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Maps in JavaScript takes keys and values array and maps the values to the corresponding keys
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.
Therefore, the output should look like −
const map = {
0 => 'first',
4 => 'second',
2 => 'third',
3 => 'fourth',
1 => 'fifth'
};Therefore, let’s write the code for this function −
Example
The code for this will be −
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
The output in the console will be −
Map(5) {
0 => 'first',
4 => 'second',
2 => 'third',
3 => 'fourth',
1 => 'fifth'
}
Updated on: 21-Oct-2020
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