Question

How to create a map in Node.js

Answer 1

let mp = new Map([["typescript", 7], ["javascript", 8], ["nodejs", 5], ["java", 2]])

console.log(mp);

console.log();

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

console.log();

mp.forEach((value, key) => {
    console.log(key, value);
});

console.log();

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


 
 
 
   
/*
run:
        
Map(4) {
  'typescript' => 7,
  'javascript' => 8,
  'nodejs' => 5,
  'java' => 2
}

[
  [ 'typescript', 7 ],
  [ 'javascript', 8 ],
  [ 'nodejs', 5 ],
  [ 'java', 2 ]
]

typescript 7
javascript 8
nodejs 5
java 2

typescript 7
javascript 8
nodejs 5
java 2

*/

 

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