import baseToString from './_baseToString.js'; import baseTrim from './_baseTrim.js'; import castSlice from './_castSlice.js'; import charsEndIndex from './_charsEndIndex.js'; import charsStartIndex from './_charsStartIndex.js'; import stringToArray from './_stringToArray.js'; import toString from './toString.js'; /** * Removes leading and trailing whitespace or specified characters from `string`. * * @static * @memberOf _ * @since 3.0.0 * @category String * @param {string} [string=''] The string to trim. * @param {string} [chars=whitespace] The characters to trim. * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`. * @returns {string} Returns the trimmed string. * @example * * _.trim(' abc '); * // => 'abc' * * _.trim('-_-abc-_-', '_-'); * // => 'abc' * * _.map([' foo ', ' bar '], _.trim); * // => ['foo', 'bar'] */ function trim(string, chars, guard) { string = toString(string); if (string && (guard || chars === undefined)) { return baseTrim(string); } if (!string || !(chars = baseToString(chars))) { return string; } var strSymbols = stringToArray(string), chrSymbols = stringToArray(chars), start = charsStartIndex(strSymbols, chrSymbols), end = charsEndIndex(strSymbols, chrSymbols) + 1; return castSlice(strSymbols, start, end).join(''); } export default trim;