Function rotate

• Rotate the elements of an array in-place.

• T

Parameters

• array: MutableArrayLike<T>

The mutable array-like object of interest.

• delta: number

The amount of rotation to apply to the elements. A positive value will rotate the elements to the left. A negative value will rotate the elements to the right.

• start: number = 0

The index of the first element in the range to be rotated, inclusive. The default value is `0`. Negative values are taken as an offset from the end of the array.

• stop: number = -1

The index of the last element in the range to be rotated, inclusive. The default value is `-1`. Negative values are taken as an offset from the end of the array.

Linear.

Undefined Behavior

A `delta`, `start`, or `stop` which is non-integral.

Example

``````import { ArrayExt } from '@lumino/algorithm';let data = [0, 1, 2, 3, 4];ArrayExt.rotate(data, 2);        // [2, 3, 4, 0, 1]ArrayExt.rotate(data, -2);       // [0, 1, 2, 3, 4]ArrayExt.rotate(data, 10);       // [0, 1, 2, 3, 4]ArrayExt.rotate(data, 9);        // [4, 0, 1, 2, 3]ArrayExt.rotate(data, 2, 1, 3);  // [4, 2, 0, 1, 3]
``````