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How to make a variadic macro (variable number of arguments)
...void)0) //strip out PRINT instructions from code
#endif
void print(const char *fmt, ...) {
va_list args;
va_start(args, fmt);
vsprintf(str, fmt, args);
va_end(args);
printf("%s\n", str);
}
int main() {
PRINT("[%s %d, %d] Hello World", "March", 26, 2009);
retur...
How to use '-prune' option of 'find' in sh?
...ge.org/UsingFind)
Just noticed -path is for a path that fully matches the string/path that comes just after find (. in theses examples) where as -name matches all basenames.
find . -path ./.git -prune -o -name file -print
blocks the .git directory in your current directory ( as your finding in...
Python argparse ignore unrecognised arguments
...r "recognized" arguments instead.
parser = argparse.ArgumentParser(prefix_chars='+')
parser.add_argument('+cd')
The same command will produce
Namespace(_unrecognized_args=['--foo', 'BAR', 'a', 'b'], cd='e')
Put that in your pipe and smoke it =)
nJoy!
...
How come a non-const reference cannot bind to a temporary object?
...built-in types (int etc.), but it is allowed for user-defined types: (std::string("A")+"B").append("C").
– sbi
Oct 14 '09 at 16:51
6
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Why are there two kinds of functions in Elixir?
...orm was used in elixir because it still looks like a function call with an extra character. It's close enough to a function call.
I did not think about all the pros and cons, but it looks like in both languages you could get away with just the brackets as long as you make brackets mandatory for ano...
Python assigning multiple variables to same value? list behavior
...n either case, you can rebind a to a different value (e.g., a = "Now I'm a string!"), but the won't affect the original value, which b and c will still be names for. The difference is that with a list, you can change the value [1, 2, 3] into [1, 2, 3, 4] by doing, e.g., a.append(4); since that's act...
sed error: “invalid reference \1 on `s' command's RHS”
...
Sorry. The edit raises the error: sed: -e expression #7, char 58: Invalid range end. @Denis' answer works.
– JJD
May 19 '13 at 18:29
...
How to prevent SIGPIPEs (or handle them properly)
...mple replacing write(...) by send(...,MSG_NOSIGNAL) (see nobar's comment)
char buf[888];
//write( sockfd, buf, sizeof(buf) );
send( sockfd, buf, sizeof(buf), MSG_NOSIGNAL );
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improve thi...
What is your most productive shortcut with Vim?
...can use d/foo to cut from the current line to the next line containing the string "foo" and y?bar to copy from the current line to the most recent (previous) line containing "bar." If I don't want whole lines I can still use the search movements (as statements of their own), drop my mark(s) and use...
If unit testing is so great, why aren't more companies doing it? [closed]
... students are not trained for it.
It's easy when you are writing your own string class. When you are testing a real-life product, you run into challenges that nobody told you about in the powerpoint slides:
User interaction. Half of your application is the user interface logic. How do you test it...