How to filter an array and objects using JavaScript

JavaScript

navya, Credit to volkotech-solutions Nov 22

We can filter the array using the filter() function, it takes the output based on the condition and returns a new array.

array.js

// filter property for arrays using function call

var x = [1, -3, -5, 3, 9, 0, 11];
var y = x.filter(function (value) {
  return value > 0;
});

console.log(x); // output: [1, -3, -5, 3, 9, 0, 11]
console.log(y); // output: [1,3,9,11]

// filter property for objects
//Example:1
//In this example, the filter() function returns a new array by taking the item id number 2 which is the condition that we have given

let users = [
  { id: 1, name: "John" },
  { id: 2, name: "Pete" },
  { id: 3, name: "Mary" },
];

let user = users.filter((item) => item.id == 2);
console.log(user); 

// output 
//0:
//id: 2
//name: "Pete"
//[[Prototype]]: Object
//length: 1

//Example:2 
//In this example, the filter() function returns a new array with the object values that are less than id number 2.

let users1 = [
  { id: 1, name: "John" },
  { id: 2, name: "Pete" },
  { id: 3, name: "Mary" },
  { id: 4, name: "" },
];

let someUsers = users1.filter((item) => item.id < 2);

//output:
//id: 1
//name: "John"
//[[Prototype]]: Object
//length: 1
//[[Prototype]]: Array(0)

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Navya

Software engineer at VolkoTech Solutions

Dedicated and skilled Drupal Frontend developer, carrying 3+ years of experience with a proven track record of delivering high-quality, scalable web solutions and optimized themes with an organized Git workflow. Proficient in JavaScript, jQuery, HTML, CSS, SASS, Bootstrap, and PHP with a deep understanding of Drupal’s architecture and modules. Strong knowledge of web development best practices and search engine optimization principles.

VolkoTech Solutions

Drupal development company in india

Drupal web development & Consulting company in India.

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