Question

How to add key value pair to map in Node.js

Answer 1

const mp = new Map([
  ['JavaScript', 4],
  ['TypeScript', 3],
  ['Node.js', 2],
]);
    
console.log([...mp.entries()]);
   
mp.set('python', 354);

console.log([...mp.entries()]);


    
    
/*
run:
    
[ [ 'JavaScript', 4 ], [ 'TypeScript', 3 ], [ 'Node.js', 2 ] ]
[
  [ 'JavaScript', 4 ],
  [ 'TypeScript', 3 ],
  [ 'Node.js', 2 ],
  [ 'python', 354 ]
]
    
*/

 

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