[Chapter 5] Inaccurate implementation of the slice function

[ahmadalfy]

Earlier in chapter 5 about Arrays, it was mentioned that passing no argument to the slice function returns a copy of the array. So if we tried to do:

var array = [1, 2, 3];
console.log(array.slice() === array); // this will return false

While in your example here you are returning the array itself so:

var array = [1, 2, 3];
console.log(arraySlice(array) === array); // this will return true

I think it should be replaced by:

    if (!beginIndex && !endIndex) {
        return Array.from(array);
    }