var isSpace = require('./isSpace');

/**
 * Used by `_.trim` and `_.trimRight` to get the index of the last non-whitespace
 * character of `string`.
 *
 * @private
 * @param {string} string The string to inspect.
 * @returns {number} Returns the index of the last non-whitespace character.
 */
function trimmedRightIndex(string) {
  var index = string.length;

  while (index-- && isSpace(string.charCodeAt(index))) {}
  return index;
}

module.exports = trimmedRightIndex;