按值删除属性

Question

我有一个这样的对象：

var names = { 45: "Jeff", 145: "Peter", 11: "Dandie", 879: "Michael" }

如何从对象中删除“Peter”？

Answer 1

试试这个

delete names['145'];

或

delete names.145;

Answer 2

代码是不好的做法，键和值的顺序错误。尝试以下方法来实现您的目标：

for(var key of Object.keys(names))
    if(names[key]=='John')
         delete names[key];

没有...：

Object.keys(names).forEach(function(key){
    if(names[key]=='John')
         delete names[keys];
});