lodash/lodash._basepullallby/index.js

/**
 * lodash 4.1.0 (Custom Build) <https://lodash.com/>
 * Build: `lodash modularize exports="npm" -o ./`
 * Copyright 2012-2016 The Dojo Foundation <http://dojofoundation.org/>
 * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
 * Copyright 2009-2016 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
 * Available under MIT license <https://lodash.com/license>
 */

/**
 * A specialized version of `_.map` for arrays without support for iteratee
 * shorthands.
 *
 * @private
 * @param {Array} array The array to iterate over.
 * @param {Function} iteratee The function invoked per iteration.
 * @returns {Array} Returns the new mapped array.
 */
function arrayMap(array, iteratee) {
  var index = -1,
      length = array.length,
      result = Array(length);

  while (++index < length) {
    result[index] = iteratee(array[index], index, array);
  }
  return result;
}

/**
 * The base implementation of `_.indexOf` without `fromIndex` bounds checks.
 *
 * @private
 * @param {Array} array The array to search.
 * @param {*} value The value to search for.
 * @param {number} fromIndex The index to search from.
 * @returns {number} Returns the index of the matched value, else `-1`.
 */
function baseIndexOf(array, value, fromIndex) {
  if (value !== value) {
    return indexOfNaN(array, fromIndex);
  }
  var index = fromIndex - 1,
      length = array.length;

  while (++index < length) {
    if (array[index] === value) {
      return index;
    }
  }
  return -1;
}

/**
 * Gets the index at which the first occurrence of `NaN` is found in `array`.
 *
 * @private
 * @param {Array} array The array to search.
 * @param {number} fromIndex The index to search from.
 * @param {boolean} [fromRight] Specify iterating from right to left.
 * @returns {number} Returns the index of the matched `NaN`, else `-1`.
 */
function indexOfNaN(array, fromIndex, fromRight) {
  var length = array.length,
      index = fromIndex + (fromRight ? 0 : -1);

  while ((fromRight ? index-- : ++index < length)) {
    var other = array[index];
    if (other !== other) {
      return index;
    }
  }
  return -1;
}

/** 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;
}

module.exports = basePullAllBy;