47 lines
1.3 KiB
JavaScript
47 lines
1.3 KiB
JavaScript
var baseToString = require('./_baseToString'),
|
|
baseTrim = require('./_baseTrim'),
|
|
castSlice = require('./_castSlice'),
|
|
charsEndIndex = require('./_charsEndIndex'),
|
|
charsStartIndex = require('./_charsStartIndex'),
|
|
stringToArray = require('./_stringToArray'),
|
|
toString = require('./toString');
|
|
|
|
/**
|
|
* 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('');
|
|
}
|
|
|
|
module.exports = trim;
|