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How to clone ArrayList and also clone its contents?
How can I clone an ArrayList and also clone its items in Java?
21 Answers
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Searching for UUIDs in text with regex
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@cyber-monk: [0-9a-f] is identical to [a-f0-9] and [0123456789abcdef] in meaning and in speed, since the regex is turned into a state machine anyway, with each hex digit turned into an entry in a state-table. For an entry point into how this works, see en.wikipedia.org/wi...
window.onload vs
What exactly is the difference between the window.onload event and the onload event of the body tag? when do I use which and how should it be done correctly?
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In git, what is the difference between merge --squash and rebase?
I'm new to git and I'm trying to understand the difference between a squash and a rebase. As I understand it you perform a squash when doing a rebase.
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How can I reference a commit in an issue comment on GitHub?
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To reference a commit, simply write its SHA-hash, and it'll automatically get turned into a link.
See also:
The Autolinked references and URLs / Commit SHAs section of
Writing on GitHub.
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Volatile vs. Interlocked vs. lock
...he point of volatile is that multiple threads running on multiple CPUs can and will cache data and re-order instructions.
If it is not volatile, and CPU A increments a value, then CPU B may not actually see that incremented value until some time later, which may cause problems.
If it is volatile, th...
What is a “Stub”?
... my own words: mock objects "expect" certain methods to be called on them, and typically cause a unit test to fail if their expectations aren't met. Stub objects provide canned responses (and can be autogenerated by helper libraries), but typically do not directly cause the unit test to fail. They a...
Performance optimization strategies of last resort [closed]
...ite already, but it occurs to me that almost all are very problem-specific and fairly narrow. And almost all repeat the advice to avoid premature optimization.
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Multiple cases in switch statement
...ld use some if's (or a table lookup) to reduce the input to a set of enums and switch on the enum.
– Harvey
Jul 28 '13 at 20:00
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Suppress command line output
... the invocation to this:
taskkill /im "test.exe" /f >nul 2>&1
and all will be better.
That works because stdout is file descriptor 1, and stderr is file descriptor 2 by convention. (0 is stdin, incidentally.) The 2>&1 copies output file descriptor 2 from the new value of 1, whic...