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How big should a UIBarButtonItem image be?
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As of iOS 11, the Human Interface Guidelines suggest glyphs be about 25×25 points in toolbars and navigation bars, up to a maximum of about 28 points. (And the HIG should definitely be in your bookmarks if you're working on iOS apps!)
That would translate to ...
How to get the current time in milliseconds from C in Linux?
...include <math.h>
#include <stdio.h>
#include <time.h>
void print_current_time_with_ms (void)
{
long ms; // Milliseconds
time_t s; // Seconds
struct timespec spec;
clock_gettime(CLOCK_REALTIME, &spec);
s = spec.tv_sec;
ms = round(...
RVM is not working in ZSH
...swered Jan 21 '11 at 5:24
intellidiotintellidiot
10.3k44 gold badges3030 silver badges4141 bronze badges
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Why does PostgreSQL perform sequential scan on indexed column?
... for other DBMS as well - some optimizations as "index only scans" taken aside (but for a SELECT * it's highly unlikely such a DBMS would go for an "index only scan")
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getenv() vs. $_ENV in PHP
...m GetEnvironmentVariableA.
If on non-Windows, from the getenv function provided by libc.
As far as I can tell, the only time when it will behave in a case-insensitive manner is on Windows because that's how the Windows environment variable API behaves. If you're on Linux, BSD, Mac, etc then getenv...
How to display hidden characters by default (ZERO WIDTH SPACE ie. ​)
I just lost part of my weekend because of this ... joker - zero width space. I just used some snippets from google groups and didn't recognize that there are doubled characters, because Idea (11) didn't show them, which was causing problems with parsing config file of my app... I discovered it accid...
DESTDIR and PREFIX of make
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In case the ./configure file is not provided, one can still install to user-specific directory using: make prefix=/path/to/your/lib/libaio install
– Good Will
Dec 30 '18 at 22:24
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How do I update zsh to the latest version?
...eful and it's worth fixing whatever problems you're having with it. That said, I don't know that I want to use it to replace Apple's zsh...
– Marnen Laibow-Koser
Dec 3 '13 at 16:00
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jQuery .hasClass() vs .is()
...a comment and four upvotes to very comment. It turns out that what I had said is the correct answer. Here is the result:
http://jsperf.com/hasclass-vs-is-so
The is is multi-purpose, you can for example do is('.class'), is(':checked'), etc which means is has more to do where is hasClass is limited ...
How to make git-diff and git log ignore new and deleted files?
...is already built into git.
I'll leave this answer here since it might provide ideas for things that aren't built into git.
git diff shows new and deleted files by comparing them to /dev/null. It shouldn't be too difficult to write something (I'd use Perl myself) that looks for /dev/null and fil...