Building a Map from 2 arrays of values and keys in JavaScript
https://www.tutorialspoint.com/building-a-map-from-2-arrays-of-values-and-keys-in-javascript
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Building a Map from 2 arrays of values and keys in JavaScript
Suppose, we have two arrays −
const keys = [0, 4, 2, 3, 1]; const values = ["first", "second", "third", "fourth", "fifth"];
We are required to write a JavaScript function that takes in the keys and the values array and maps the values to the corresponding keys. The output should be −
const map = { 0 => 'first', 4 => 'second', 2 => 'third', 3 => 'fourth', 1 => 'fifth' };
Example
Following is the code −
const keys = [0, 4, 2, 3, 1]; const values = ["first", "second", "third", "fourth", "fifth"]; const buildMap = (keys, values) => { const map = new Map(); for(let i = 0; i < keys.length; i++){ map.set(keys[i], values[i]); }; return map; }; console.log(buildMap(keys, values));
Output
This will produce the following output in console −
Map(5) { 0 => 'first', 4 => 'second', 2 => 'third', 3 => 'fourth', 1 => 'fifth' }
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