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String isNullOrEmpty in Java? [duplicate]
...en asked before, but Googling doesn't find it . Is there, in any of the standard java libraries (including apache/google/...), a static isNullOrEmpty() method for Strings ?
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HTML table headers always visible at top of window when viewing a large table
...tThead (demos available) which is very cool, can work with DataTables too, and can even work inside an overflow: auto container.
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Rotating a point about another point (2D)
...onizer exactly the same, just use your point subtraction/addition routines and your vector*matrix function for rotation.
– Nils Pipenbrinck
Oct 2 '17 at 4:37
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How to change a git submodule to point to a subfolder?
...ubmodule, you could always create a new repository that's cloned from boto and then set up a cron job to:
git fetch that repository into a directory
Use git filter-branch to update a branch where the subdirectory is at the top level.
Add that branch of the repository as the submodule. However,...
How can I get the baseurl of site?
... edited Sep 14 '11 at 14:14
Andomar
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answered Sep 14 '11 at 8:39
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Nullable types and the ternary operator: why is `? 10 : null` forbidden? [duplicate]
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The compiler first tries to evaluate the right-hand expression:
GetBoolValue() ? 10 : null
The 10 is an int literal (not int?) and null is, well, null. There's no implicit conversion between those two hence the error message.
If you change the right-hand expression to ...
WaitAll vs WhenAll
What is the difference between Task.WaitAll() and Task.WhenAll() from the Async CTP ?
Can you provide some sample code to illustrate the different use cases ?
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Can't connect to local MySQL server through socket '/var/mysql/mysql.sock' (38)
...ysql/mysql.sock
you can check if mysql is running with the following command:
mysqladmin -u root -p status
try changing your permission to mysql folder. If you are working locally, you can try:
sudo chmod -R 755 /var/lib/mysql/
that solved it for me
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How to document thrown exceptions in c#/.net
... ones you might encounter within your method, wrap them in your exception, and throw that.
Another place you might want to do it this way is if your method is on the face of your API. Just like a facade simplifies multiple interfaces into a single interface, your API should simplify multiple excep...
Drawing an image from a data URL to a canvas
... suggested in this space that it might not be necessary to use the onload handler when a data URI is involved. Based on experimental tests from this question, it is not safe to do so. The above sequence—create the image, set the onload to use the new image, and then set the src—is necessary for ...