/**

*

filter() creates a new array with each element in the original

array if and only if the element pass the supplied predicate callback.

The predicate callback is invoked with three arguments:

- the value of the element

- the index of the element

- the Array object being traversed

The predicate callback is expected to return true if the element should

appear in the new array, otherwise false.

You can optionally specify a value to use as `this` in the callback

as the second argument to filter().

If no elements pass the predicate callback, an empty array will be returned

*/

Array.prototype.myFilter = function myFilter(callback, thisArg) {

const newArray = [];

for (let i = 0; i < this.length; i += 1) {

if (callback.call(thisArg, this[i], i, this)) {

newArray.push(this[i]);

}

}

return newArray;

};