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Simple explanation of MapReduce?

...you want them summed up, you'd write a loop like this A = [7, 8, 9] sum = 0 foreach (item in A) sum = sum + A[item] But, if you have access to a reduce function, you could write it like this A = [7, 8, 9] sum = A.reduce( 0, (x, y) => x + y ) Now it's a little confusing why there are 2 argum...
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Transaction count after EXECUTE indicates a mismatching number of BEGIN and COMMIT statements. Previ

... 110 If you have a TRY/CATCH block then the likely cause is that you are catching a transaction abort...
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How to create PDFs in an Android app? [closed]

... Rubens Mariuzzo 24.7k2323 gold badges109109 silver badges143143 bronze badges answered Dec 30 '10 at 19:28 nikib3ronikib3ro ...
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Create a folder inside documents folder in iOS apps

...UserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; // Get documents folder NSString *dataPath = [documentsDirectory stringByAppendingPathComponent:@"/MyFolder"]; if (![[NSFileManager defaultManager] fileExistsAtPath:dataPath]) [[NSFileManager defaultManager] createDi...
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What is recursion and when should I use it?

... 40 Answers 40 Active ...
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Error 'LINK : fatal error LNK1123: failure during conversion to COFF: file invalid or corrupt' after

I've installed Visual Studio 2012 Release Preview, and it appears to be fine, but now when I try to use Visual Studio 2010 to compile C++ projects, I get the following error message: ...
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View a list of recent documents in Vim

... 203 Don't use a plugin, unless you want a nice menu. From Vim Documentation: Starting (or :help old...
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Exact time measurement for performance testing [duplicate]

...Stopwatch(); sw.Start(); // ... sw.Stop(); Console.WriteLine("Elapsed={0}",sw.Elapsed); share | improve this answer | follow | ...
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How do you print out a stack trace to the console/log in Cocoa?

... | edited Oct 28 '11 at 20:58 logancautrell 8,67233 gold badges3636 silver badges5050 bronze badges ans...
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Open soft keyboard programmatically

...earLayout.getApplicationWindowToken(), InputMethodManager.SHOW_FORCED, 0); But I'm still not able to open this while the activity gets opened, so are there any solution for this? share | impro...