java are as follows: All values are treated as Objects. Scala supports Closures Scala Supports Concurrency. It has Type-Inference. Scala can support Nested functions. It has DSL support Traits 17. Explain extend Keyword You can extend a base Scala class and you can design an Inherited class in the same way you do it in Java by using extends keyword, but there are two restrictions: method Overriding requires the override keyword, and only the Primary constructor can pass parameters to the base Constructor. Let us understand by the following example println("How to extend abstract class Parent and define a sub-class of Parent called Child") class Child=(name:String)extends Parent(name){ override def printName:Unit= println(name) } object Child { def apply(name:String):Parent={ new Child(name) } } 18. Explain implicit classes with syntax Implicit classes allow Implicit conversations with the class’s Primary constructor when the class is in scope. Implicit class is a class marked with the “implicit” keyword. This feature was introduced in with Scala 2.10 version. //Syntax: object { implicit class Data type) { def Unit = xyz } } 19. Explain the access Modifiers available in Scala There are mainly three access Modifiers available in Scala. Namely, Private: The Accessibility of a private member is restricted to the Class or the Object in which it declared. The following program will explain this in detail. class Outer { class Inner { private def f() { println("f") } class InnerMost { f() // OK } } (new Inner).f() // Error: f is not accessible } Protected: A protected member is only Accessible from Subclasses of the class in which the member is defined. The following program will explain this in detail. package p class Super { protected def f() { println("f") } } class Sub extends Super { f() } class Other { (new Super).f() // Error: f is not accessible } } Public: Unlike Private and Protected members, it is not required to specify Public keyword for Public members. There is no explicit modifier for public members. Such members can be accessed from Anywhere. Following is the example code snippet to explain Public member class Outer { class Inner { def f() { println("f") } class InnerMost { f() // OK } } (new Inner).f() // OK because now f() is public } 20. What is a Monad in Scala? A Monad is an object that wraps another object. You pass the Monad mini-programs, i.e functions, to perform the data manipulation of the underlying object, instead of manipulating the object directly. Monad chooses how to apply the program to the underlying object. 21. Explain the Scala Anonymous Function. In the Source code, Anonymous functions are called ‘Function literals’ and at run time, function literals are instantiated into objects called Function values. Scala provides a relatively easy Syntax for defining Anonymous functions. //Syntax (z:Int, y:Int)=> z*y Or (_:Int)*(_Int) 22. How do I Append data in a list? In Scala to Append into a List, We have the following methods: use “:+” single value var myList = List.empty myList :+= "a" 23. Why Scala prefers Immutability? Scala prefers Immutability in design and in many cases uses it as default. Immutability can help when dealing with Equality issues or Concurrent programs. 24. Give some examples of Packages in Scala The three important and default Packages in Scala are as follows: Java.lang._ : Java.lang._ package in Java. Provides classes that are fundamental to the design of the Java programming language. Java.io._ : Java.io._ Package used to import every class in Scala for input-output resources. PreDef: Predef provides type aliases for types which are commonly used, such as the immutable collection types Map, Set, and the List constructors 25. Why is an Option used in Scala? Option in Scala is used to Wrap the Missing value. 26. Mention the Identifiers in Scala. There are four types of Scala Identifiers: Alphanumeric identifiers Operator identifiers Mixed identifiers Literal identifiers //Scala program to demonstrate Identifiers in Scala. object Main { //Main method def main(args: Array) { //Valid Identifiers var 'name = "Hari"' var age = 20; var Branch = "Computer Science" println() println() println() } } 27. How do you define a function in Scala? def keyword is used to define the Function in Scala. object add { def addInt( a:Int, b:Int ) : Int = { var sum:Int = 0 sum = a + b return sum } } 28. How is the Scala code compiled? Code is written in Scala IDE or a Scala REPL, Later, the code is converted into a Byte code and transferred to the JVM or Java Virtual Machine for compilation. Big Data Training 29. Explain the functionality of Yield. Yield is used with a loop, Yield produces a value for each iteration. Another way to do is to use map/flatMap and filter with nomads. for (i "#FF0000", "azure" -> "#F0FFFF") 39. Explain Exception Handling in Scala Throw Exception: Throwing an exception looks the same as in Java. You create an exception object and then you throw it with the throw keyword as follows. Throw new IllegalArgumentException Catching an Exception: Scala allows you to try/catch any exception in a single block and then perform pattern matching against it using case blocks. Try the following example program to handle the exception. Example: import java.io.FileReader import java.io.FileNotFoundException import java.io.IOException object Demo { def main(args: Array) { try { val f = new FileReader("input.txt") } catch { case ex: FileNotFoundException ={ println("Missing file exception") } case ex: IOException = { println("IO Exception") } } } } So, with this, we finished some questions on the Intermediate Level. Now, Let us move to the next level of interview questions which happen to be the Advanced Level Interview Questions. 40. Explain Pattern Matching in Scala through an example A Pattern match includes a sequence of alternatives, each starting with the Keyword case. Each alternative includes a Pattern and one or more Expressions, Scala evaluates whenever a pattern matches. An arrow symbol => separates the pattern from the expressions. Try the following example program, which shows how to match against an integer value. object Demo { def main(args: Array) { println(matchTest(3)) } def matchTest(x: Int): String = x match { case 1 = "one" case 2 = "two" case _ = "other" } } 41. Explain Extractors in Scala Course Curriculum Apache Spark and Scala Certification Training Weekday / Weekend Batches An Extractor in Scala is an object that has a method called unapply as one of its members. The purpose of that unapply method is to match the value and take it apart. 42. What is the result of x+y*z and why? Similar to any other programming language, Scala also follows Presidency and Priority tables. According to the tables, Scala Performs the operations as follows. Scala evaluates y*z first. Then adds (y*z) with x 43. What is an Auxiliary constructor We use Auxiliary constructor in Scala for Constructor Overloading. The Auxiliary Constructor must call either previously defined auxiliary constructors or primary constructor in the first line of its body. 44. Explain recursion through a program def factorial_loop(i: BigInt): BigInt = { var result = BigInt(1) for (j- 2 to i.intValue) result *= j result } for (i - 1 to 10) format("%s: %sn", i, factorial_loop(i)) 45. Explain Que with example Queue is a Data Structure similar to Stack except, it follows First In First Out procedure for data processing. In Scala, to work with Queues, you need to import a library called, import scala.collection.mutable.Queue val empty = new Queue SCALA Questions and Answers Pdf Download Read the full article

[britizzy]

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[suzanneshannon]

What is super() in JavaScript?

What's happening when you see some JavaScript that calls super()?.In a child class, you use super() to call its parent’s constructor and super.<methodName> to access its parent’s methods. This article will assume at least a little familiarity with the concepts of constructors and child and parent classes. If that's totally new, you may want to start with Mozilla's article on Object-oriented JavaScript for beginners.

Super isn't unique to Javascript — many programming languages, including Java and Python, have a super() keyword that provides a reference to a parent class. JavaScript, unlike Java and Python, is not built around a class inheritance model. Instead, it extends JavaScript’s prototypal inheritance model to provide behavior that’s consistent with class inheritance.

Let’s learn a bit more about it and look at some code samples.

First off, here’s a quote from Mozilla’s web docs for classes:

JavaScript classes, introduced in ECMAScript 2015, are primarily syntactical sugar over JavaScript's existing prototype-based inheritance. The class syntax does not introduce a new object-oriented inheritance model to JavaScript.

An example of a simple child and parent class will help illustrate what this quote really means:

See the Pen ZEzggLK by Bailey Jones (@bailey_jones) on CodePen.

My example has two classes: fish and trout. All fish have information for habitat and length, so those properties belong to the fish class. Trout also has a property for variety, so it extends fish to build on top of the other two properties. Here are the constructors for fish and trout:

class fish { constructor(habitat, length) { this.habitat = habitat this.length = length } } class trout extends fish { constructor(habitat, length, variety) { super(habitat, length) this.variety = variety } }

The fish class’s constructor defines habitat and length, and the trout’s constructor defines variety. I have to call super() in trout’s constructor, or I’ll get a reference error when I try to set this.variety. That's because on line one of the trout class, I told JavaScript that trout is a child of fish using the extends keyword. That means trout’s this context includes the properties and methods defined in the fish class, plus whatever properties and methods trout defines for itself. Calling super() essentially lets JavaScript know what a fish is so that it can create a this context for trout that includes everything from fish, plus everything we’re about to define for trout. The fish class doesn’t need super() because its “parent” is just the JavaScript Object. Fish is already at the top of the prototypal inheritance chain, so calling super() is not necessary — fish’s this context only needs to include Object, which JavaScript already knows about.

The prototypal inheritance model for fish and trout and the properties available on the this context for each of them. Starting from the top, the prototypal inheritance chain here goes Object → fish → trout.

I called super(habitat, length) in trout’s constructor (referencing the fish class), making all three properties immediately available on the this context for trout. There’s actually another way to get the same behavior out of trout’s constructor. I must call super() to avoid a reference error, but I don’t have to call it “correctly” with parameters that fish's constructor expects. That's because I don't have to use super() to assign values to the fields that fish creates — I just have to make sure that those fields exist on trout's this context. This is an important difference between JavaScript and a true class inheritance model, like Java, where the following code could be illegal depending on how I implemented the fish class:

class trout extends fish { constructor(habitat, length, variety) { super() this.habitat = habitat this.length = length this.variety = variety } }

This alternate trout constructor makes it harder to tell which properties belong to fish and which belong to trout, but it gets the same result as the previous example. The only difference is that here, calling super() with no parameters creates the properties habitat and length on the current this context without assigning anything to them. If I called console.log(this) after line three, it would print {habitat: undefined, length: undefined}. Lines four and five assign values.

I can also use super() outside of trout’s constructor in order to reference methods on the parent class. Here I’ve defined a renderProperties method that will display all the class’s properties into the HTML element I pass to it. super() is useful here because I want my trout class to implement a similar method that does the same thing plus a little more — it assigns a class name to the element before updating its HTML. I can reuse the logic from the fish class by calling super.renderProperties() inside the relevant class function.

class fish { renderProperties(element) { element.innerHTML = JSON.stringify(this) } } class trout extends fish { renderPropertiesWithSuper(element) { element.className="green" super.renderProperties(element); }

The name you choose is important. I’ve called my method in the trout class renderPropertiesWithSuper() because I still want to have the option of calling trout.renderProperties() as it’s defined on the fish class. If I’d just named the function in the trout class renderProperties, that would be perfectly valid; however, I’d no longer be able to access both functions directly from an instance of trout - calling trout.renderProperties would call the function defined on trout. This isn't necessarily a useful implementation - it's an arguably better pattern for a function that calls super like this to overwrite its parent function's name - but it does illustrate how flexible JavaScript allows your classes to be.

It is completely possible to implement this example without the use of the super() or extends keywords that were so helpful in the previous code sample, it's just much less convenient. That's what Mozilla meant by "syntactical sugar." In fact, if I plugged my previous code into a transpiler like Babel to make sure my classes worked with older versions of JavaScript, it would generate something closer to the following code. The code here is mostly the same, but you'll notice that without extends and super(), I have to define fish and trout as functions and access their prototypes directly. I also have to do some extra wiring on lines 15, 16, and 17 to establish trout as a child of fish and to make sure trout can be passed the correct this context in its constructor. If you're interested in a deep dive into what's going on here, Eric Green has an excellent post with lots of code samples on how to build classes with and without ES2015.

See the Pen wvvdxdd by Bailey Jones (@bailey_jones) on CodePen.

Classes in JavaScript are a powerful way to share functionality. Class components in React, for example, rely on them. However, if you're used to Object Oriented programming in another language that uses a class inheritance model, JavaScript's behavior can occasionally be surprising. Learning the basics of prototypal inheritance can help clarify how to work with classes in JavaScript.

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