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winstonmhangoblog · 5 years ago
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OOP JavaScript : Classes are not classes in JavaScript 👩‍💻👴🏻👴🏻. Let's take a look what exactly classes are in Javascript now that up to this 7th slides set agree that Javascript is a prototype based Object Oriented Programming language. Yes,they are not classes,but functions behind the scene.They are classes and work classically on the surface. Let's dive in at take a look. #javascripttricks #javascriptobjects #classexpressions #constructorfunctions #objectorientedprogramming #prototypes #prototypeinheritance (at Lilongwe, Malawi) https://www.instagram.com/p/CCJYdaIBoDr/?igshid=4avmysv51v7s
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codesolutionsstuff · 3 years ago
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JavaScript Program to Create Objects in Different Ways
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You will discover various methods for creating JavaScript objects in this example. You should be familiar with the following JavaScript programming concepts to comprehend this example: - Objects in JavaScript - Constructor function in JavaScript An object can be made in one of three ways: - The use of object literal - By explicitly constructing an Object instance - Making use of the constructor function
Example 1: The use of object literal
// a programmer that uses object literals to construct JavaScript objects const person = { name: 'Shailesh', age: 20, hobbies: , common: function() { console.log('Hello everyone.'); }, score: { maths: 90, marathi: 80 } }; console.log(typeof person); console.log(person.name); console.log(person.hobbies); person.common(); console.log(person.score.maths); Output object Shailesh reading Hello everyone. 90 We have generated an object called person in this code. An object literal can be used to build an object. To generate an item directly, an object literal employs the symbol. A key:value pair creates an object. Functions, arrays, and even objects can all be defined inside of another object. Using dot notation, you can get at the object's value. The following syntax is used to create an object using an object instance: const objectName = new Object();
Example 2: By explicitly constructing an object instance
// a programmer that uses object literals to construct JavaScript objects const person = new Object ( { name: 'Shailesh', age: 20, hobbies: , common: function() { console.log('Hello everyone.'); }, score: { maths: 90, science: 80 } }); console.log(typeof person); console.log(person.name); console.log(person.hobbies); person.common(); console.log(person.score.maths); Here, an object is created by using the new keyword together with the Object() instance.
Example 3: Create an object using Constructor Function
// program to create JavaScript object using instance of an object function Person() { this.name = 'Shailesh', this.age = 20, this.hobbies = , this.common= function() { console.log('Hello everyone.'); }, this.score = { maths: 90, science: 80 } } const person = new Person(); console.log(typeof person); // object // accessing the object value console.log(person.name); console.log(person.hobbies); person.common(); console.log(person.score.maths); The new keyword is used in the example above to create an object using the Person() Constructor function. An object is made by calling new Person(). Read the full article
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winstonmhangoblog · 5 years ago
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Implementing OOP inheritance using constructor functions in Javascript. So far we have seen that JavaScript is a prototype based programming language but can also implement pretty well the OOP principles. In this slides set we are looking at how constructor functions work behind the scenes to get away with the implementation of inheritance in Javascript. We look at how to construct a constructor function as a blue print,create instances from it as well as challenges associated with constructors and a variety of work arounds. Enjoy the reading #constructorfunctions #inheritance #javascriptoop #javascripttricks (at Lilongwe, Malawi) https://www.instagram.com/p/CB-339GBvo8/?igshid=1fr3aajo254xg
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winstonmhangoblog · 5 years ago
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JavaScript OOP: Different methods of Creating objects. This slide set introduces the various methods of Creating objects. This tutorial is a preparatory tutorial towards understanding prototypal inheritance in JavaScript. It is essential that you understand Object if you are to understand prototypal inheritance. What OOP does is enforcing use of objects and best usage thereof. #javascript #inheritance #prototypes #prototypeinheritance #constructorfunctions (at Lilongwe, Malawi) https://www.instagram.com/p/CBBjltXhjTF/?igshid=avzb94saftu
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