rubico/_internal/arrayExtendMap.js

[a]synchronous functional programming

/**
 * @name arrayExtendMap
 *
 * @synopsis
 * ```coffeescript [specscript]
 * any -> value; any -> mapped
 *
 * arrayExtendMap(
 *   array Array<mapped>,
 *   values Array<value>,
 *   valuesIndex number,
 *   valuesMapper value=>mapped,
 * ) -> array
 * ```
 *
 * @description
 * `arrayExtend` while mapping
 */
const arrayExtendMap = function (
  array, values, valuesMapper, valuesIndex,
) {
  const valuesLength = values.length
  let arrayIndex = array.length - 1
  while (++valuesIndex < valuesLength) {
    array[++arrayIndex] = valuesMapper(values[valuesIndex], valuesIndex, array)
  }
  return array
}

module.exports = arrayExtendMap