Question

How to convert an array of objects to a map in Node.js

Answer 1

function printMap(value, key) {
    console.log(`${key}, ${value}`);
}
 
const arr = [
  { id: 1, language: 'python' },
  { id: 2, language: 'node.js' },
  { id: 3, language: 'typescript' },
  { id: 4, language: 'php' },
];
 
const mp = new Map(
  arr.map(object => {
        return [object.id, object.language];
  }),
);
 
mp.forEach(printMap);

console.log(mp);
 
   
   
   
   
/*
run:
   
1, python
2, node.js
3, typescript
4, php
Map(4) { 1 => 'python', 2 => 'node.js', 3 => 'typescript', 4 => 'php' }

*/

 

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