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Xcode 6 beta 2 issue exporting .ipa: “Your account already has a valid iOS distribution certificate”

... is gone. Apple has changed the way of Ad Hoc distribution for developers. Now you can't make Ad Hoc distribution builds using Development Certificate. You need a Distribution Certificate with "Ad Hoc" provisioning profile (not Development Provisioning profile) to make Ad Hoc builds. It's a real pai...
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Search and replace in Vim across all the project files

...looks like 's/pattern/replacement/' is the extension, I think I understand now. – davekaro Feb 23 '13 at 13:29 11 ...
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How do I overload the square-bracket operator in C#?

... +1 for the handy list. FYI the link died. (4 years later, I know) – Mixxiphoid Mar 4 '13 at 21:04 I'd li...
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What's the difference between “git reset” and “git checkout”?

... (so HEAD points to it) and we run git reset master, 'develop' itself will now point to the same commit that 'master' does. On the other hand, if we instead run git checkout master, 'develop' will not move, HEAD itself will. HEAD will now point to 'master'. So, in both cases we're moving ...
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How can I disable ARC for a single file in a project?

...s and mock objects) where the rules of ARC are a little more fragile right now. I recall hearing that there was a way to disable ARC on a per-file basis, though I have been unable to find this option. ...
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Android search with Fragments

Does somebody know of a tutorial or an example of how to implement the standard Android search interface with Fragment s? In other words, is it possible to put a standard search with a SearchManager in a Fragment? ...
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What is the difference between “text” and new String(“text”)?

... If i write: String s = new String("abc"); And now i write: String s = "abc"; Will String s = "abc"; create a new String literal in the String pool? – Kaveesh Kanwal Apr 16 '15 at 18:34 ...
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jQuery equivalent of JavaScript's addEventListener method

... As of jQuery 1.7, .on() is now the preferred method of binding events, rather than .bind(): From http://api.jquery.com/bind/: As of jQuery 1.7, the .on() method is the preferred method for attaching event handlers to a document. For earlier vers...
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git discard all changes and pull from upstream

... git reset <hash> # you need to know the last good hash, so you can remove all your local commits git fetch upstream git checkout master git merge upstream/master git push origin master -f voila, now your fork is back to same as upstream. ...
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How do I set the time zone of MySQL?

... this answer. To get the current timezone offset as TIME SELECT TIMEDIFF(NOW(), UTC_TIMESTAMP); It will return 02:00:00 if your timezone is +2:00. To get the current UNIX timestamp: SELECT UNIX_TIMESTAMP(); SELECT UNIX_TIMESTAMP(NOW()); To get the timestamp column as a UNIX timestamp SELECT...