json问题小结

json 键值对增加、删除

obj.key='value'; // obj.key=obj[key]=eval("obj."+key);
delete obj.key;

vue中新增和删除属性

this.$set(object,key,value) this.$delete( object, key ) 触发视图更新

遍历键值

for (var key in data) {
    console.log(key+':'+data[key]); //键:值
}
//Vue 中遍历
<li v-for=" (value,key,index) in list">
    {{key}} , {{value}} , {{index}}
</li>
<li v-for=" value in list">
    {{$key}} ,{{value}} , {{$index}}
</li>

获取键值对个数

Object.keys(titleList).length

删除数组中指定元素

var objArray = [‘1’,’2’,’3’,’4’];
objArray.remove(‘1’);
/*定义js数组删除元素*/
Array.prototype.remove = function(val) {
    var index = this.indexOf(val);
    if (index > -1) {
        this.splice(index, 1);
    }
};