Rub Array Essential

arr = [9, 5, 1, 2, 3, 4, 0, -1]

access index

inclusive and exclusive range

To access the elements from the end of the list, we can use negative indices.

arr = [9, 5, 1, 2, 3, 4, 0, -1]

last element

arr[-1] => -1

or

The last element of the array can be accessed using

FIRST element

The first n elements of the array can be accessed using

Everything but the first n elements of the array can be accessed using

PUSH

push allows one to add an element to the end of the list.

INSERT

insert allows one to add one or more elements starting from a given index (shifting elements after the given index in the process).

UNSHIFT

unshift allows one or more elements to be added at the beginning of the list.

DELETE FROM ARRAY

arr = [5, 6, 5, 4, 3, 1, 2, 5, 4, 3, 3, 3]

Delete an element from the end of the array

Delete an element from the beginning of the array

Delete an element at a given position

Delete all occurrences of a given element

Non-Destructive Selection.

destructive behavior (change to the original array)