javascript - Compare array js -


this question has answer here:

i have following 

var = [4,6,12]; var b = [4,6];  (var = 0; < a.length; i++) {     (var j = 0; j < b.length; j++) {        if (a[i] !== b[j]) {          a.pop();        }     } }

i want compare 2 , remove 12 if not found in b. not want create new array result remove a.

however, if console log empty.

the reason why a coming out empty because of double loop. you're comparing each element of a every other element of b. when hit a[0] == b[1], obviously, 4 != 6 pop it.


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