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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.// This module is browser compatible.
/** * Generates sliding views of the given array of the given size and returns a * new array containing all of them. * * If step is set, each window will start that many elements after the last * window's start. (Default: 1) * * If partial is set, windows will be generated for the last elements of the * collection, resulting in some undefined values if size is greater than 1. * * @example * ```ts * import { slidingWindows } from "https://deno.land/std@$STD_VERSION/collections/sliding_windows.ts"; * import { assertEquals } from "https://deno.land/std@$STD_VERSION/assert/assert_equals.ts"; * const numbers = [1, 2, 3, 4, 5]; * * const windows = slidingWindows(numbers, 3); * assertEquals(windows, [ *   [1, 2, 3], *   [2, 3, 4], *   [3, 4, 5], * ]); * * const windowsWithStep = slidingWindows(numbers, 3, { step: 2 }); * assertEquals(windowsWithStep, [ *   [1, 2, 3], *   [3, 4, 5], * ]); * * const windowsWithPartial = slidingWindows(numbers, 3, { partial: true }); * assertEquals(windowsWithPartial, [ *   [1, 2, 3], *   [2, 3, 4], *   [3, 4, 5], *   [4, 5], *   [5], * ]); * ``` */export function slidingWindows<T>(  array: readonly T[],  size: number,  { step = 1, partial = false }: {    /**     * If step is set, each window will start that many elements after the last     * window's start.     *     * @default {1}     */    step?: number;    /**     * If partial is set, windows will be generated for the last elements of the     * collection, resulting in some undefined values if size is greater than 1.     *     * @default {false}     */    partial?: boolean;  } = {},): T[][] {  if (    !Number.isInteger(size) || !Number.isInteger(step) || size <= 0 || step <= 0  ) {    throw new RangeError("Both size and step must be positive integer.");  }
  /** length of the return array */  const length = Math.floor((array.length - (partial ? 1 : size)) / step + 1);
  const result = [];  for (let i = 0; i < length; i++) {    result.push(array.slice(i * step, i * step + size));  }  return result;}