Question

How to delete map elements in Node.js

Answer 1

const mp = new Map([
  ['javascript', 1],
  ['nodejs', 2],
  ['typescript', 3],
  ['c++', 4],
  ['c', 5],
  ['python', 6]
]);
 
mp.forEach((value, key) => {
  if (value > 4) {
      mp.delete(key);
  }
});

for (let [key, value] of mp) {
    console.log(key, value);            
}
 
    
    
    
    
/*
run:
    
javascript 1
nodejs 2
typescript 3
c++ 4
    
*/

 

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Answer 2

const mp = new Map([
  ['javascript', 1],
  ['nodejs', 2],
  ['typescript', 3],
  ['c++', 4],
  ['c', 5],
  ['python', 6]
]);
 
mp.delete('javascript');
mp.delete('typescript');

for (let [key, value] of mp) {
    console.log(key, value);            
}
 
    
    
    
    
/*
run:
    
nodejs 2
c++ 4
c 5
python 6
    
*/

 

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