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define(['./eq'], function(eq) {
  /**   * Gets the index at which the `key` is found in `array` of key-value pairs.   *   * @private   * @param {Array} array The array to inspect.   * @param {*} key The key to search for.   * @returns {number} Returns the index of the matched value, else `-1`.   */  function assocIndexOf(array, key) {    var length = array.length;    while (length--) {      if (eq(array[length][0], key)) {        return length;      }    }    return -1;  }
  return assocIndexOf;});