how map works 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: map in javascript
const arr = [1,2,3,4]
const sqrs = arr.map((num) => num ** 2)
console.log(sqrs)
console.log(arr)
Example 3: map in javascript
['elem', 'another', 'name'].map((value, index, originalArray) => {
console.log(.....)
});
Example 4: javascript map
The map() method creates a new array with the results of calling a provided function on every element in the calling array.