How does the filter function work in js?

Question

var c = newArray(1,2,3,4);
var b = c.filter(function(a){return(a%2)});
alert(b[0]+b[1])
//the answer is 4

Answer 1

http://www.globalnerdy.com/2016/06/23/map-filter-and-reduce-explained-using-emoji/

Answer 2

ThanksTheWhiteCat 😍

Answer 3

Filter method creates new array with elements that pass certain condition. In this case filter the even elements of the array. So b => [1, 3] and b[0]+b[1] is 4. You can find more info here: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/filter. Hope it helps you.

Answer 4

Tahir Usman , you are welcome 😉