Question

How to iterate over map keys and values in Node.js

Answer 1

const mp = new Map();
 
mp.set('c', 1);
mp.set('cpp', 2);
mp.set('java', 3);
mp.set('nodejs', 4);
 
mp.forEach((value, key) => {
    console.log(`key: ${key} value: ${value}`);
});



/*
run:

key: c value: 1
key: cpp value: 2
key: java value: 3
key: nodejs value: 4

*/

 

70+ SQL courses for beginners and professionals

Answer 2

const mp = new Map();
 
mp.set('c', 1);
mp.set('cpp', 2);
mp.set('java', 3);
mp.set('nodejs', 4);
 
for (const [key, value] of mp) {
    console.log('key:', key, 'value:', value);
}



/*
run:

key: c value: 1
key: cpp value: 2
key: java value: 3
key: nodejs value: 4

*/

 

70+ SQL courses for beginners and professionals