CODEWITHSUNDEEP
javascriptjqueryarrays
chris
chris

Reputation: 36937

trying to work dynamically with object properties in javascript

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

Upvotes: 0

Views: 46

Answers (2)

Mike Christensen
Mike Christensen

Reputation: 91608

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']);

Upvotes: 1

Trevor Dixon
Trevor Dixon

Reputation: 24352

Put the property name string in brackets.

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

Upvotes: 1

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