js实现将字符串打散为数组(类似php explode函数)

	function explode(delimiter, string, limit) {
			if (arguments.length < 2 ||
				typeof delimiter === 'undefined' ||
				typeof string === 'undefined') {
				return null
			}
			if (delimiter === '' ||
				delimiter === false ||
				delimiter === null) {
				return false
			}
			if (typeof delimiter === 'function' ||
				typeof delimiter === 'object' ||
				typeof string === 'function' ||
				typeof string === 'object') {
				return {
					0: ''
				}
			}
			if (delimiter === true) {
				delimiter = '1'
			}
	
			// Here we go...
			delimiter += ''
			string += ''
	
			var s = string.split(delimiter)
	
			if (typeof limit === 'undefined') return s
	
			// Support for limit
			if (limit === 0) limit = 1
	
			// Positive limit
			if (limit > 0) {
				if (limit >= s.length) {
					return s
				}
				return s
					.slice(0, limit - 1)
					.concat([s.slice(limit - 1)
						.join(delimiter)
					])
			}
	
			// Negative limit
			if (-limit >= s.length) {
				return []
			}
	
			s.splice(s.length + limit)
			return s
	}

参考：http://www.manongjc.com/article/5368.html