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
{ {key}} , { {value}} , { {index}}

{ {$key}} ,{ {value}} , { {$index}}

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);}
};