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When to use volatile with multi threading?
...riable volatile to prevent the compiler caching the variable in a register and it thus not getting updated correctly.
However two threads both accessing a shared variable is something which calls for protection via a mutex isn't it?
But in that case, between the thread locking and releasing the mut...
Genymotion, “Unable to load VirtualBox engine.” on Mavericks. VBox is setup correctly
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I had the same problem and solved it by running the following command:
sudo /Library/StartupItems/VirtualBox/VirtualBox restart
In later versions, the command is
sudo /Library/Application\ Support/VirtualBox/LaunchDaemons/VirtualBoxStartup.sh ...
How to hide columns in HTML table?
...@Anuraj it should be noted that :first-child etc. are supported > IE 11 and Edge, good one anyway
– Vitaliy Terziev
Jul 26 '17 at 9:41
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How to change text transparency in HTML/CSS?
I'm very new to HTML/CSS and I'm trying to display some text as like 50% transparent. So far I have the HTML to display the text with full opacity
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Get the Query Executed in Laravel 3/4
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Laravel 4+
In Laravel 4 and later, you have to call DB::getQueryLog() to get all ran queries.
$queries = DB::getQueryLog();
$last_query = end($queries);
Or you can download a profiler package. I'd recommend barryvdh/laravel-debugbar, which is pre...
MySQL show status - active or total connections?
...show status like 'Con%' it shows the number of connections, which is 9972 and constantly growing. Is this an active number of connections or connections made in total?
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How to remove css property in jQuery
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You saved my day!
– spycbanda
Jul 21 at 14:38
If a property has been set in a class in a s...
Rake just one migration
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rake db:migrate:redo VERSION=xxxxxxx, but that will run the down and then the up step. You could do this in conjunction with commenting out the down step temporarily.
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Finding Key associated with max Value in a Java Map
...e over the map's entry set, remembering both the "currently known maximum" and the key associated with it. (Or just the entry containing both, of course.)
For example:
Map.Entry<Foo, Bar> maxEntry = null;
for (Map.Entry<Foo, Bar> entry : map.entrySet())
{
if (maxEntry == null || e...
How to scale a UIImageView proportionally?
I have a UIImageView and the objective is to scale it down proportionally by giving it either a height or width.
17 Answer...