javascript - 如何动态创建JavaScript对象？(How to create javascript objects dynamically?)

Question

Is it possible to set javascript objects dynamically?(是否可以动态设置javascript对象？)

I your create objects this way:(我以这种方式创建对象：) let data = {a: {b: 'value'}}; but I need to create it this way:(但是我需要这样创建它：) let data ['a'] ['b'] = 'value'; Object creation will happen within a loop dynamically.(对象创建将在循环内动态发生。) That's why I need the second way.(这就是为什么我需要第二种方式。)   ask by Jobsdev translate from so

Answer 1

You can't in Javascript, because [] operator cannot override in JavaScript.(您无法使用Javascript，因为[]运算符无法在JavaScript中覆盖。)

If you use ruby, you can by following way.(如果使用红宝石，则可以通过以下方式进行。) class MyHash < Hash def [](key) if has_key? key super else self[key] = self.class.new end end end my_hash = MyHash.new my_hash[1][2][3] = "a" puts my_hash => {1=>{2=>{3=>"a"}}} This can be done by "[]" operator overriding.(这可以通过“ []”运算符覆盖来完成。) JavaScript doesn't support "[]" operator overriding.(JavaScript不支持“ []”运算符覆盖。) How would you overload the [] operator in javascript(您如何在javascript中重载[]运算符) Then you should(那你应该) lat data = {} data[a] = data[a] ? data[a] : {} data[a][b] = "value"