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: array map javascript
const array1 = [1, 4, 9, 16];
const map1 = array1.map(x => x * 2);
console.log(map1);
Example 3: 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 4: javascript map
const numbers = [0,1,2,3];
console.log(numbers.map((number) => {
return number;
}));
Example 5: javascript map array
const array1 = [1, 4, 9, 16];
const map1 = array1.map(x => x * 2);
console.log(map1);
Example 6: map in javascript
['elem', 'another', 'name'].map((value, index, originalArray) => {
console.log(.....)
});