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Is errno thread-safe?
...l
errno is defined by including the
header , as specified by the
C Standard ... For each thread of a
process, the value of errno shall not
be affected by function calls or
assignments to errno by other threads.
Also see http://linux.die.net/man/3/errno
errno is thread-local; settin...
Remove all occurrences of a value from a list?
... I wouldn't call this solution the best. List comprehensions are faster and easier to understand while skimming through code. This would rather be more of a Perl way than Python.
– Peter Nimroot
Aug 13 '16 at 15:25
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To underscore or to not to underscore, that is the question
...nguages? For example since C# is case-sensitive you can call a field "foo" and the public property "Foo" and it works fine.
...
Why does Math.Round(2.5) return 2 instead of 3?
...ug. C# is the language - it doesn't decide how Math.Round is implemented.
And secondly, no - if you read the docs, you'll see that the default rounding is "round to even" (banker's rounding):
Return ValueType: System.DoubleThe integer nearest a. If the
fractional component of a is halfway
b...
Span inside anchor or anchor inside span or doesn't matter?
I want to nest span and a tags. Should I
10 Answers
10
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How to make a valid Windows filename from an arbitrary string?
...gBuilder instead of a simple string; the original version will take longer and consume more memory.
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Proper way to use **kwargs in Python
... I like to use positional arguments only for required arguments, and kwargs for arguments that may or may not be specified, but it is helpful to have a default value. kwargs is nice because you can submit your args in any order you choose. Positional arguments don't give you that freedom...
Use '=' or LIKE to compare strings in SQL?
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LIKE and the equality operator have different purposes, they don't do the same thing:
= is much faster, whereas LIKE can interpret wildcards. Use = wherever you can and LIKE wherever you must.
SELECT * FROM user WHERE login LIKE ...
Java JTable setting Column Width
...n is null. This means that resizing has taken place "outside" the JTable
and the change - or "delta" - should be distributed to all of the columns regardless of
this JTable's automatic resize mode.
This might be why AUTO_RESIZE_LAST_COLUMN didn't help you.
Note: When a JTable makes adjust...
Python: List vs Dict for look up table
...f you don't need to associate values, use sets.
Memory
Both dictionaries and sets use hashing and they use much more memory than only for object storage. According to A.M. Kuchling in Beautiful Code, the implementation tries to keep the hash 2/3 full, so you might waste quite some memory.
If you...