Question

How to create a map with array in JavaScript

Answer 1

function printMap(value, key) {
    console.log(`Key: ${key}, Value: ${value}`);
}

const mp = new Map([
  ['str', 'javascript'],
  ['arr', [34, 67, 89, 10]],
]);

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

mp.forEach(printMap);   
  
console.log(mp.get('arr'));  

console.log(mp.get('arr')[0]);  
console.log(mp.get('arr')[1]);  
console.log(mp.get('arr')[2]);  
console.log(mp.get('arr')[3]);  

console.log(mp.get('arr').length);  

for (let i = 0; i < mp.get('arr').length; i++)
	console.log(mp.get('arr')[i]);



  
/*
run:
  
[["str", "javascript"], ["arr", [34, 67, 89, 10]]]
"Key: str, Value: javascript"
"Key: arr, Value: 34,67,89,10"
[34, 67, 89, 10]
34
67
89
10
4
34
67
89
10
  
*/

 

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