jquery里用each遍历的值存到数组和字符串

 $("img").each(function(){
var a = $(this).attr("src");
});
//遍历后存放到数组中。。要用的时候再根据需要取.
var arr = new Array();
$("img").each(function(index){
    arr.push($(this).attr("src"));
})
 
//调用..
for(var i in arr){
    console.log(arr[i]);
}

 $(".shopcar").each(function () {
                goods_id += $(this).children().find(‘dt‘).attr(‘value‘) + ",";
                goods_number += $(this).children().find(".result").val() + ",";
                return goods_id;
                return goods_number;
            });

        //去掉最后一个逗号
        if (goods_id.length > 0) {
            goods_id = goods_id.substr(0,goods_id.length - 1);
        }
        if (goods_id.length > 0) {
            goods_number = goods_number.substr(0,goods_number.length - 1);
        }