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var baseToString = require('./_baseToString'),
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    castSlice = require('./_castSlice'),
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    charsEndIndex = require('./_charsEndIndex'),
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    stringToArray = require('./_stringToArray'),
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    toString = require('./toString');
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/** Used to match leading and trailing whitespace. */
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var reTrimEnd = /\s+$/;
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/**
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 * Removes trailing whitespace or specified characters from `string`.
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 *
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 * @static
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 * @memberOf _
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 * @since 4.0.0
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 * @category String
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 * @param {string} [string=''] The string to trim.
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 * @param {string} [chars=whitespace] The characters to trim.
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 * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
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 * @returns {string} Returns the trimmed string.
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 * @example
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 *
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 * _.trimEnd('  abc  ');
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 * // => '  abc'
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 *
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 * _.trimEnd('-_-abc-_-', '_-');
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 * // => '-_-abc'
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 */
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function trimEnd(string, chars, guard) {
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  string = toString(string);
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  if (string && (guard || chars === undefined)) {
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    return string.replace(reTrimEnd, '');
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  }
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  if (!string || !(chars = baseToString(chars))) {
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    return string;
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  }
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  var strSymbols = stringToArray(string),
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      end = charsEndIndex(strSymbols, stringToArray(chars)) + 1;
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  return castSlice(strSymbols, 0, end).join('');
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}
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module.exports = trimEnd;
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