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Why is volatile needed in C?
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volatile in C actually came into existence for the purpose of not caching the values of the variable automatically. It will tell the compiler not to cache the value of this variable. So it will generate code to take the value of the given volatile variable from the main memory ev...
socket.error: [Errno 48] Address already in use
...the default port (8000). If you already ran the same module before, it is most likely that process still bound to the port. Try and locate the other process first:
$ ps -fA | grep python
501 81651 12648 0 9:53PM ttys000 0:00.16 python -m SimpleHTTPServer
The command arguments are included...
how to use sed, awk, or gawk to print only what is matched?
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My sed (Mac OS X) didn't work with +. I tried * instead and I added p tag for printing match:
sed -n 's/^.*abc\([0-9]*\)xyz.*$/\1/p' example.txt
For matching at least one numeric character without +, I would use:
sed -n 's/^.*abc\([0...
What is the best way to deal with the NSDateFormatter locale “feechur”?
...Formatter (Locale)
- (id)initWithSafeLocale {
static NSLocale* en_US_POSIX = nil;
self = [self init];
if (en_US_POSIX == nil) {
en_US_POSIX = [[NSLocale alloc] initWithLocaleIdentifier:@"en_US_POSIX"];
}
[self setLocale:en_US_POSIX];
return self;
}
@end
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Difference between static memory allocation and dynamic memory allocation
..., especially if we start considering that the compilation machine and the host machine might not be the same or might not even be on the same architecture.
It may be better to think that the allocation of static memory is handled by the compiler rather than allocated at compile time.
For example...
How to copy Docker images from one host to another without using a repository
...transfer a Docker image from one machine to another one without using a repository, no matter private or public?
15 Answers...
How does the main() method work in C?
...ignatures for main, as well as variable-length argument lists, is one of those features.
Programmers noticed that they can pass extra arguments to a function, and nothing bad happens with their given compiler.
This is the case if the calling conventions are such that:
The calling function cleans...
How do I put an already-running process under nohup?
...er with the jobs command) so that the job isn't killed when the terminal closes.
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What is a classpath and how do I set it?
...let's talk about .class files, packages, and .jar files.
First, let's suppose that MyClass is something you built as part of your project, and it is in a directory in your project called output. The .class file would be at output/org/javaguy/coolframework/MyClass.class (along with every other file ...
How to call Android contacts list?
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I'm not 100% sure what your sample code is supposed to do, but the following snippet should help you 'call the contacts list function, pick a contact, then return to [your] app with the contact's name'.
There are three steps to this process.
1. Permissions
Add a permis...