lodash/lodash

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        import castSlice from './.internal/castSlice.js'
      
        import charsEndIndex from './.internal/charsEndIndex.js'
      
        import stringToArray from './.internal/stringToArray.js'
      
        const methodName = ''.trimRight ? 'trimRight': 'trimEnd'
      
        /**
      
         * Removes trailing whitespace or specified characters from `string`.
      
         *
      
         * @since 4.0.0
      
         * @category String
      
         * @param {string} [string=''] The string to trim.
      
         * @param {string} [chars=whitespace] The characters to trim.
      
         * @returns {string} Returns the trimmed string.
      
         * @see trim, trimStart
      
         * @example
      
         *
      
         * trimEnd('  abc  ')
      
         * // => '  abc'
      
         *
      
         * trimEnd('-_-abc-_-', '_-')
      
         * // => '-_-abc'
      
         */
      
        function trimEnd(string, chars) {
      
          if (string && chars === undefined) {
      
            return string[methodName]()
      
          }
      
          if (!string || !chars) {
      
            return string
      
          }
      
          const strSymbols = stringToArray(string)
      
          const end = charsEndIndex(strSymbols, stringToArray(chars)) + 1
      
          return castSlice(strSymbols, 0, end).join('')
      
        }
      
        export default trimEnd
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2016	2017	2018