I'<em>mem> originally a Java progra<em>mem><em>mem>er who now works with Objective-C. I'd like to create an abstract class, but that doesn't appear to be possible in Objective-C. Is this possible? ...

I have a <em>mem>odel with possibly thousands of objects. I was wondering what would be the <em>mem>ost efficient way of storing the<em>mem> and retrieving a single object once I have it's id. The id's are long nu<em>mem>bers. ...

Consider the following exa<em>mem>ple. 26 Answers 26 ...

I'<em>mem> not talking about pointers to const values, but const pointers the<em>mem>selves. 17 Answers ...

We use GSLB for geo-distribution and load-balancing. Each service is assigned a fixed do<em>mem>ain na<em>mem>e. Through so<em>mem>e DNS <em>mem>agic, the do<em>mem>ain na<em>mem>e is resolved into an IP that's closest to the server with least load. For the load-balancing to work, the application server needs to honor the TTL fro<em>mem> DNS respo...

I a<em>mem> looking for a nice-cocoa way to serialize an NSData object into a hexadeci<em>mem>al string. The idea is to serialize the deviceToken used for notification before sending it to <em>mem>y server. ...

What does the % in a calculation? I can't see<em>mem> to work out what it does. 19 Answers ...

When should a double indirection be used in C? Can anyone explain with a exa<em>mem>ple? 18 Answers ...

I'<em>mem> looking to get the result of a co<em>mem><em>mem>and as a variable in a Windows batch script (see how to get the result of a co<em>mem><em>mem>and in bash for the bash scripting equivalent). A solution that will work in a .bat file is preferred, but other co<em>mem><em>mem>on windows scripting solutions are also welco<em>mem>e. ...

Why is volatile needed in C? What is it used for? What will it do? 18 Answers 18 ...