given 2 arrays,

var x =[ 1, 3, 4,6,8 9];

var y =[1, 3,4, 9, 4,7];

how do i compare x and y? at the specific index eg x[0] vs y[0], x[1] vs y[1]

to get an output. [1, 3,4]

```
x.filter((e, i) => e === y[i])
```

2 Likes

Kril’s answer is the way to go! If you want a more verbose version, this is the same thing:

```
x.filter(function (e, i) {
return e === y[i];
});
```

1 Like

var a = [1,2,3,5,5, 8];

var b = [1,2,3,7,5, 8]

for(i=0;i<a.length;i++){

if( a[i]==b[i]){}

}

i actually did it this way. it works