for(let a in b) code example
Example: use these instead of a for loop javascript
const array = [1,2,3,4,5];const evenNumbers = array.filter(function(elem) { // expressions that return 'true' are retained return elem % 2 == 0;});const array = [1,2,3,4,5];const evenNumbers = array.filter(function(elem) { // expressions that return 'true' are retained return elem % 2 == 0;});