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How to concatenate twice with the C preprocessor and expand a macro as in “arg ## _ ## MACRO”?
...VARIABLE)
extern void NAME(mine)(char *x);
$ gcc -E xx.c
# 1 "xx.c"
# 1 "<built-in>"
# 1 "<command-line>"
# 1 "xx.c"
extern void mine_3(char *x);
$
Two levels of indirection
In a comment to another answer, Cade Roux asked why this needs two levels of indirection. The flippant a...
Sort array by firstname (alphabetically) in Javascript
...st argument is less than second (should be placed before the second in resulting array)
something positive if first argument is greater (should be placed after second one)
0 if those two elements are equal.
In our case if two elements are a and b we want to compare a.firstname and b.firstname
Ex...
How do you remove a specific revision in the git history?
...
Start it with the oldest commit you want to retain as-is:
git rebase -i <after-this-commit>
An editor will be fired up with all the commits in your current branch (ignoring merge commits), which come after the given commit. You can reorder the commits in this list to your heart's content, a...
What is the `data-target` attribute in Bootstrap 3?
... to the HTML Element that will be changed.
Modal Example Code from BS3:
<!-- Button trigger modal -->
<button class="btn btn-primary btn-lg" data-toggle="modal" data-target="#myModal">
Launch demo modal
</button>
<!-- Modal -->
<div class="modal fade" id="myModal" tab...
Git is ignoring files that aren't in gitignore
...xtension is not ignored, but the whole directory.
The returned format is:
<source> <COLON> <linenum> <COLON> <pattern> <HT> <pathname>
Or use the following command to print your .gitignore in user HOME and repository folder:
cat ~/.gitignore "$(git rev-par...
“Cannot start compilation: the output path is not specified for module…”
...Module... and create a Java module, the output path should get set by default.
– J Woodchuck
Aug 19 '19 at 16:50
If th...
Generate .pem file used to set up Apple Push Notifications
... the password or enter a password you desire.
Step 9: Now the most difficult part - open "Terminal" on your Mac, and run the following commands:
cd
cd Desktop
openssl pkcs12 -in pushcert.p12 -out pushcert.pem -nodes -clcerts
Step 10: Remove pushcert.p12 from Desktop to avoid mis-uploading it to ...
iOS 7 - Status bar overlaps the view
...
Xcode 5 has iOS 6/7 Deltas which is specifically made to resolve this issue. In the storyboard, I moved my views 20 pixels down to look right on iOS 7 and in order to make it iOS 6 compatible, I changed Delta y to -20.
Since my storyboard is ...
How do I split a string with multiple separators in javascript?
How do I split a string with multiple separators in JavaScript? I'm trying to split on both commas and spaces but, AFAIK, JS's split function only supports one separator.
...
How do I replace a git submodule with another repo?
...e the new URL
Delete the submodule folder in the repo rm -rf .git/modules/<submodule>
Delete the submodule folder in the working directory rm -rf <submodule>
Run git submodule sync
Run git submodule update
More complete info can be found elsewhere:
Changing remote repository for a gi...