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: maps in javascript
const obj1 = { name: 'ismail' };
const obj2 = { name: 'sulman' };
const obj3 = { name: 'naeem' };
firstMap = new Map([
[
[obj1, [{ date: 'yesterday', price: '10$' }]],
[obj2, [{ date: 'today', price: '100$' }]]
]
]);
firstMap.set(obj3, [{ date: "yesterday", price: '150$' }]);
for (const entry of firstMap.entries()) {
console.log(entry);
};
console.log(firstMap);
firstMap.delete(obj3);
console.log(firstMap);
Example 3: how to use the map method in javascript
const numbers = [1, 2, 3, 4, 5];
const bigNumbers = numbers.map(number => {
return number * 10;
});
Example 4: map in javascript
const arr = [1,2,3,4]
const sqrs = arr.map((num) => num ** 2)
console.log(sqrs)
console.log(arr)
Example 5: map in js
const data = {name: "laptop", brands: ["dell", "acer", "asus"]}
let inside_data = data.brands.map((i) => {
console.log(i);
});
Example 6: map in javascript
['elem', 'another', 'name'].map((value, index, originalArray) => {
console.log(.....)
});