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When do I need to use AtomicBoolean in Java?
...pent in
managing the synchronization
mechanism itself (waiting, notifying,
etc). Since the new API uses hardware
level constructs (atomic variables)
and wait and lock free algorithms to
implement thread-safety, a lot more
of CPU time is spent "doing stuff"
rather than in managing
synchronization.
no...
Version vs build in Xcode
...ne Simulator Version/Build numbers are the same way, as are iPhones, Macs, etc.
3.2: (7W367a)
4.0: (8A400)
4.1: (8B117)
4.2: (8C134)
4.3: (8H7)
Update: By request, here are the steps to create a script that runs each time you build your app in Xcode to read the Build number, increment it, and wr...
Numpy `logical_or` for more than two arguments
... no, as the docs explicitly say, the only parameters are x1, x2, and optionally out:
numpy.logical_or(x1, x2[, out]) = <ufunc 'logical_or'>
You can of course chain together multiple logical_or calls like this:
>>> x = np.array([True, True, False, False])
>>> y = np.a...
How to create an empty file at the command line in Windows?
...omad mentions an original one:
C:\Users\VonC\prog\tests>aaaa > empty_file
'aaaa' is not recognized as an internal or external command, operable program or batch file.
C:\Users\VonC\prog\tests>dir
Folder C:\Users\VonC\prog\tests
27/11/2013 10:40 <REP> .
27/11/2013 10...
Why should I use core.autocrlf=true in Git?
...orking on that can read it), or just like you keep branches/merges/rebases/etc along the chosen policy, they should get a clear rule: set correct crlf.
– quetzalcoatl
Oct 20 '17 at 8:07
...
How do I pull my project from github?
...lone the Repository
Open VS Code (or any IDE/CLI which has command prompt etc.). Go to the directory in which you want to clone, using cd commands, and type the below line.
git config --global github.user yourGitUserName
git config --global user.email your_email
git clone git@github.com:yourGit...
R and version control for the solo data analyst
...d on the same dataset; you are preparing a report that is updated monthly, etc)
As a soloist, I don't fork that much either. However, the time I have saved by having the option to rewind has single-handedly paid back my investment in learning a version control system many, many times. You say...
How do I make a redirect in PHP?
...FC 7231 which had replaced the old RFC 2616, where only absolute URLs were allowed.
Status Codes
PHP's "Location"-header still uses the HTTP 302-redirect code, this is a "temporary" redirect and may not be the one you should use. You should consider either 301 (permanent redirect) or 303 (other).
No...
Drop multiple tables in one shot in mysql
...e A has two children B and C. Then we can use the following syntax to drop all tables.
DROP TABLE IF EXISTS B,C,A;
This can be placed in the beginning of the script instead of individually dropping each table.
share
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slf4j: how to log formatted message, object array, exception
...exact output will depend on the underlying framework (e.g. logback, log4j, etc) as well on how the underlying framework is configured. However, if the last parameter is an exception it will be interpreted as such regardless of the underlying framework.
...