function remove(array, iterate) {
let len = array.length >>> 0;
let idx = 0;
let result = [];
while(len-- > 0){
if(iterate(array[len])){
result[idx++] = array[len];
array.splice(len,1)
}
}
return result;
}
var array = [1, 2, 3, 4];
var evens = remove(array, function(n) {
return n % 2 == 0;
});
console.log(array);
console.log(evens);