Question

How to add multiple key value pairs to map in Node.js

Answer 1

const mp = new Map([
  ['JavaScript', 4],
  ['TypeScript', 3],
  ['Node.js', 2],
]);
    
console.log([...mp.entries()]);
   
mp.set('c++', 354)
  .set('c', 829)
  .set('python', 123);    
    
console.log([...mp.entries()]);


    
    
/*
run:
    
[ [ 'JavaScript', 4 ], [ 'TypeScript', 3 ], [ 'Node.js', 2 ] ]
[
  [ 'JavaScript', 4 ],
  [ 'TypeScript', 3 ],
  [ 'Node.js', 2 ],
  [ 'c++', 354 ],
  [ 'c', 829 ],
  [ 'python', 123 ]
]
    
*/

 

70+ SQL courses for beginners and professionals