使用一个变量对对象进行多级索引

Question

I have an object:

object.day.time

where I need to access the time property.

Due to the nature of the function, I only have access to the base object. IE

function access(property){
    let item = object[property]
    // Do a lot of stuff with item
}

I don't want to rewrite the function because the main use case is accessing objects one level deep. IE the day property. Is there any way I can make this work?

The only thing I could think of was:

property = [['day']['time']]

but that didn't work.

EDIT: I originally had object as a param to access which was wrong. I that case I could just pass object.day as a value

Answer 1

You could do sometime like this to go to this time property:

 var object = { day: { time: (new Date()).getTime() } }; var properties = ["day","time"]; function access(object,properties){ for(var index=0; index < properties.length; index++){ // go to deeper into object until your reached time object = object[properties[index]]; } // here we have reached time and can do something with it or just returning it return object; } console.log(access(object,properties)); 

Hope this helps you.

Answer 2

调用此函数时，传递object.day而不是仅传递基础对象，这意味着函数中的对象已经是object.day，因此，如果执行object.time，则应获取该值。