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How do I concatenate two lists in Python?
...ed to previous versions in the 3.x family. In unsupported versions a SyntaxError is going to be raised.
As with the other approaches, this too creates as shallow copy of the elements in the corresponding lists.
The upside to this approach is that you really don't need lists in order to perform i...
How can I format my grep output to show line numbers at the end of the line, and also the hit count?
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your solution seems fine but get an error awk95: syntax error at source line context is >>> ' <<< missing } awk95: bailing out at source line 1
– London
Oct 19 '10 at 12:27
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How to wait for a number of threads to complete?
...o capture any exceptions that occurred and store them locally (or store an error message/condition). In the example, f.get() returns your object that you submitted to the ExecutorService. Your object could have a method for retrieving any exceptions/error conditions. Depending on how you modify the ...
I want to delete all bin and obj folders to force all projects to rebuild everything
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thx for your answer. I get an error: %%G was unexpected at this time.
– MichaelD
Apr 16 '09 at 12:32
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Type hinting a collection of a specified type
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edited Apr 8 at 2:05
answered Apr 8 '18 at 10:28
Co...
Fast way of counting non-zero bits in positive integer
...nt() took about 1/20th of the time of bin(n).count("1"). So if you can install gmpy, use that.
To answer a question in the comments, for bytes I'd use a lookup table. You can generate it at runtime:
counts = bytes(bin(x).count("1") for x in range(256)) # py2: use bytearray
Or just define it lit...
How can I remove an element from a list?
...it documentation for R on how to remove elements from lists, but trial and error tells me
myList[[5]] <- NULL
will remove the 5th element and then "close up" the hole caused by deletion of that element. That suffles the index values, So I have to be careful in dropping elements. I must ...
What is “rvalue reference for *this”?
...-value. So if this is in the type Object:
Object foo;
foo.RValueFunc(); //error: no `RValueFunc` version exists that takes `this` as l-value.
Object().RValueFunc(); //calls the non-const, && version.
This way, you can specialize behavior based on whether the object is being accessed via a...
How to step through Python code to help debug issues?
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Yes! There's a Python debugger called pdb just for doing that!
You can launch a Python program through pdb by using pdb myscript.py or python -m pdb myscript.py.
There are a few commands you can then issue, which are documented on the pdb page.
Some usef...
Check play state of AVPlayer
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Also need notification of error? AVPlayerItemFailedToPlayToEndTimeNotification
– ToolmakerSteve
Feb 5 '16 at 17:32
add a comm...