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Understanding ES6 Modules: A Beginner’s Guide to JavaScript’s Powerful Feature

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Understanding ES6 Modules: A Beginner’s Guide to JavaScript’s Powerful Feature

Demystifying ES6 Modules: A Practical Walkthrough

JavaScript has evolved significantly over the years, and one of its most powerful advancements in recent times is the introduction of ES6 modules. These modules bring a new level of clarity and structure to JavaScript codebases, making it easier to organize, maintain, and share code among projects.

What Are ES6 Modules?

ES6 modules are a way to encapsulate code into small, reusable pieces. They allow developers to export parts of a module (like classes, functions, or variables) and import them in other modules, promoting a cleaner and more modular code structure.

A Look at the Code

Let’s dive into an example to see ES6 modules in action:

File: main.js

JavaScript

import User, printAge, printName from "./new.js"; let sahil = new User("Sahil Ahlawat", 10); printAge(sahil); printName(sahil);

File: new.js

JavaScript

export default class User constructor(name, age) this.name = name; this.age = age; export function printAge(user) console.log(`Age of user is : $user.age`); export function printName(user) console.log(`Name of user is : $user.name`);

In new.js, we define a User class and two functions, printAge and printName. We then export these so they can be used in other files. In main.js, we import these exports and use them to create a new User object and print its details.

Setting Up Your package.json

To ensure Node.js treats our .js files as ES6 modules, we need to add a "type": "module" line to our package.json:

File: package.json

JSON

"name": "modules", "version": "1.0.0", "description": "Modules tutorial", "type": "module", "main": "main.js", "scripts": "test": "echo \"Error: no test specified\" && exit 1" , "author": "Sahil Ahlawat", "license": "ISC"

With this setup, running node main.js will execute our code with ES6 module support.

Benefits of Using ES6 Modules

Reusability: Code can be shared across different parts of an application or even different projects.

Maintainability: Clearer project structure makes it easier to manage and update code.

Namespace: Avoid global namespace pollution, which can lead to fewer bugs.

Conclusion

ES6 modules are a significant step forward in JavaScript development. They offer a robust way to organize code, making it more readable and maintainable. By embracing this feature, developers can improve their workflow and create more scalable applications.

This blog post provides a clear explanation of ES6 modules, demonstrates their usage with your code, and explains how to set up a Node.js project to use them. It’s written in an accessible way that should appeal to both beginners and experienced developers alike.

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Top 10 best laptops for software development under 1 lakh in 2024 | Freelancing gadgets

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Top 10 best laptops for software development under 1 lakh in 2024 | Freelancing gadgets

Are you worried about finding the best laptop for your needs and budget?

Don’t worry! We have selected the best laptops for you that cost less than 1 lakh rupees. Whether you are a coder looking for the best laptops for coding, a freelancer in search of the best laptop for freelancing, or a software developer seeking top laptops for software developers, we have a laptop that will help you do your best. Our selection includes slim and stylish laptops, powerful gaming laptops, and laptops with the latest features. You can find the perfect laptop for you that costs less than 1 lakh rupees!

Factors we considered for choosing the Best Laptop Under 1 Lakh Rupees

When choosing the best laptops under 1 lakh rupees, we consider five main factors: the screen, the processor, the RAM, the storage, and the graphics card. But most importantly, we also consider the price to ensure it fits within your budget.

Screen: The screen is very important. We look for clear, bright screens that are easy on the eyes. Whether you’re a software developer or a freelancer, a good screen can make all the difference.

Processor: The processor is the brain of the laptop. A good processor can make your laptop run smoothly and quickly. This is especially important for coding, as the best laptops for coding need fast processors.

RAM: RAM is the laptop’s memory. More RAM can help your laptop handle more tasks at once. This is crucial for software developers, as the top laptops for software developers usually have a lot of RAM.

Storage: Storage is where your laptop keeps your files and programs. We look for laptops with enough storage for all your files, whether you’re coding, freelancing, or gaming.

Graphics Card: The graphics card handles images and video. If you’re into gaming or graphic design, a good graphics card is very important.

Remember, the best laptop for you depends on what you need. A gamer might need a strong graphics card, while a coder might care more about a fast processor. That’s why we look at all these factors to find the best laptops for everyone, including the best laptops for coding, the best laptop for freelancing, and the top laptops for software developers, all under 1 lakh rupees.

Our Top Picks: Best Laptops for Coding, Freelancing, and Software Developers

Here’s a simple table listing our top 10 Best Laptops for Coding, Freelancing, and Software Developers under 1 lakh.

Rank & ScoreLaptop Specifications & ReasonPrice (INR)Buy1 (9.2)MSI Modern 15 H :  Intel Core i7-13700H Up To 5GHz, 16GB DDR4, 15.6″ FHD (1920×1080), IPS-Level, 1TB NVMe SSD PCIe Gen4, Intel Iris Xe Graphics. This laptop is thin & light design, powerful specs.Rs 79990Amazon Link2 (9.0)ASUS Vivobook S 15 OLED (2023): Intel Core i9-13900H 13th Gen, 16GB DDR4, 15.6″ 2.8K 120Hz OLED, Up to 8 hours battery life, Integrated Intel Iris Xe Graphics, 512GB NVMe SSD. This laptop is powerful performance, high-resolution display, and sleek design.Rs 99000Amazon Link3 (8.8)Dell G15 5520 Gaming Laptop: Intel i5-12500H, 16GB DDR5, 15.6″ FHD 144Hz, Up to 6 hours battery life, NVIDIA RTX 3050, 512GB NVMe SSD. This laptop is dedicated graphics for design and multimedia work.Rs 81990Amazon Link4 (8.5)Lenovo Yoga Slim 6 Intel Evo Core i5 1240P: Intel Evo Core i5 1240P, 16GB DDR4, 14″ 2.2K OLED, Up to 10 hours battery life, Integrated Intel Iris Xe Graphics, 512GB NVMe SSD. This laptop is lightweight, long battery life, and reliable performance.Rs 79190Amazon Link5 (8.0)Acer Swift Go 14 AI PC Premium Laptop : Intel Core Ultra 5 125H, 16GB DDR4, 14-inch FHD Touchscreen IPS Display, 1TB SSD NVMe Storage, Intel Iris Xe Integrated Graphics. This laptop is lightweight, touchscreen, and powerful specs.Rs 89,999Amazon Link6 (7.8)Lenovo Legion 5 Laptop: Intel Core i7 13620H, 16GB DDR4, 15.6-inch FHD 144Hz, 512GB SSD, NVIDIA RTX 3060. This laptop is high-performance gaming laptop with great display.Rs 1,29,990Amazon Link7 (8.2)LG Gram 16 Ultra-Light Intel Evo: Intel Core i7-1165G7, 16GB DDR4, 16-inch WQXGA (2560×1600) IPS Display, 1TB SSD, Intel Iris Xe Graphics. This laptop is ultra-lightweight, large display, and impressive battery life.Rs 1,18,499Amazon Link8 (7.5)ASUS Zenbook S 13 OLED: Intel Core i7-1165G7, 16GB LPDDR4X, 13.9-inch 3.3K OLED, 1TB NVMe SSD, Intel Iris Xe Graphics. This laptop is premium build, OLED display, and fast storage.Rs 94000Amazon Link9 (8.7)ASUS ZenBook Duo 14: Intel Core i7-1165G7, 16GB LPDDR4X, 14-inch FHD ScreenPad Plus, 1TB NVMe SSD, NVIDIA MX450. This laptop is dual-screen design for multitasking and creativity.Rs 97990Amazon Link10 (7.0)HP Pavilion 14: 12th Gen Intel Core i7, 16GB DDR4, 14-inch QHD IPS Display, 512GB NVMe SSD, This laptop is integrated AMD Radeon Graphics. Lightweight, powerful AMD processor, and vibrant display.Rs 74888Amazon Link

More details about best laptop under 1 lakh in 2014

MSI Modern 15 H C13M-080IN:

Processor: Intel 13th Gen i7-13700H

RAM: 16GB DDR4

Screen: 15.6″ FHD (1920×1080), IPS-Level

Battery Life: Check Price

Graphics: Intel Iris Xe Graphics

Storage: 1TB NVMe SSD PCIe Gen4

Price: Check Price

Score: –

Reason: Thin & light design, powerful specs

ASUS Vivobook S 15 OLED (2023):

Processor: Intel Core EVO i5-13500H

RAM: 16GB DDR4

Screen: 15.6″ 2.8K 120Hz OLED

Battery Life: Up to 8 hours

Graphics: Integrated Intel Iris Xe Graphics

Storage: 512GB NVMe SSD

Price: 95,000

Score: 9.2

Reason: Powerful performance, high-resolution display, and sleek design

Dell G15 5520 Gaming Laptop:

Processor: Intel i5-12500H

RAM: 16GB DDR5

Screen: 15.6″ FHD 144Hz

Battery Life: Up to 6 hours

Graphics: NVIDIA RTX 3050

Storage: 512GB NVMe SSD

Price: 98,000

Score: 9.0

Reason: Dedicated graphics for design and multimedia work

Lenovo Yoga Slim 6 Intel Evo Core i5 1240P:

Processor: Intel Evo Core i5 1240P

RAM: 16GB DDR4

Screen: 14″ 2.2K OLED

Battery Life: Up to 10 hours

Graphics: Integrated Intel Iris Xe Graphics

Storage: 512GB NVMe SSD

Price: 92,000

Score: 8.5

Reason: Lightweight, long battery life, and reliable performance

Apple 2023 MacBook Air Laptop with M2 chip:

Processor: M2 chip

RAM: 8GB LPDDR5

Screen: 13.3″ Retina Display

Battery Life: Up to 12 hours

Graphics: Integrated Apple GPU

Storage: 256GB SSD

Price: 96,000

Score: 9.5

Reason: Seamless coding experience with Touch ID

Acer Swift 5 EVO:

Processor: Intel Core i7-1165G7

RAM: 16GB DDR4

Screen: 14-inch FHD Touchscreen IPS Display

Storage: 1TB SSD NVMe Storage

Graphics: Intel Iris Xe Integrated Graphics

Price: ₹92,999

Score: –

Reason: Lightweight, touchscreen, and powerful specs

Lenovo Legion 5 Laptop:

Processor: Intel Core i9 11th Gen

RAM: 16GB DDR4

Screen: 15.6-inch FHD 144Hz

Storage: 512GB SSD

Graphics: NVIDIA RTX 3060

Price: Check Price

Score: –

Reason: High-performance gaming laptop with great display

LG Gram 16 Ultra-Light Intel Evo:

Processor: Intel Core i7-1165G7

RAM: 16GB DDR4

Screen: 16-inch WQXGA (2560×1600) IPS Display

Storage: 1TB SSD

Graphics: Intel Iris Xe Graphics

Price: Check Price

Score: –

Reason: Ultra-lightweight, large display, and impressive battery life

ASUS Zenbook S 13 OLED:

Processor: Intel Core i7-1165G7

RAM: 16GB LPDDR4X

Screen: 13.9-inch 3.3K OLED

Storage: 1TB NVMe SSD

Graphics: Intel Iris Xe Graphics

Price: Check Price

Score: –

Reason: Premium build, OLED display, and fast storage

ASUS ZenBook Duo 14:

Processor: Intel Core i7-1165G7

RAM: 16GB LPDDR4X

Screen: 14-inch FHD ScreenPad Plus

Storage: 1TB NVMe SSD

Graphics: NVIDIA MX450

Price: Check Price

Score: –

Reason: Dual-screen design for multitasking and creativity

HP Pavilion Aero:

Processor: AMD Ryzen 7 5800U

RAM: 16GB DDR4

Screen: 14-inch QHD IPS Display

Storage: 512GB NVMe SSD

Graphics: Integrated AMD Radeon Graphics

Price: Check Price

Score: –

Reason: Lightweight, powerful AMD processor, and vibrant display

These laptops are great for a variety of tasks, including coding, freelancing, and software development. They offer a good balance of performance and price, making them some of the best laptops under 1 lakh rupees. Remember, the best laptop for you depends on your specific needs and budget.

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Write for us (Technology, Code, Freelancing, Teaching, Websites and Softwares)

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Write for us (Technology, Code, Freelancing, Teaching, Websites and Softwares)

Write For Us at freelancingdiary.com

I’m thrilled to welcome you to our community fellow techies. As someone who has worked as a freelancer, I understand the challenges that comes with it. I started this freelancingdiary.com to create a space where we can share our experiences, learn from each other, and grow together.

Why Write for Us?

When I started FreelancingDiary.com, my goal was to build a community of like-minded individuals who are passionate about freelancing, digital nomad lifestyle, and technology. By writing for us, you’re not just sharing your insights – you’re also helping others who might be facing the similar challenges.

It’s also a great way to showcase your expertise and build your online presence.

What We’re Looking For

We’re interested in stories that are honest, insightful, and inspiring. Here are some topics you can consider:

Freelancing Tips and Tricks: How did you land your first client? What strategies work best for you when it comes to pricing your services? Share your top tips and tricks.

Digital Nomad Lifestyle: What’s it like to work from a beach in Bali or a cafe in Paris? Share your experiences and tips for living the digital nomad lifestyle.

Remote Work Strategies: How do you stay productive when working from home? What tools and strategies do you use? Share your best practices.

Productivity Tools and Software: What tools do you use to stay organized and manage your projects? Write a review or share your top picks.

Personal Growth Strategies for Freelancers: How do you continue learning and growing professionally? Share your favorite resources or personal growth strategies.

Entrepreneurship and Startups: Have you launched your own business or worked with a startup? Share your journey and the lessons you’ve learned along the way.

Tech Reviews and Product Comparisons: Are you a tech enthusiast? Share your reviews of the latest gadgets, apps, and tech products.

Emerging Technologies and Their Impact on Freelancing: How are emerging technologies changing the freelancing landscape? Share your insights and predictions.

Coding Challenges and solution: Discussing different coding challenges and methodologies and trends and challenges that comes with it.

How to Submit

If you’re ready to share your story, send your article to info@freelancingdiary.com. I can’t wait to read your submission!

After You Submit

Once you’ve submitted your article, I’ll personally review it to ensure it meets our guidelines and standards. If your article is accepted, I’ll let you know when it will be published. Please note that I may make minor edits to your article for clarity, readability, and SEO.

Thank you for your interest in writing for freelancingdiary.com. I look forward to reading your submissions and sharing your insights with our community!

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242. Valid Anagram

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242. Valid Anagram

Problem

Given two strings s and t, return true if t is an anagram of s, and false otherwise.

An Anagram is a word or phrase formed by rearranging the letters of a different word or phrase, typically using all the original letters exactly once.

Example 1:Input: s = “anagram”, t = “nagaram” Output: true

Example 2:Input: s = “rat”, t = “car” Output: false

Constraints:

1 <= s.length, t.length <= 5 * 104

s and t consist of lowercase English letters.

Follow up: What if the inputs contain Unicode characters? How would you adapt your solution to such a case?

Solution

First attempt : (Non optimized)

/** * @param string s * @param string t * @return boolean */ var isAnagram = function(s, t) const sset = s.split(""); const tset = t.split(""); if(s.length == t.length) for(let i = 0 ; i < sset.length; i++) let value =sset[i]; if(tset.includes(value)) let index = tset.indexOf(value); tset.splice(index,1) else return false; else return false; return true ;

After giving it a second attempt I tried optimizing it further and here is what I have done so far :

/** * @param string s * @param string t * @return boolean */ var isAnagram = function(s, t) let ss = s.split(""); let tt = t.split(""); const dict = if(s.length == t.length) for(let i = 0 ; i < ss.length; i++) if(dict[ss[i]]) dict[ss[i]]++; else dict[ss[i]] = 1; for(let y = 0 ; y < tt.length; y++) if(dict[tt[y]]) dict[tt[y]]--; else return false; else return false; return true ;

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Learn how to make your own website in 2024 within 1 hour using WordPress.

This is a step by step guide from domain and hosting setup to wordpress setup.

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Permutations and Combinations in Data Structures and Algorithms with JavaScript

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Permutations and Combinations in Data Structures and Algorithms with JavaScript

In the realm of Data Structures and Algorithms (DSA), permutations and combinations play a crucial role. They are fundamental concepts in combinatorics and have wide-ranging applications in computer science, particularly in DSA.

Permutations

A permutation is an arrangement of all the members of a set into some sequence or order. The number of permutations on a set of n elements is given by n! (n factorial).

Here’s a simple JavaScript function to calculate n!:

JavaScript

function factorial(n) if (n === 0) return 1; return n * factorial(n - 1);

Combinations

A combination is a selection of items from a larger set, where the order of selection does not matter. The number of combinations of n items taken r at a time is given by nCr = n! / r!(n-r)!.

Here’s a JavaScript function to calculate nCr:

JavaScript

function combination(n, r) return factorial(n) / (factorial(r) * factorial(n - r));

Top 5 Algorithms for Implementing Permutations and Combinations

1. Generating All Permutations

Here’s a simple recursive algorithm to generate all permutations of a given string:

JavaScript

function permute(str, l, r) if (l == r) console.log(str); else for (let i = l; i <= r; i++) str = swap(str, l, i); permute(str, l + 1, r); str = swap(str, l, i); // backtrack function swap(str, i, j) let charArray = str.split(''); let temp = charArray[i]; charArray[i] = charArray[j]; charArray[j] = temp; return charArray.join('');

2. Generating All Combinations

Here’s a simple recursive algorithm to generate all combinations of a given string:

JavaScript

function combine(str, start, end, output) for (let i = start; i <= end; i++) output += str[i]; console.log(output); if (i < str.length - 1) combine(str, i + 1, end, output); output = output.slice(0, output.length - 1);

3. Heap’s Algorithm for Generating Permutations

Heap’s algorithm generates all possible permutations of n objects. It minimizes movement: it generates each permutation from the previous one by interchanging a single pair of elements.

JavaScript

function heapPermutation(a, size, n) if (size == 1) console.log(a.join('')); return; for (let i = 0; i < size; i++) heapPermutation(a, size - 1, n); if (size % 2 == 1) let temp = a[0]; a[0] = a[size - 1]; a[size - 1] = temp; else let temp = a[i]; a[i] = a[size - 1]; a[size - 1] = temp;

4. Lexicographically Sorted Permutations

This algorithm generates permutations in lexicographically sorted order.

JavaScript

function sortedPermutations(str) let chars = str.split('').sort(); while (true) console.log(chars.join('')); let i = chars.length - 2; while (i >= 0 && chars[i] >= chars[i + 1]) i--; if (i < 0) break; let j = chars.length - 1; while (chars[j] <= chars[i]) j--; [chars[i], chars[j]] = [chars[j], chars[i]]; // swap chars = chars.slice(0, i + 1).concat(chars.slice(i + 1).reverse());

5. Combinations using Backtracking

This algorithm generates all combinations of a string using backtracking.

JavaScript

function combinations(str, index, data, i) if (index == i) console.log(data.join('')); return; if (i >= str.length) return; data[index] = str[i]; combinations(str, index + 1, data, i + 1); combinations(str, index, data, i + 1);

These are just a few examples of how permutations and combinations can be implemented in JavaScript. They are fundamental concepts in DSA and understanding them can help solve complex problems more efficiently.