map to array javascript
let map = new Map().set('a', 1).set('b', 2),
array = Array.from(map, ([name, value]) => ({ name, value }));
console.log(array);map to array javascript
let map = new Map().set('a', 1).set('b', 2),
array = Array.from(map, ([name, value]) => ({ name, value }));
console.log(array);how the map function works javascript
const array = [2, 5, 9];
let squares = array.map((num) => num * num);
console.log(array); // [2, 5, 9]
console.log(squares); // [4, 25, 81]array mdn map
let new_array = arr.map(function callback( currentValue[, index[, array]]) {
// return element for new_array
}[, thisArg])javascript map array
const sweetArray = [2, 3, 4, 5, 35]
const sweeterArray = sweetArray.map(sweetItem => {
return sweetItem * 2
})
console.log(sweeterArray)javascript map array
const myArray = ['Sam', 'Alice', 'Nick', 'Matt'];
// Appends text to each element of the array
const newArray = myArray.map(name => {
return 'My name is ' + name;
});
console.log(newArray); // ['My name is Sam', 'My Name is Alice', ...]
// Appends the index of each element with it's value
const anotherArray = myArray.map((value, index) => index + ": " + value);
console.log(anotherArray); // ['0: Sam', '1: Alice', '2: Nick', ...]
// Starting array is unchanged
console.log(myArray); // ['Sam', 'Alice', 'Nick', 'Matt']map in javascript
let myMap = new Map()
let keyString = 'a string'
let keyObj = {}
// setting the values
myMap.set(keyString, "value associated with 'a string'")
myMap.set(keyObj, 'value associated with keyObj')
myMap.set(keyFunc, 'value associated with keyFunc')
myMap.size // 3
// getting the values
myMap.get(keyString) // "value associated with 'a string'"
myMap.get(keyObj) // "value associated with keyObj"
myMap.get(keyFunc) // "value associated with keyFunc"Copyright © 2021 Codeinu
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