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Graph Algorithm To Find All Connections Between Two Arbitrary Vertices
...ed clique of n + 1 nodes. Even though there's clearly just one simple path from A to B, a naïve DFS will waste O(n!) time uselessly exploring the clique. Similar examples (one solution, DFS takes exponential time) can be found among DAGs, too.
– Ilmari Karonen
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subtract two times in python
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Try this:
from datetime import datetime, date
datetime.combine(date.today(), exit) - datetime.combine(date.today(), enter)
combine builds a datetime, that can be subtracted.
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How can I push to my fork from a clone of the original repo?
...you want to tell Git that git push should push to myrepo instead of origin from now on, you should run
git push -u myrepo master
instead.
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How to remove all callbacks from a Handler?
I have a Handler from my sub-Activity that was called by the main Activity . This Handler is used by sub-classes to postDelay some Runnables, and I can't manage them. Now, in the onStop event, I need to remove them before finishing the Activity (somehow I called finish() , but it still call ...
To underscore or to not to underscore, that is the question
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I'm using underscores. It is easier to distinguish them from the arguments and local variables.
– Rinat Abdullin
Jan 16 '09 at 19:12
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The communication object, System.ServiceModel.Channels.ServiceChannel, cannot be used for communicat
...tch and handle your server-side errors - do not let .NET exceptions travel from the server to the client - always wrap those into interoperable SOAP faults. Check out the WCF IErrorHandler interface and implement it on the server side
if you're about to send a second message onto your channel from t...
Shall we always use [unowned self] inside closure in Swift
...e class owns something that owns the closure.
Specifically in the example from the video
In the example on the slide, TempNotifier owns the closure through the onChange member variable. If they did not declare self as unowned, the closure would also own self creating a strong reference cycle.
Dif...
List comprehension vs. lambda + filter
...ue in Python. Even though Guido considered removing map, filter and reduce from Python 3, there was enough of a backlash that in the end only reduce was moved from built-ins to functools.reduce.
Personally I find list comprehensions easier to read. It is more explicit what is happening from the exp...
How to fix a locale setting warning from Perl?
...dard locale ("C").
My guess is you used ssh to connect to this older host from a newer desktop machine. It's common for /etc/ssh/sshd_config to contain
AcceptEnv LANG LC_*
which allows clients to propagate the values of those environment variables into new sessions.
The warning gives you a hint...
upstream sent too big header while reading response header from upstream
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upstream sent too big header while reading response header from upstream is nginx's generic way of saying "I don't like what I'm seeing"
Your upstream server thread crashed
The upstream server sent an invalid header back
The Notice/Warnings sent back from STDERR overflowed their bu...