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Java synchronized method lock on object, or method?
...chronize on the whole object, so two thread accessing a different variable from this same object would block each other anyway.
If you want to synchronize only on one variable at a time, so two threads won't block each other while accessing different variables, you have synchronize on them separat...
Propagate all arguments in a bash shell script
...e script that calls another script, and I need to propagate the parameters from my current script to the script I am executing.
...
How do I rename the extension for a bunch of files?
...{file%.html}.txt" That operator prevents file names that start with a '-' from being parsed by mv as arguments.
– rcreswick
Jul 9 '15 at 8:54
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No route matches “/users/sign_out” devise rails 3
... I did the test and it works for me. Don't forget that things change from one version to another (be it in Rails or Devise). Besides, logging out is state-changing behaviour which should not be done using GET methods (in my humble opinion).
– Jessie Dedecker
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How can I convert a Unix timestamp to DateTime and vice versa?
... For the .NET Framework 4.6 and above there is now static DateTimeOffset.FromUnixMilliseconds and DateTimeOffset.ToUnixMilliseconds.
– rookie1024
May 18 '16 at 2:49
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How to launch Safari and open URL from iOS app
On the settings page, I want to include three links to
15 Answers
15
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How can I use a Python script in the command line without cd-ing to its directory? Is it the PYTHONP
...in either source or
compiled form). Extension modules cannot be imported from zipfiles.
The default search path is installation dependent, but generally
begins with prefix/lib/pythonversion (see PYTHONHOME above). It is
always appended to PYTHONPATH.
An additional directory will be i...
Sorting 1 million 8-decimal-digit numbers with 1 MB of RAM
... Once VALUE reaches zero you should have transmitted all integers in order from largest to smallest to the destination, and have only used about 47 bits of RAM for the two persistent variables (and whatever small amount you need for the temporary values).
I know this is horrible, and I know there c...
Handling specific errors in JavaScript (think exceptions)
...
To create custom exceptions, you can inherit from the Error object:
function SpecificError () {
}
SpecificError.prototype = new Error();
// ...
try {
throw new SpecificError;
} catch (e) {
if (e instanceof SpecificError) {
// specific error
} else {
thr...
Asterisk in function call
...as saying itertools.chain([ 1, 2 ], [ 3, 4 ])
This is obviously different from passing in just uniqueCrossTabs. In your case, you have a list of lists that you wish to flatten; what itertools.chain() does is return an iterator over the concatenation of all the positional arguments you pass to it, w...