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JavaScript isset() equivalent
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// Simple checking if we have a declared variable
isset(some) // true
// Now trying to see if we have a top level property, still valid
isset(some.nested) // false
// But here is where things fall apart: trying to access a deep property
// of a complex object; it will throw an error
isset(some.ne...
Convert MySql DateTime stamp into JavaScript's Date format
Does anyone know how I can take a MySQL datetime data type value, such as YYYY-MM-DD HH:MM:SS and either parse it or convert it to work in JavaScript's Date() function, for example:- Date('YYYY, MM, DD, HH, MM, SS);
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How to change language settings in R
...force US-english setting regardless of the system
setting. If you don't know what Terminal is you can use this R command
instead:
system("defaults write org.R-project.R force.LANG en_US.UTF-8")
but do not forget to quit R and start R.app again afterwards. Please
note that you must alw...
the source file is different from when the module was built
... and close/exit it. You may have more than one. Can you debug your changes now?
Are you running the debug version but have only built the release version (or vice versa)?
Did the compile actually succeed? I know I've clicked through the "there were errors, do you want to continue anyway?" message ...
How can I check if a URL exists via PHP?
...for a response.
All code might (and probably will) halt untill you either know the result or the requests have timed out.
For example: the code below could take a LONG time to display the page if the urls are invalid or unreachable:
<?php
$urls = getUrls(); // some function getting say 10 or more...
What is the good python3 equivalent for auto tuple unpacking in lambda?
...s, key=lambda p: (lambda x,y: (x*x + y*y))(*p))
update Python 3.8
As of now, Python 3.8 alpha1 is available, and PEP 572- assignment expressions are implemented.
So, if one uses a trick to execute multiple expressions inside a lambda - I usually do that by creating a tuple and just returning the...
How to change the docker image installation directory?
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I comment here to let people know which version could use this, after github.com/docker/docker.github.io/pull/5978 release, It change officail website.
– zhongjiajie
Mar 27 '19 at 1:17
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Custom thread pool in Java 8 parallel stream
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I see now stackoverflow.com/a/34930831/1520422 shows nicely that it actually works as announced. Yet i still don't understand HOW it works. But i'm fine with "it works". Thanks!
– Frederic Leitenberger
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Able to push to all git remotes with the one command?
...ushall '!git remote | xargs -L1 git push --all'
Running git pushall will now push all branches to all remotes.
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Iterating through a range of dates in Python
I have the following code to do this, but how can I do it better? Right now I think it's better than nested loops, but it starts to get Perl-one-linerish when you have a generator in a list comprehension.
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