/**
 * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>
 * Build: `lodash modularize modern exports="node" -o ./modern/`
 * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>
 * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>
 * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
 * Available under MIT license <http://lodash.com/license>
 */
var baseIndexOf = require('./baseIndexOf'),
    cacheIndexOf = require('./cacheIndexOf'),
    createCache = require('./createCache'),
    largeArraySize = require('./largeArraySize'),
    releaseObject = require('./releaseObject');

/**
 * The base implementation of `_.difference` that accepts a single array
 * of values to exclude.
 *
 * @private
 * @param {Array} array The array to process.
 * @param {Array} [values] The array of values to exclude.
 * @returns {Array} Returns a new array of filtered values.
 */
function baseDifference(array, values) {
  var index = -1,
      indexOf = baseIndexOf,
      length = array ? array.length : 0,
      isLarge = length >= largeArraySize,
      result = [];

  if (isLarge) {
    var cache = createCache(values);
    if (cache) {
      indexOf = cacheIndexOf;
      values = cache;
    } else {
      isLarge = false;
    }
  }
  while (++index < length) {
    var value = array[index];
    if (indexOf(values, value) < 0) {
      result.push(value);
    }
  }
  if (isLarge) {
    releaseObject(values);
  }
  return result;
}

module.exports = baseDifference;