Jquery ajax 并发请求,返回集中处理

/**
		* @author:caihaibin
		* @desc:用于解决并发请求后的集中处理，如果回调后的有特殊操作，可以在回传参数里做特殊标记，
		* @example:{type:'test',result:''} //<==遍历里有test做特殊处理
		* @demo:
		* majax([ 'test.php', 'test.php?r=23', 'test.php?r=2333',
		*			'test.php?r=233333', 'test.php?test=true' ], function(
		*					responses) {
		*				for ( var index in responses) {
		*					if (responses[index].state == 200) {
		*						console.log(responses[index].result);
		*					}
		*				}
		*			});
		*/
		function majax(requests, recall) {
			var responses = [];
			if (!$.isArray(requests)) {
				recall(responses);
			}
			var responseindex = 0;
			var requestlength = requests.length;
			if (!requestlength) {
				recall(responses);
			}
			for ( var index in requests) {
				$.ajax({
					url : requests[index],
					success : function(result, textStatus) {
						responses[responseindex] = {
							state : 200,
							result : result
						};
						responseindex++;
						if (responseindex == requestlength) {
							recall(responses);
						}
					},
					error : function(obj, textStatus) {
						responses[responseindex] = {
							state : textStatus
						};
						responseindex++;
						if (responseindex == requestlength) {
							recall(responses);
						}
					}
				});
			}
		}

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