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Re: NSSelector<T> - a curiosity
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Re: NSSelector<T> - a curiosity


  • Subject: Re: NSSelector<T> - a curiosity
  • From: Michael Scott <email@hidden>
  • Date: Thu, 08 May 2008 10:01:10 +0800
  • Thread-topic: NSSelector<T> - a curiosity

Title: Re: NSSelector<T> - a curiosity
Thanks Stephanie and Mike.

NSSelector<Void> works fine, and it makes the code clearer.

Any idea while the language has this Void class?  Something to do with void/null/”” Strings?

Cheers
Michael


On 8/5/08 2:55 AM, "Mike Schrag" <email@hidden> wrote:

This compiles, at least ... Good to know.

    NSDictionary<String, Void> a = new NSMutableDictionary<String, Void>();

ms

On May 7, 2008, at 1:37 PM, Stephane Guyot wrote:

Michael,

did you try the type Class Void ? something like Void.Type ?

HTH,
Stephane


Le 7 mai 08 à 09:35, Michael Scott a écrit :

NSSelector<Object> works fine.  But it is a bit wonky.

Perhaps Java should allow 'null' as a type argument.

Probably a bit much to ask just to make an old NextStep class more
consistent.


On 7/5/08 2:11 PM, "Anjo Krank" <email@hidden> wrote:

Try to cheat an use <Object>?

Am 07.05.2008 um 04:12 schrieb Michael Scott:

NSSelector has been generified (generifried?) so that the return
type of the method it calls must be specified as a type parameter.

So,
    NSSelector<String> selector = new
NSSelector<String>(“testMethod”);

Can be used to call the following method which returns a String
(regardless on what class the method resides):

    public String testMethod() {
        return “testing, testing, 1, 2, 3 ...”;
    }

But what if the method returns void?

    public void testMethod2() {
        // do something fab
    }

What type argument should be used to instantiate NSSelector<T>?

Or have I missed something fundamental?

Cheers
Michael Scott



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  • Follow-Ups:
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      • From: Chuck Hill <email@hidden>
References: 
 >Re: NSSelector<T> - a curiosity (From: Mike Schrag <email@hidden>)

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