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Why does my application spend 24% of its life doing a null check?
...npractical. Not in the least because you typically cannot predict in which order the nodes of the tree will be visited. A red-black tree might help, it isn't clear from the question. So a simple conclusion to draw is that it is already running as fast you can hope for. And if you need it to go faste...
How can I handle R CMD check “no visible binding for global variable” notes when my ggplot2 syntax i
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Have you tried with aes_string instead of aes? This should work, although I haven't tried it:
aes_string(x = 'x.values', y = 'y.values')
share
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Is there a way to change the environment variables of another process in Unix?
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Via gdb:
(gdb) attach process_id
(gdb) call putenv ("env_var_name=env_var_value")
(gdb) detach
This is quite a nasty hack and should only be done in the context of a debugging scenario, of course.
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How can I check whether a radio button is selected with JavaScript?
...nd you have HTML like this
<input type="radio" name="gender" id="gender_Male" value="Male" />
<input type="radio" name="gender" id="gender_Female" value="Female" />
For client-side validation, here's some Javascript to check which one is selected:
if(document.getElementById('gender_M...
Why should I use core.autocrlf=true in Git?
...nately, there are many binary files that are not DLLs in my repository: in order to be certain I'd got the correct list of file extensions to add to .gitattributes would require reviewing tens of thousands of files.
– Rich
Jul 31 at 21:34
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Check play state of AVPlayer
...dates the play/pause button appropriately.
@IBAction func btnPlayPauseTap(_ sender: Any) {
if aPlayer.timeControlStatus == .playing {
aPlayer.pause()
btnPlay.setImage(UIImage(named: "control-play"), for: .normal)
} else if aPlayer.timeControlStatus == .paused {
aPlay...
Define global variable in a JavaScript function
...er: There's no reason whatsoever to use eval there. Instead: window[dynamic_variable_name] = dynamic_variable_value;
– T.J. Crowder
Mar 10 '16 at 10:05
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Removing Java 8 JDK from Mac
...is stage, you should see:
% ls /Library/Java/JavaVirtualMachines/
jdk1.7.0_nn.jdk
(and nothing else)
3) In the folder /Library/Java/Extensions/, you'll need to remove all the old jar files, the ones that correspond to other releases of Java. If you don't, you'll get the infamous message about t...
Server.UrlEncode vs. HttpUtility.UrlEncode
.../?#[]@!$&'()*+,;=
And the unreserved characters are alphanumeric and -._~
The Verdict
Uri.EscapeDataString clearly defines its mission: %-encode all reserved and illegal characters. WebUtility.UrlEncode is more ambiguous in both definition and implementation. Oddly, it encodes some reserved char...
What exactly is a C pointer if not a memory address?
...or the same location;
you can't do arithmetic on addresses, and there's no order on them;
the pointer also carries type information.
Going the other way round is far more troublesome. Not everything that looks like an address can be a pointer. Somewhere deep down any pointer is represented as a bi...