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var baseToString = require('../internal/baseToString'),
charsLeftIndex = require('../internal/charsLeftIndex'),
isIterateeCall = require('../internal/isIterateeCall'),
trimmedLeftIndex = require('../internal/trimmedLeftIndex');
/**
* Removes leading whitespace or specified characters from `string`.
*
* @static
* @memberOf _
* @category String
* @param {string} [string=''] The string to trim.
* @param {string} [chars=whitespace] The characters to trim.
* @param- {Object} [guard] Enables use as a callback for functions like `_.map`.
* @returns {string} Returns the trimmed string.
* @example
*
* _.trimLeft(' abc ');
* // => 'abc '
*
* _.trimLeft('-_-abc-_-', '_-');
* // => 'abc-_-'
*/
function trimLeft(string, chars, guard) {
var value = string;
string = baseToString(string);
if (!string) {
return string;
}
if (guard ? isIterateeCall(value, chars, guard) : chars == null) {
return string.slice(trimmedLeftIndex(string));
}
return string.slice(charsLeftIndex(string, (chars + '')));
}
module.exports = trimLeft;
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