js loop over map iterator code example

Example 1: js loop trough map

for (let key of map) {
	console.log(key);
}

Example 2: use map to loop through an array

let squares = [1,2,3,4].map(function (val) {  
    return val * val;  
}); 
// squares will be equal to [1, 4, 9, 16]