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List comprehension vs. lambda + filter
I happened to find myself having a basic filtering need: I have a list and I have to filter it by an attribute of the items.
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How do you do a limit query in JPQL or HQL?
In Hibernate 3, is there a way to do the equivalent of the following MySQL limit in HQL?
14 Answers
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Double not (!!) operator in PHP
What does the double not operator do in PHP?
6 Answers
6
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How to delete duplicate lines in a file without sorting it in Unix?
... line is found and then seen[$0] == 2, and so on.
Awk evaluates everything but 0 and "" (empty string) to true. If a duplicate line is placed in seen then !seen[$0] will evaluate to false and the line will not be written to the output.
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Split value from one field to two
I've got a table field membername which contains both the last name and the first name of users. Is it possible to split those into 2 fields memberfirst , memberlast ?
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Interface or an Abstract Class: which one to use?
...ase explain when I should use a PHP interface and when I should use an abstract class ?
11 Answers
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How do I copy an entire directory of files into an existing directory using Python?
Run the following code from a directory that contains a directory named bar (containing one or more files) and a directory named baz (also containing one or more files). Make sure there is not a directory named foo .
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How to compare two files not in repo using git
... use git to diff files where at least one of them is not in the repository by using --no-index:
git diff --no-index file1.txt file2.txt
It doesn't matter which one is tracked by git and which is not - one or both can be untracked, eg:
$ date > x
$ sleep 2
$ date > y
$ git diff --color-word...
Why do we need extern “C”{ #include } in C++?
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C and C++ are superficially similar, but each compiles into a very different set of code. When you include a header file with a C++ compiler, the compiler is expecting C++ code. If, however, it is a C header, then the compiler expects the data contained in the h...
Detect rotation of Android phone in the browser with JavaScript
...n iPhone you can detect the screen's orientation and change of orientation by listening for the onorientationchange event and querying window.orientation for the angle.
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