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How to check if a variable is not null?
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This check is actually not safe. If myvar is 0, false or any other falsy value the test will fail (if you only intend to check for not null). So only use this to check for not null if the variable can never have another falsy value.
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Can I hide the HTML5 number input’s spin box?
...e: textfield;
}
In some cases, you may want the spinner to be hidden initially, and then appear on hover/focus. (This is currently the default behavior in Chrome). If so, you can use the following:
input[type="number"] {
-moz-appearance: textfield;
}
input[type="number"]:hover,
input[type="...
import .css file into .less file
...by the browser at runtime ; with (inline), the CSS file's contents are actually imported into the compiled stylesheet, which is what you want if that file is out of your web root for example. Note that the default behaviour when @importing a .css file is the same as with the (css) flag - read the d...
Mapping two integers to one, in a unique and deterministic way
...d for e.g. dovetailing. Have a look at this PDF for an introduction to so-called pairing functions. Wikipedia introduces a specific pairing function, namely the Cantor pairing function:
Three remarks:
As others have made clear, if you plan to implement a pairing function, you may soon find you ...
How to kill a process running on particular port in Linux?
...TIME_WAIT state after the parent process is killed. The OS will then eventually completely close the port after about 60 seconds. It means that you can't reuse the port for at least 60 seconds (unless you give the reuse option to the socket).
– Mark Lakata
Sep ...
How to change string into QString?
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This should actually be avoided in my opinion. If the version of the standard library QT was compiled with is somehow different from what you're compiling with, you're going to have trouble. In creates an unnecessary dependency between QT an...
Why is iostream::eof inside a loop condition (i.e. `while (!stream.eof())`) considered wrong?
...ng iostream::eof in a loop condition is "almost certainly wrong". I generally use something like while(cin>>n) - which I guess implicitly checks for EOF.
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Limit Decimal Places in Android EditText
...sor to the front most of the text". I wish to produce text 12.45, it won't allow.
– Cheok Yan Cheng
Sep 28 '12 at 1:53
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Best Way to read rss feed in .net Using C#
...om/feeds/posts/default?alt=rss" for RSS 2.0. The SyndicationItem item has all the item properties you'll need. Just examine the object in the Visual Studio debugger and be illuminated.
– secretwep
Oct 29 '13 at 3:40
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Focus-follows-mouse (plus auto-raise) on Mac OS X
...defaults write org.x.X11 wm_ffm -bool true
Apparently there's a program called CodeTek Virtual Desktop that'll emulate it systemwide, but it costs $$ (and they never got a version out for OSX Leopard).
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