// Using the .unshift() method
const reverseArray = arr => {
let reversed = [];
for (let i = 0; i < arr.length; i++) {
reversed.unshift(arr[i]);
}
return reversed
}
if we want to reverse order the last element will become the first.How can this method reverse the order when it starts at first index?
Based on this:
The unshift() method adds new items to the beginning of an array, and returns the new length
So in each iteration you are adding item to the beginning of an array and when iteration is done you have reversed array.
"array.unshift()" is use to push items into array, you need to use "array.reverse()" to reverse the array.
const arr = [1, 2, 3];
arr.unshift(4, 5);
console.log(arr);
// reverse
arr.reverse(arr, "this is unshift");
console.log(arr, "this is reverse");
// output: arr [4, 5, 1, 2, 3]
reverse also in Codecademy, the question is, how unshift can reverse an array.
unshiftalways adds to the first index, that's how.reversedarray. This produced an array with the elements in reverse order from the original.reversedArray = [...originalArray].reverse()does the job too