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What are the “standard unambiguous date” formats for string-to-date conversion in R?
... the column were successfully converted to <date>. Unfortunately, it set the year to '1400' instead of '2020'. ¯_(ツ)_/¯
– owlstone
May 23 at 18:38
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Run certain code every n seconds [duplicate]
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OK, fixed, note that you may also want to set the thread made by Timer as a daemon in case you want to interrupt the program cleanly by just finishing the main thread -- in that case you'd better set t = threading.Timer &c, then t.daemon = True, and only then t.s...
How to search for a string in text files?
I want to check if a string is in a text file. If it is, do X. If it's not, do Y. However, this code always returns True for some reason. Can anyone see what is wrong?
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Retrieve only static fields declared in Java class
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What does the question mark operator mean in Ruby?
What is the purpose of the question mark operator in Ruby?
9 Answers
9
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Heap vs Binary Search Tree (BST)
...dard library insert benchmark on real hardware
I benchmarked the C++ std::set (Red-black tree BST) and std::priority_queue (dynamic array heap) insert to see if I was right about the insert times, and this is what I got:
benchmark code
plot script
plot data
tested on Ubuntu 19.04, GCC 8.3.0 in ...
What is the python “with” statement designed for?
...:
old_streams[sname] = getattr(sys, sname)
setattr(sys, sname, stream)
yield
finally:
for sname, stream in old_streams.iteritems():
setattr(sys, sname, stream)
with redirected(stdout=open("/tmp/log.txt", "w")):
# these print state...
Why JSF calls getters multiple times
Let's say I specify an outputText component like this:
9 Answers
9
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How to remove all callbacks from a Handler?
...receiving Callbacks, I'd call handler.removeCallbacksAndMessages(null) and set my handler to null, but since I would still get the callback, I'd encounter a NPE when I'd want to loop with handler.postDelayed().
– Snaker
May 23 '16 at 18:19
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How to implement the factory method pattern in C++ correctly
There's this one thing in C++ which has been making me feel uncomfortable for quite a long time, because I honestly don't know how to do it, even though it sounds simple:
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