# Jump to Song 500: Arrays

Find out why a music app jumps to song 500 in one step however long the playlist is, while adding a song at the top gets slower as the playlist grows, and meet the structure behind both: the array.

![Cheat sheet: Jump to Song 500: Arrays](https://fsdtrainingmedia.blob.core.windows.net/public/images/2026/11/e53d7110abcf43a59bf30f977b8789ba.webp)

- Category: Data Structures
- Level: Apprentice
- Tags: Array (data-structures), Constant Time, data structures, Linear Time
- Updated: November 3, 2026

Source: https://www.ask-codey.com/cheat-sheets/ds-arrays-cheat-sheet