Syntax error Maps in JavaScript takes keys and values array and maps the values to the corresponding keys

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: 2020-10-21T12:22:55+05:30

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