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Using a dispatch_once singleton model in Swift
...e behaviour is not undefined, it is just broken in a well-defined way: the block will always execute.
– Michael
Jun 10 '14 at 10:54
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Equivalent of String.format in jQuery
...ve all the fancy number formatting stuff, obviously. blog.stevex.net/index.php/string-formatting-in-csharp
– Nosredna
Jun 24 '09 at 15:09
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Best way to work with transactions in MS SQL Server Management Studio
...ou want to incorporate error handling you can do so by using a TRY...CATCH BLOCK. Should an error occur you can then rollback the tranasction within the catch block.
For example:
USE AdventureWorks;
GO
BEGIN TRANSACTION;
BEGIN TRY
-- Generate a constraint violation error.
DELETE FROM Prod...
Comparing Timer with DispatcherTimer
...ould stick to Dispatcher Timer, and then do your WORK (which is what could block your UI) in another thread, using something like a BackgroundWorker. The timers really should never block your UI, unless you're doing "too much" work in their event handler.
– Reed Copsey
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How to affect other elements when one element is hovered
... hovers over #light somewhere inside #explainBox
set display to inline-block for #light directly inside of #definitions.*/
#explainBox #light:hover~#definitions>#light {
display: inline-block;
}
.def {
display: none;
}
#definitions {
background-color: black;
position: fixed;
/*po...
How to discard local changes in an SVN checkout?
...
Just use the svn revert command, for example:
svn revert some_file.php
It is (as every other svn command) well documented in the svnbook resource or man page, or even with the svn help command.
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Assign output of os.system to a variable and prevent it from being displayed on the screen [duplicat
...ne("cat /etc/services")
print cmdline('ls')
print cmdline('rpm -qa | grep "php"')
print cmdline('nslookup google.com')
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Prevent users from submitting a form by hitting Enter
...t).is('textarea') to the condition, or else newlines inside a textarea are blocked (in IE at least).
– Flash
Aug 8 '12 at 6:47
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Regular expression to match balanced parentheses
...o at regex101; The pattern is pasted at (?R) which represents (?0).
Perl, PHP, Notepad++, R: perl=TRUE, Python: Regex package with (?V1) for Perl behaviour.
Ruby using subexpression calls.
With Ruby 2.0 \g<0> can be used to call full pattern.
\((?>[^)(]+|\g<0>)*\)
Demo at Rubu...
Can media queries resize based on a div element instead of the screen?
..., each made up of three orange divs labelled a, b and c.
The second two's blocks display vertically, because they are limited on horizontal room, while the top components 3 blocks are laid out horizontally.
It uses the flex-basis CSS property and CSS Variables to create this effect.
.panel{
d...