Question

How to convert an array of objects to a map in TypeScript

Answer 1

function printMap(value : any , key : any) {
    console.log(`${key}, ${value}`);
}
 
const arr = [
  { id: 1, language: 'c++' },
  { 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, c++" 
"2, node.js"
"3, typescript"
"4, php"
Map (4) {1 => "c++", 2 => "node.js", 3 => "typescript", 4 => "php"} 
   
*/

 

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