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Why are trailing commas allowed in a list?
I am curious why in Python a trailing comma in a list is valid syntax, and it seems that Python simply ignores it:
5 Answer...
Fast way of counting non-zero bits in positive integer
...1") is the fastest I could find in pure Python.
I tried adapting Óscar's and Adam's solutions to process the integer in 64-bit and 32-bit chunks, respectively. Both were at least ten times slower than bin(n).count("1") (the 32-bit version took about half again as much time).
On the other hand, gm...
How to avoid isset() and empty()
I have several older applications that throw a lot of "xyz is undefined" and "undefined offset" messages when running on the E_NOTICE error level, because the existence of variables is not explicitly checked using isset() and consorts.
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Possible to do a MySQL foreign key to one of two possible tables?
...table.
Polymorphic Associations are supported by frameworks such as Rails and Hibernate. But they explicitly say that you must disable SQL constraints to use this feature. Instead, the application or framework must do equivalent work to ensure that the reference is satisfied. That is, the value ...
Android Left to Right slide animation
...e launch modes are single instance.
Using onfling() , I swing them left and right.
9 Answers
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PHP filesize MB/KB conversion [duplicate]
... edited Apr 6 '17 at 15:34
Andy Mercer
5,34444 gold badges3838 silver badges7575 bronze badges
answered Mar 31 '11 at 14:28
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Can I use jQuery with Node.js?
...his returns require("...").env is not a function.
– Banderi
May 28 '17 at 2:41
4
@Banderi same wi...
How can I delete all unversioned/ignored files/folders in my working copy?
...te all unversioned or ignored files in that working copy with a single command or tool? Essentially, I'm looking for the SVN analogue to git clean .
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Is there a standardized method to swap two variables in Python?
...om left to right. Notice that while
evaluating an assignment, the right-hand side is evaluated before the
left-hand side.
http://docs.python.org/3/reference/expressions.html#evaluation-order
That means the following for the expression a,b = b,a :
the right-hand side b,a is evaluated,...
Running Python code in Vim
I am writing Python code using Vim, and every time I want to run my code, I type this inside Vim:
20 Answers
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