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Twitter Bootstrap - how to center elements horizontally or vertically

... in early 2013, it should not be used anymore. The proper solution uses offsets. As for other users suggestion there are also native bootstrap classes available like: class="text-center" class="pagination-centered" thanks to @Henning and @trejder ...
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SQLite error 'attempt to write a readonly database' during insert?

...as intended (CentOS 6.3). The specific issue I had encountered was during setup of Graphite. I had triple-checked that the apache user owned and could write to both my graphite.db and its parent directory. But until I "fixed" SELinux, all I got was a stack trace to the effect of: DatabaseError: att...
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How can I select rows with most recent timestamp for each key value?

...ption,tvLastUpdate,tvLastValue,...) The tvLastupdate and tvLastValue are set in a trigger on inserts to the SensorReadings table. I always have direct access to these values without needing to do any expensive queries. This does denormalize slightly. The query is trivial: SELECT idSensor,Descrip...
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Regex empty string or email

... If you are using it within rails - activerecord validation you can set allow_blank: true As: validates :email, allow_blank: true, format: { with: EMAIL_REGEX } share | improve this answe...
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How to send parameters from a notification-click to an activity?

...ferent request IDs when calling PendingIntent.getActivity() in addition to setting FLAG_ACTIVITY_SINGLE_TOP on the Intent and FLAG_UPDATE_CURRENT on the PendingIntent. See stackoverflow.com/questions/7370324/… – schnatterer Jul 27 '14 at 16:55 ...
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Is it possible to await an event instead of another async method?

... as a signal: private SemaphoreSlim signal = new SemaphoreSlim(0, 1); // set signal in event signal.Release(); // wait for signal somewhere else await signal.WaitAsync(); Alternatively, you can use an instance of the TaskCompletionSource<T> Class to create a Task<T> that represent...
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What does $$ mean in the shell?

... Or the person who asked the question should set the higher rated answer below as the accepted answer... – jtimberman Sep 19 '08 at 17:31 7 ...
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How to remove an HTML element using Javascript?

...rentNode.removeChild(elem); return false; } However, that style of setting up event handlers is old-fashioned. You seem to have good instincts in that your JavaScript code is in its own file and such. The next step is to take it further and avoid using onXYZ attributes for hooking up event h...
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Format JavaScript date as yyyy-mm-dd

.... Edit: @exbuddha wrote this to handle time zone in the comments: const offset = yourDate.getTimezoneOffset() yourDate = new Date(yourDate.getTime() + (offset*60*1000)) return yourDate.toISOString().split('T')[0] share ...
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iOS 7.0 No code signing identities found

...I noticed comes from the Team dropdown under the General tab in my project settings. Completely removing that line worked for me if you want the team to be set to None. – JoshA Jan 21 '15 at 6:42 ...