Method constructor

data_structures/unstable_2d_array.ts:114–143

implementation * TODO(kt3k): Remove this jsdoc when the issue below is resolved. * https://github.com/denoland/deno/issues/30037 * * @param widthOrValue The width of the 2d array, or the array to use * @param heightOrInitialValue The height of the 2d array, or the initial value to use

(
    widthOrValue: number | (readonly T[][]),
    heightOrInitialValue: number | T,
    initialValue?: T,
  )

   * @param initialValue The initial value to use when resizing the
   */
  constructor(
    widthOrValue: number | (readonly T[][]),
    heightOrInitialValue: number | T,
    initialValue?: T,
  ) {
    if (Array.isArray(widthOrValue)) {
      assert((widthOrValue.length) > 0, "Height must be greater than 0");
      assert((widthOrValue[0].length) > 0, "Width must be greater than 0");

      this.raw = [];

      for (let i = 0; i < widthOrValue.length; i++) {
        this.raw.push(widthOrValue[i]!.slice());
      }

      this.initialValue = heightOrInitialValue as T;
    } else {
      assert((widthOrValue as number) > 0, "Width must be greater than 0");
      assert(
        (heightOrInitialValue as number) > 0,
        "Height must be greater than 0",
      );

      this.raw = Array.from(
        { length: heightOrInitialValue as number },
        () => Array(widthOrValue as number).fill(initialValue as number),
      );
      this.initialValue = initialValue!;
    }
  }

  /**
   * Slice the 2D array. Like slice on a normal array, this will create a new D2Array.