Manipulating arrays in code is a very common operation. Whether you are creating a total for a shopping cart, grabbing only the first names out of a list of people, or moving a piece on a chessboard, ...

Manipulating arrays in code is a very common operation. Whether you are creating a total for a shopping cart, grabbing only the first names out of a list of people, or moving a piece on a chessboard, ...

Learn how JavaScript’s built-in functions like map() and filter(), as well as compose() and chain(), support a more elegant handling of JavaScript arrays.