trying to work dynamically with object properties

问题:

I'm trying to sort out if this is plausible but have gotten syntax errors at best. So I am wondering if it is at all possible.

What I have is an object (example only)

var myObj = {
       something1_max:50,
       something1_enabled:false,
       something1_locked:true,
       something2_max:100,
       something2_enabled:false,
       something2_locked:true,
       something3_max:10,
       something3_enabled:true,
       something3_locked:true
    }

and what I want to do through a function is do something like again for example to sum things up..

function displayDetails(theScope, obj)
{
   console.log(obj.[theScope]_max);
}

(function(){displayDetails('something3', myObj);})()

so when displayDetails() is called whatever the scope I can see in this example the max for that scope. In the console log for the example I would hope to see 10

回答1:

Properties of JavaScript objects can always be accessed as a string using the bracket syntax, ie object['property']. This, of course, means you can build that string dynamically:

console.log(obj[theScope + '_max']);

回答2:

Put the property name string in brackets.

console.log(obj[theScope + '_max']);