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What do two question marks together mean in C#?

...e following statement will assign the first non-null Answer# to Answer (if all Answers are null then the Answer is null): string Answer = Answer1 ?? Answer2 ?? Answer3 ?? Answer4; Also it's worth mentioning while the expansion above is conceptually equivalent, the result of each expression is o...
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__FILE__ macro shows full path

....com/pipermail/cmake/2013-January/053117.html I'm copying the tip so it's all on this page: set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -D__FILENAME__='\"$(subst ${CMAKE_SOURCE_DIR}/,,$(abspath $<))\"'") If you're using GNU make, I see no reason you couldn't extend this to your own makefiles. ...
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How to simulate Android killing my process

...tivityA instead. This is what Android docs are saying about that: Normally, the system clears a task (removes all activities from the stack above the root activity) in certain situations when the user re-selects that task from the home screen. Typically, this is done if the user hasn't visited ...
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How to fix Git error: object file is empty?

... the .git directory and run find . -type f -empty -delete -print to remove all empty files. Eventually git started telling me it was actually doing something with the object directories: nathanvan@nathanvan-N61Jq:~/workspace/mcmc-chapter$ git fsck --full Checking object directories: 100% (256/256)...
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How to measure time taken by a function to execute

...ction you're measuring time for var t1 = performance.now() console.log("Call to doSomething took " + (t1 - t0) + " milliseconds.") NodeJs: it is required to import the performance class Using console.time: (non-standard) (living standard) console.time('someFunction') someFunction() // W...
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A simple scenario using wait() and notify() in java

...imple scenario i.e. tutorial that suggest how this should be used, specifically with a Queue? 6 Answers ...
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How do I uninstall a package installed using npm link?

When installing a node package using sudo npm link in the package's directory, how can I uninstall the package once I'm done with development? ...
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How to show the last queries executed on MySQL?

Is there any query/way to show the last queries executed on ALL servers? 10 Answers ...
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Recursively add files by pattern

...t doesn't provide any fancy mechanisms for doing this itself, as it's basically a shell problem: how do you get a list of files to provide as arguments to a given command. share | improve this answe...
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Xcode 5: Code signing entitlement errors

...both rows, however, I saw the "Any iOS SDK" subrows for each configuration all set to None, although the Debug/Release rows did list the proper profile/signing identity. Archiving in this state still gave me the error, until I explicitly set all the "Any iOS SDK" rows to their proper values. ...