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Create unique constraint with null columns

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On delete cascade with doctrine2

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Does Go have “if x in” construct similar to Python?

...ead of an array or slice, like this: visitedURL := map[string]bool { "http://www.google.com": true, "https://paypal.com": true, } if visitedURL[thisSite] { fmt.Println("Already been here.") } share | ...
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Is there any JSON Web Token (JWT) example in C#?

...9-r5mljlln1rd4lrbhg75efgigp36m78j5@developer.gserviceaccount.com","scope":"https://www.googleapis.com/auth/prediction","aud":"https://accounts.google.com/o/oauth2/token","exp":1328554385,"iat":1328550785}"); segments.Add(Base64UrlEncode(headerBytes)); segments.Add(Base64UrlEncode(pa...
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Postgres - FATAL: database files are incompatible with server

... Try this : https://gist.github.com/joho/3735740 It worked perfectly for me. In the end it also generates you 2 bash scripts to check your DB and remove the old cluster. Really Awesome. see: http://www.postgresql.org/docs/9.2/static/pg...
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Creating an abstract class in Objective-C

I'm originally a Java programmer who now works with Objective-C. I'd like to create an abstract class, but that doesn't appear to be possible in Objective-C. Is this possible? ...
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What's the simplest way to test whether a number is a power of 2 in C++?

...or n=0, so if that is possible, you will want to check for it explicitly. http://www.graphics.stanford.edu/~seander/bithacks.html has a large collection of clever bit-twiddling algorithms, including this one. share ...
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Can I have an IF block in DOS batch file?

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jQuery UI: Datepicker set year range dropdown to 100 years

... You can set the year range using this option per documentation here http://api.jqueryui.com/datepicker/#option-yearRange yearRange: '1950:2013', // specifying a hard coded year range or this way yearRange: "-100:+0", // last hundred years From the Docs Default: "c-10:c+10" The...
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Should import statements always be at the top of a module?

...t that's only paid once. Putting the imports within a function will cause calls to that function to take longer. So if you care about efficiency, put the imports at the top. Only move them into a function if your profiling shows that would help (you did profile to see where best to improve perform...