Question

How to sort a map by key in descending order with JavaScript

Answer 1

function print(mp) {
  for (let [key, value] of mp) {
      console.log(key, value);            
  }
}

let mp = new Map([
  ['JavaScript', 4],
  ['TypeScript', 3],
  ['C++',1],
  ['Node.js', 2],
]);

mp = new Map([...mp].sort().reverse());

print(mp);
  
console.log([...mp]);
  
  
  
  
/*
run:
  
"TypeScript", 3
"Node.js", 2
"JavaScript", 4
"C++", 1

[["TypeScript", 3], ["Node.js", 2], ["JavaScript", 4], ["C++", 1]]
  
*/

 

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