Map Comment Log For Free

Map() constructor is used to create Map in JavaScript. Map object provided by ES6. A key of a Map may occur once, which will be unique in the map's collection. There are slight advantages to using a map rather than an object.

Let's see a simple example of values() method. <script> var map=new Map(); map.set(1,"jQuery"); map.set(2,"AngularJS"); map.set(3,"Bootstrap"); var itr=map.values(); document.writeln(itr.next().value+"<br>"); document.writeln(itr.next().value+"<br>");

We will be creating a Map object here and use it in the whole example. var myMap = new Map(); var key1 = "key1",key2="key2",key3="key3"; myMap. set(key1, "value associated with key1"); myMap. set(key2, 'value associated with key2'); myMap. set(key3, 'value associated with key3'); console. log(myMap. ... console. ... console.

How to iterate a Map in Javascript - Map Part 2 let map = new Map() map. set("one", "first element"); map. ... for (let [key, value] of map) { console. log(key + " = " + value); } //output // one = first element // two = second element // 3 = third element. map. forEach(function(value, key) { console.

You can retrieve map data using the following methods: get(K) - returns the value associated with the specified key. values() - returns a collection of all values in the map. keySet() - returns a set of all keys in the map. entrySet() - returns a set of all key/value pairs in the map. containsKey() and map.

Let's see a simple example of values() method. <script> var map=new Map(); map.set(1,"jQuery"); map.set(2,"AngularJS"); map.set(3,"Bootstrap"); var itr=map.values(); document.writeln(itr.next().value+"<br>"); document.writeln(itr.next().value+"<br>");

Use Array from() method with values() method to get the get all values from JavaScript map object. This solution will return a array with maps object element values. The Array. from method creates a new array from an iterable object.