将json对象排序

Question

<script>
var json={s:[{ 
    id:'s2', 
    ss:[ 
        {id:'s2ss1',"字段A":'efg',"字段B":'123'}, 
        {id:'s2ss2',"字段A":'efg',"字段B":'123'} 
        ] 
  },{ 
    id:'s1', 
    ss:[ 
        {id:'s1ss2',"字段A":'efg',"字段B":'123'}, 
        {id:'s1ss1',"字段A":'efg',"字段B":'123'}, 
        ] 
}]} var j=json["s"].sort(function(a,b){return a["id"]>b["id"]?1:-1})
alert(json["s"][0].id);
alert(json["s"][1].id);
</script>

Answer 1

var j=json["s"].sort(function(a,b){return a["id"]>b["id"]?1:-1})
红色部分不需要赋值了
直接这样json["s"].sort(function(a,b){return a["id"]>b["id"]?1:-1})
json就按里面id排好序了

Answer 2

如果有相同ID，要按照原来的顺序，稳定排序就按下面写法：
<script>
var json={s:[{ 
    id:'s2', 
    ss:[ 
        {id:'s2ss1',"字段A":'efg',"字段B":'123'}, 
        {id:'s2ss2',"字段A":'efg',"字段B":'123'} 
        ] 
  },{ 
    id:'s1', 
    ss:[ 
        {id:'s1ss2',"字段A":'efg',"字段B":'123'}, 
        {id:'s1ss1',"字段A":'efg',"字段B":'123'}, 
        ] 
},
{ 
    id:'s2', 
    ss:[ 
        {id:'s1ss3',"字段A":'efg',"字段B":'123'}, 
        {id:'s1ss1',"字段A":'efg',"字段B":'123'}, 
        ] 
}]} json["s"].sort(
function(a,b){return a["id"]>b["id"]?1:a["id"]==b["id"]?0:-1}
 )alert(json["s"][2]["ss"][0].id);
</script>