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Defining a variable with or without export
...temporary variables etc.
It's important to note that exporting a variable doesn't make it available to parent processes. That is, specifying and exporting a variable in a spawned process doesn't make it available in the process that launched it.
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String isNullOrEmpty in Java? [duplicate]
This surely has been 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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SVN: Is there a way to mark a file as “do not commit”?
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Subversion does not have a built-in "do not commit" / "ignore on commit" feature, as of February 2016 / version 1.9. This answer is a non-ideal command-line workaround
As the OP states, TortoiseSVN has a built in changelist, "ignore-on...
How to Flatten a Multidimensional Array?
... [x] => X
[y] => Y
[p] => P
[q] => Q
)
But it does not work when the outer array has non numeric keys. In that case, you will have to call array_values first.
$c = ["a" => ["x" => "X", "y" => "Y"], "b" => ["p" => "P", "q" => "Q"]];
print_r(array_merge(...
How to “hibernate” a process in Linux by storing its memory to disk and restoring it later?
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I used to maintain CryoPID, which is a program that does exactly what you are talking about. It writes the contents of a program's address space, VDSO, file descriptor references and states to a file that can later be reconstructed. CryoPID started when there were no usable ho...
C fopen vs open
...at may turn out to be a lot faster than what you're doing with open.
fopen does line ending translation if the file is not opened in binary mode, which can be very helpful if your program is ever ported to a non-Unix environment (though the world appears to be converging on LF-only (except IETF text...
ORA-30926: unable to get a stable set of rows in the source tables
...very same problem in a merge statement I developed. Make sure your update does not touch the same record more than once in the execution of the merge.
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HTML5 LocalStorage: Checking if a key exists [duplicate]
Why this does not work ?
4 Answers
4
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How can I reconcile detached HEAD with master/origin?
...tive rebase operation). Usually you would use git rebase --abort, but that does some extra resetting that you probably want to avoid (it moves HEAD back to the original branch and resets it back to the original commit, which will undo some of the work we did above).
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Are Java static calls more or less expensive than non-static calls?
...ery old JVMs (which did not do anywhere near the optimization that Hotspot does), or some remembered trivia about C++ (in which a dynamic call uses one more memory access than a static call).
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