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In MySQL, can I copy one row to insert into the same table?
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How do you test functions and closures for equality?
...ange depending on optimization. If "===" were defined on
functions, the compiler would not be allowed to merge identical method
bodies, share thunks, and perform certain capture optimizations in
closures. Further, equality of this sort would be extremely
surprising in some generics context...
How to get device make and model on iOS?
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EITHER try this library: http://github.com/erica/uidevice-extension/ (by Erica Sadun). (The library is 7-8 years old, and hence is obsolete)
(Sample Code):
[[UIDevice currentDevice] platformType] // ex: UIDevice4GiPhone
[[UIDevice current...
How to handle button clicks using the XML onClick within Fragments
...I'm not sure if it is a "valid" solution neither, but it works.
Based on: https://developer.android.com/tools/data-binding/guide.html#binding_events
It can be done with data bindings: Just add your fragment instance as a variable, then you can link any method with onClick.
<layout xmlns:androi...
How to handle anchor hash linking in AngularJS
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Problem can come when you add routing: if add ngView each change of url's hash would trigger route reload... In your example there is no routing and url does not reflect current item... But thanks for pointing to $anchorScroll
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Environment variables for java installation
...plaining the rationale behind all these environment variables.
Optional recommendations
Add an user environment variable JAVA_TOOL_OPTIONS with value -Dfile.encoding="UTF-8". This ensures that Java (and tools such as Maven) will run with a Charset.defaultCharset() of UTF-8 (instead of the default...
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.
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What's the state of the art in email validation for Rails?
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/\A[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]+\z/
That was adapted from http://www.regular-expressions.info/email.html -- which you should read if you really want to know all the tradeoffs. If you want a more correct and much more complicated fully RFC822-compliant regex, that's on that page too...
In Django, how do I check if a user is in a certain group?
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Restore the state of std::cout after manipulating it
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