Elements in Arrays

Adding elements to arrays

Adding and removing elements are implemented with methods we already know: push and pop. These methods perform operations with the tail of an array, meaning they add an element to the end, and remove it from the end. It looks like a stack of plates, where we can push and pop from the top.

However, there are unshift and shift methods that do the same, but with the head of an array:

• unshift is similar to push
• shift is similar to pop

The metaphor here could be that the shift shifts elements and returns the one that doesn’t fit.