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Send and receive messages through NSNotificationCenter in Objective-C?
I am attempting to send and receive messages through NSNotificationCenter in Objective-C. However, I haven't been able to find any examples on how to do this. How do you send and receive messages through NSNotificationCenter ?
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Weighted random numbers
I'm trying to implement a weighted random numbers. I'm currently just banging my head against the wall and cannot figure this out.
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gulp command not found - error after installing gulp
I've installed gulp both globally and locally using
39 Answers
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What platforms have something other than 8-bit char?
Every now and then, someone on SO points out that char (aka 'byte') isn't necessarily 8 bits .
12 Answers
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Can someone explain the traverse function in Haskell?
I am trying and failing to grok the traverse function from Data.Traversable . I am unable to see its point. Since I come from an imperative background, can someone please explain it to me in terms of an imperative loop? Pseudo-code would be much appreciated. Thanks.
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Class with single method — best approach?
...ation of helper methods that would otherwise lie around causing redundancy and maintenance hell. They're very easy to use, no instantiation, no disposal, just fire'n'forget. I guess this was my first unwitting attempt at creating a service oriented architecture - lots of stateless services that just...
What exactly does an #if 0 … #endif block do?
...not get executed, it doesn't even get compiled.
#if is a preprocessor command, which gets evaluated before the actual compilation step. The code inside that block doesn't appear in the compiled binary.
It's often used for temporarily removing segments of code with the intention of turning them bac...
Run two async tasks in parallel and collect results in .NET 4.5
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You should use Task.Delay instead of Sleep for async programming and then use Task.WhenAll to combine the task results. The tasks would run in parallel.
public class Program
{
static void Main(string[] args)
{
Go();
}
public static void Go()...
Should I use char** argv or char* argv[]?
I'm just learning C and was wondering which one of these I should use in my main method. Is there any difference? Which one is more common?
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How do I replace NA values with zeros in an R dataframe?
I have a data frame and some columns have NA values.
21 Answers
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