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Functions and Objects in JavaScript

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by Abdul Rawoof A R dot icon Updated: Mar 2, 2023

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In JavaScript, a collection of functions and data is called an object, whereas a collection of commands and data is called a function. To perform a certain task, we may call this community of functionality an object when many functions work together. 


Function: A set of statements that performs a task or calculates a value. For a procedure to qualify as a function in JavaScript, it should take some input from the user and returns an output where there is some obvious relationship between the input and the output. In JavaScript, for every kind of function, we have three unique ways to define it, 

  • Declaration function. 
  • Function*. 
  • Asynchronous function. 
  • Synchronous function. 


Object: it is a standalone entity with properties and types and is used to store various keyed collections and more complex entities. The objects can be created using the object() constructor or the object initializer/literal syntax. In JavaScript, we have six types of objects, 

  • Object 
  • Date 
  • Array 
  • String 
  • Number 
  • Boolean 


Here is an example of functions and objects in JavaScript:

Fig : Preview of the output that you will get on running this code from your IDE.

Code

Functions and Objects in Javascript

JavaScriptdotLines of Code : 12dotLicense : Strong Copyleft (CC BY-SA 4.0)

function transformFirstAndLast(array) {

  var myObject = {};
    myObject[array[0]] = array[array.length-1];
    return myObject;
}

  var arrayList = ['Queen', 'Elizabeth', 'Of Hearts', 'Beyonce'];
  var arrayList2 = ['Kevin', 'Bacon', 'Love', 'Hart', 'Costner', 'Spacey']
  
  console.log(transformFirstAndLast(arrayList));
  console.log(transformFirstAndLast(arrayList2));

Instructions

Follow the steps carefully to get the output easily.

  1. Install JavaScript ES6 code snippet and Code Runner from Extension on your IDE(We use Visual Studio Code).
  2. Copy the snippet using the 'copy' and create one new file filename.js(eg.test.js) then paste the code in that JavaScript file.
  3. Save the file and run the file using run button to generate the output.


I hope you found this useful.


I found this code snippet by searching for 'functions and objects in javascript' in kandi. You can try any such use case!

Environment Tested

I tested this solution in the following versions. Be mindful of changes when working with other versions.

  1. The solution is created and tested in Visual Studio Code 1.74.1.
  2. JavaScript ES6 Code Snippet version v1.8.0.
  3. Code Runner version v0.11.8.


Using this solution, we are able to implement functions and objects in javascript with simple steps. This process also facilities an easy way to use, hassle-free method to create a hands-on working version of code which would help us to implement functions and objects in javascript.

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