lodash/split.js

define(['./_baseToString', './_castSlice', './_isIterateeCall', './isRegExp', './_reHasComplexSymbol', './_stringToArray', './toString'], function(baseToString, castSlice, isIterateeCall, isRegExp, reHasComplexSymbol, stringToArray, toString) {

  /** Used as a safe reference for `undefined` in pre-ES5 environments. */
  var undefined;

  /** Used as references for the maximum length and index of an array. */
  var MAX_ARRAY_LENGTH = 4294967295;

  /** Used for built-in method references. */
  var stringProto = String.prototype;

  /* Built-in method references for those with the same name as other `lodash` methods. */
  var nativeSplit = stringProto.split;

  /**
   * Splits `string` by `separator`.
   *
   * **Note:** This method is based on
   * [`String#split`](https://mdn.io/String/split).
   *
   * @static
   * @memberOf _
   * @since 4.0.0
   * @category String
   * @param {string} [string=''] The string to split.
   * @param {RegExp|string} separator The separator pattern to split by.
   * @param {number} [limit] The length to truncate results to.
   * @returns {Array} Returns the new array of string segments.
   * @example
   *
   * _.split('a-b-c', '-', 2);
   * // => ['a', 'b']
   */
  function split(string, separator, limit) {
    if (limit && typeof limit != 'number' && isIterateeCall(string, separator, limit)) {
      separator = limit = undefined;
    }
    limit = limit === undefined ? MAX_ARRAY_LENGTH : limit >>> 0;
    if (!limit) {
      return [];
    }
    string = toString(string);
    if (string && (
          typeof separator == 'string' ||
          (separator != null && !isRegExp(separator))
        )) {
      separator = baseToString(separator);
      if (separator == '' && reHasComplexSymbol.test(string)) {
        return castSlice(stringToArray(string), 0, limit);
      }
    }
    return nativeSplit.call(string, separator, limit);
  }

  return split;
});