Languages like JavaScript and Python use that can grow or shrink as needed. Essential Operations
: Most languages start counting at 0. To access the first item, you use index 0 , the second use 1 , and so on. Fixed vs. Dynamic Size :
: To find a specific value, you typically have to check every item one by one unless the data is already sorted. Helpful Array Methods (JavaScript Focus) Languages like JavaScript and Python use that can
: Using 2D arrays to represent the grid of pixels in a digital photo. Leaderboards : Keeping track of scores in a game.
: Removing or adding elements at the beginning is slower because the computer must shift every other item to a new position. Fixed vs
: Fetching a value by its index is extremely fast ( time complexity).
: A clean way to loop through and perform an action on every element without a traditional for loop. Real-World Examples Media Playlists : Storing an ordered list of songs. Leaderboards : Keeping track of scores in a game
: Creates a new array containing only the items that meet a specific condition.