lodash/_basePullAllBy.js

define(['./_arrayMap', './_baseIndexOf'], function(arrayMap, baseIndexOf) {

  /** Used for built-in method references. */
  var arrayProto = Array.prototype;

  /** Built-in value references. */
  var splice = arrayProto.splice;

  /**
   * The base implementation of `_.pullAllBy` without support for iteratee
   * shorthands.
   *
   * @private
   * @param {Array} array The array to modify.
   * @param {Array} values The values to remove.
   * @param {Function} [iteratee] The iteratee invoked per element.
   * @returns {Array} Returns `array`.
   */
  function basePullAllBy(array, values, iteratee) {
    var index = -1,
        length = values.length,
        seen = array;

    if (iteratee) {
      seen = arrayMap(array, function(value) { return iteratee(value); });
    }
    while (++index < length) {
      var fromIndex = 0,
          value = values[index],
          computed = iteratee ? iteratee(value) : value;

      while ((fromIndex = baseIndexOf(seen, computed, fromIndex)) > -1) {
        if (seen !== array) {
          splice.call(seen, fromIndex, 1);
        }
        splice.call(array, fromIndex, 1);
      }
    }
    return array;
  }

  return basePullAllBy;
});