how to map an array in javascript code example
Example 1: javascript map function
const posts = [
{ id: 1, title: "Sample Title 1", description: "Lorem ipsum dolor sit amet, consectetur adipiscing elit..." },
{ id: 2, title: "Sample Title 2", description: "Lorem ipsum dolor sit amet, consectetur adipiscing elit..." },
{ id: 3, title: "Sample Title 3", description: "Lorem ipsum dolor sit amet, consectetur adipiscing elit..." },
];
const postIds = posts.map((post) => post.id);
const postSummaries = posts.map((post) => ({ id: post.id, title: post.title }));
var postIds = posts.map(function (post) { return post.id; });
var postSummaries = posts.map(function (post) { return { id: post.id, title: post.title }; });
Example 2: how the map function works javascript
const array = [2, 5, 9];
let squares = array.map((num) => num * num);
console.log(array);
console.log(squares);
Example 3: array map
let numbers = [1, 4, 9]
let roots = numbers.map(function(num) {
return Math.sqrt(num)
})
Example 4: map method
var yourArray= yourArray.map(Number);