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Combine multiple Collections into a single logical Collection?
...ects in the lists aren't copied and ArrayList just allocates the space and calls System.arraycopy() under the hood. Can't get much more efficient than that.
– Qwerky
Feb 4 '11 at 10:21
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Cleanest way to toggle a boolean variable in Java?
...heBoolean = theBoolean ? false : true;
Extra: Toggle and use in a method call
theMethod( theBoolean ^= true );
Since the assignment operator always returns what has been assigned, this will toggle the value via the bitwise operator, and then return the newly assigned value to be used in the met...
UICollectionView auto scroll to cell at IndexPath
...sing an initialScrollDone flag as LenK has done since this method will get called more than once and if you call scrollToItemAtIndexPath: more than once it seems to render the collectionView unscrollable(iOS simulator iPhone 5/iOS 8)
– maz
Oct 20 '14 at 5:19
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XMLHttpRequest status 0 (responseText is empty)
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The cause of your problems is that you are trying to do a cross-domain call and it fails.
If you're doing localhost development you can make cross-domain calls - I do it all the time.
For Firefox, you have to enable it in your config settings
signed.applets.codebase_principal_support = true
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Can I browse other people's (Apple) bug reports? [closed]
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As other people have said here, you can't see the bugs that other people have reported to Apple. However, I recently read that Apple uses multiple bug reports for the same issue as an indicator of the severity or priority of a bug or request (see t...
Is not an enclosing class Java
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This answer was really helpful, I never knew you could call new twice in a row (and I've done java for 8+ years!)
– PaulBGD
Sep 13 '15 at 0:58
1
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When to throw an exception?
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In linguistics this is sometimes called presupposition failure. The classic example is due to Bertrand Russell: "Is the King of France bald" can't be answered yes or no, (resp. "The King of France is bald" is neither true nor false), because it contains a fa...
How do you do Impersonation in .NET?
...easy
WindowsIdentity.Impersonate Method (check out the code samples)
Basically you will be leveraging these classes that are out of the box in the .NET framework:
WindowsImpersonationContext
WindowsIdentity
The code can often get lengthy though and that is why you see many examples like the o...
node.js remove file
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You can call fs.unlink(path, callback) for Asynchronous unlink(2) or fs.unlinkSync(path) for Synchronous unlink(2).
Where path is file-path which you want to remove.
For example we want to remove discovery.docx file from c:/book ...
What is the JUnit XML format specification that Hudson supports?
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I did a similar thing a few months ago, and it turned out this simple format was enough for Hudson to accept it as a test protocol:
<testsuite tests="3">
<testcase classname="foo1" name="ASuccessfulTest"/>
&...