Function copyArray

src/shared/functions/toArray.js:464–474

* Copies the values of `source` to `array`. * * @private * @param {Array} source The array to copy values from. * @param {Array} [array=[]] The array to copy values to. * @returns {Array} Returns `array`.

(source, array)

 * @returns {Array} Returns `array`.
 */
function copyArray(source, array) {
  let index = -1;

  const length = source.length;

  array || (array = Array(length));
  while (++index < length) {
    array[index] = source[index];
  }
  return array;
}

/**
 * Gets the native function at `key` of `object`.