: Transforms every item in an array and returns a new one.
: Arrays allocate a solid block of memory where each element is placed right next to the previous one. This allows the computer to calculate the location of any item instantly. : Transforms every item in an array and returns a new one
: Removing or adding elements at the beginning is slower because the computer must shift every other item to a new position. : Transforms every item in an array and returns a new one
