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How to correctly use the extern keyword in C
...a pitfall:
File stdio.h:
int errno;
/* other stuff...*/
myCFile1.c:
#include <stdio.h>
Code...
myCFile2.c:
#include <stdio.h>
Code...
If myCFile1.o and myCFile2.o are linked, each of the c files have separate copies of errno. This is a problem as the same errno is supposed...
What generates the “text file busy” message in Unix?
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Here's a super quick reproducer: echo -e '#include <unistd.h>\nint main(void){sleep (5);return 0;}' > slowprog.c && cc slowprog.c && cp a.out b.out && (./a.out &) ; sleep 1 && cp b.out a.out. Produced the error message "cp:...
How do I remove the old history from a git repository?
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Oldest
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PHP: Storing 'objects' inside the $_SESSION
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please edit your answer to include all these comments. it's easier to read and better for the wiki and anyways I can't chose your answer as the accepted one, if everything important is in the comments. thanks!
– markus
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PHP Function with Optional Parameters
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In PHP 5.6 and later, argument lists may include the ... token to denote that the function accepts a variable number of arguments. The arguments will be passed into the given variable as an array; for example:
Example Using ... to access variable arguments
<?ph...
C++ obtaining milliseconds time on Linux — clock() doesn't seem to work properly
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#include <sys/time.h>
#include <stdio.h>
#include <unistd.h>
int main()
{
struct timeval start, end;
long mtime, seconds, useconds;
gettimeofday(&start, NULL);
usleep(2000);
gett...
Dynamically creating keys in a JavaScript associative array
...notation) to avoid the overhead of having .length, .slice(), etc which are included in the Array prototype
– bjornl
Nov 30 '10 at 17:43
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Why are there two ways to unstage a file in Git?
... to-be-removed
#
# Untracked files:
# (use "git add <file>..." to include in what will be committed)
#
# to-be-added
no changes added to commit (use "git add" and/or "git commit -a")
git reset HEAD (without -q) gives a warning about the modified file and its exit code is 1 which will be...
What does the red exclamation point icon in Eclipse mean?
... appear. I copied a directory from one project to another. This directory included a hidden .svn directory (the original project had been committed to version control). When I checked my new project into SVN, the copied directory still contained the old SVN information, incorrectly identifying itse...
Expand Python Search Path to Other Source
...call my main script, this works. HOWEVER, I wanted to test each module by including a main() in each, and calling each directly, as:
python modules/report.py
Now Python complains that it can't find "a module called modules". The key here is that, by default, Python includes the folder of the sc...