readme.md

rotate-array

Installation

yarn add @bgoodman/rotate-array

Usage

Import package

import rotateArray from "@bgoodman/rotate-array";

Run tests

yarn test

API

rotateArray

Rotate a 1D or 2D array by n steps. Use n < 0 for left rotations and n > 0 for right rotations.

Throws error if attempting to rotate a jagged array.

rotateArray: <T>(array: Array<T> | Array<Array<T>>, steps: number) => Array<T> | Array<Array<T>>

Example

• rotate a 1D array right

rotateArray([1,2,3,4], 1)
//[4,1,2,3]

• Rotate a 1D array left

rotateArray([1,2,3,4], -1)
//[2,3,4,1]

• Rotate a 2D array right

rotateArray([[1,2,3],[4,5,6],[7,8,9],[10,11,12]], 1)
//([[10,7,4,1], [11,8,5,2], [12,9,6,3]])

• Rotate a 2D array left

rotateArray([[1,2,3],[4,5,6],[7,8,9],[10,11,12]], -1)
//[[3,6,9,12], [2,5,8,11], [1,4,7,10]]