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Why did my Git repo enter a detached HEAD state?
...eriment without creating a new branch:
git switch --detach HEAD~3
HEAD is now at 9fc9555312 Merge branch 'cc/shared-index-permbits'
it cannot detached by mistake a remote tracking branch
See:
C:\Users\vonc\arepo>git checkout origin/master
Note: switching to 'origin/master'.
You are in 'd...
C: differences between char pointer and array [duplicate]
...ut it's a subtle difference. Essentially, the former:
char amessage[] = "now is the time";
Defines an array whose members live in the current scope's stack space, whereas:
char *pmessage = "now is the time";
Defines a pointer that lives in the current scope's stack space, but that references ...
Swipe to Delete and the “More” button (like in Mail app on iOS 7)
...sForRowAtIndexPath:
- tableView:commitEditingStyle:forRowAtIndexPath:
Known Issues
The documentation says tableView:commitEditingStyle:forRowAtIndexPath is:
"Not called for edit actions using UITableViewRowAction - the action's handler will be invoked instead."
However, the swiping doesn'...
Why did Rails4 drop support for “assets” group in the Gemfile
...ion) like coffee-rails if you are using coffee templates
and the fact that now assets are not precompiled on demand in production anymore.
(not precompiled on demand in production) Means that if you have that gems in production environment in 3.2.x and forget to precompile, Rails will do exactly wha...
Colspan all columns
...ggling with this damned colspan issue at different times for quite a while now
– hndcrftd
May 6 '11 at 17:56
30
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How can I determine whether a 2D Point is within a Polygon?
...s after all), but macOS for example uses float for everything. macOS only knows points and a point can translate to one pixel, but depending on monitor resolution, it might translate to something else. On retina screens half a point (0.5/0.5) is pixel. Still, I never noticed that macOS UIs are signi...
Returning a C string from a function
...ing like "my string" actually uses 9+1 (=10!) bytes. This is important to know when you finally get around to allocating strings dynamically.
So, without this 'terminating zero', you don't have a string. You have an array of characters (also called a buffer) hanging around in memory.
Longevity of ...
Get first and last day of month using threeten, LocalDate
... last day of the current month, this becomes:
LocalDate start = YearMonth.now().atDay(1);
LocalDate end = YearMonth.now().atEndOfMonth();
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Checking if an Android application is running in the background
... activity state is briefly locked down to do the switch) that we actually know for sure what the next thing will be.
And the implementation and global behavior here is not guaranteed to remain the same in the future.
I wish I had read this before I posted an answer on the SO, but hopefully it...
Best way to merge two maps and sum the values of same key?
...
The shortest answer I know of that uses only the standard library is
map1 ++ map2.map{ case (k,v) => k -> (v + map1.getOrElse(k,0)) }
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