js运用sort对json 数组进行排序

Array.sort()方法是用来对数组项进行排序的 ，默认情况下是进行升序排列。sort() 方法可以接受一个 方法为参数。

sort()排序时每次比较两个数组项都回执行这个参数，并把两个比较的数组项作为参数传递给这个函数。当函数返回值为1的时候就交换两个数组项的顺序，否则就不交换。

var p = [5, 2, 3, 1, 7, 5, 6, 9, 6, 0];
          function down(a, b) {
              return   (a < b) ? 1 : -1
          }
          p.sort(down)
          alert(p)
 json排序


var p = [
            {name:"kitty", age:12},
            {name:"sonny", age:9},
            {name:"jake", age:13},
            {name:"fun", age:24}
        ]
        function down(x, y) {
            return (x.age < y.age) ? 1 : -1

        }
        p.sort(down)
        var $text = "<div>"
        $.each(p, function (key, value) {
            var $div = "<div>"
            $.each(value, function (key, value) {
                $div += "<span>" + key + ":</span>" + "<span>" + value + "</span>" + "         "
            })
            $div += "</div>"
            $text = $text + $div
        })
        $text += "</div>"



        $(".text").html($text)

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写成类

<script type="text/javascript">
    $(document).ready(function () {
        var p = [
            {name:"kitty", age:12, price:190},
            {name:"sonny", age:9, price:390},
            {name:"jake", age:13, price:42},
            {name:"fun", age:24, price:210}
        ]

        var tablesort = {
            init:function (arry, parm, sortby) {
                this.obj = arry
                this.parm = parm
                this.b = sortby
            },

            sot:function () {
                var $this = this
                var down = function (x, y) {
                    return (eval("x." + $this.parm) > eval("y." + $this.parm)) ? -1 : 1
                }//通过eval对json对象的键值传参
                var up = function (x, y) {
                    return (eval("x." + $this.parm) < eval("y." + $this.parm)) ? -1 : 1
                }
                if (this.b == "down") {
                    this.obj.sort(down)
                }
                else {
                    this.obj.sort(up)
                }

            },//排序

            prin:function () {
                var $text = "<div>"
                $.each(this.obj, function (key, value) {
                    var $div = "<div>"
                    $.each(value, function (key, value) {
                        $div += "<span>" + key + ":</span>" + "<span>" + value + "</span>" + "         "
                    })
                    $div += "</div>"
                    $text = $text + $div
                })
                $text += "</div>"
                $("html body").html($text)
            }//遍历添加dom元素，添加dom
        }

        function _temp() {
            this.init.apply(this, arguments)
        }

        _temp.prototype = tablesort;
        var sort1 = new _temp(p, "price", "down") //建立对象
        sort1.init(p, "age", "up");//初始化参数更改
        sort1.sot()
        sort1.prin()

    })


</script>

 

js运用sort对json 数组进行排序