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  • jquery遍历数组、对象

    1,for循环:

    var arr = new Array(13.5,3,4,5,6);
    for(var i=0;i<arr.length;i++){
     arr[i] = arr[i]/2.0;
    }
    

    2,for,in循环:

    var x
    var mycars = new Array()
    mycars[0] = "Saab"
    mycars[1] = "Volvo"
    mycars[2] = "BMW"
    for (x in mycars)
    {
      document.write(mycars[x] + "<br />")
    }
    

    2.1for,in 循环遍历对象

    var data = {1: "食品标准物质", 2: "环境标准物质", 3: "职业卫生标准物质", 4: "仪器鉴定标准物质", 5: "药典及对照品", 6: "进口标准品", 7: "地质矿产标准物质", 8: "其他标准物质", 9: "化学试剂"};
    for(var i in data){
     console.log(i);//索引
     console.log(data[i]);//值
    }
    

      

    3,each遍历一维数组:

    var arr=new Array();
    arr=["aaa","bbb","ccc"];
    $.each(arr,function(index,value){
         alert(i+"..."+value);
    });
    

    3.1each遍历对象:

    var data = {1: "食品标准物质", 2: "环境标准物质", 3: "职业卫生标准物质", 4: "仪器鉴定标准物质", 5: "药典及对照品", 6: "进口标准品", 7: "地质矿产标准物质", 8: "其他标准物质", 9: "化学试剂"};
    $.each(data,function(i,n){
                    console.log('索引' + i + ';对应值为:' + n +';');
                });
    

      

    4,each遍历二维数组:

    $(function () {
        $.each([["aaa", "bbb", "ccc"], ["ddd", "eee", "fff"], ["ggg", "hhh", "iii"]], function (index, item) {
             alert(index + "..." + item);
             //输出0...aaa,bbb,ccc  1...ddd,eee,fff  2...ggg,hhh,iii   这时的index为数组下标,item相当于取这二维数组中的每一个数组
             $.each(item, function (index, itemobj) {
                  alert(index + "....." + itemobj);
             });
        });
         //输出0...aaa,bbb,ccc  0...aaa 1...bbb 2...cccc  1...ddd,eee,fff  0...ddd 1...eee 2...fff  2...ggg,hhh,iii 0...ggg 1...hhh 2...iii
     });
    

      

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  • 原文地址:https://www.cnblogs.com/dayin1/p/11558088.html
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