大约有 30,000 项符合查询结果（耗时：0.0483秒） [XML]
How to use the pass statement?
...ompileError(Exception):
pass
Similarly, classes intended as abstract base class often have an explicit empty __init__ or other methods that subclasses are supposed to derive. (e.g. pebl)
class _BaseSubmittingController(_BaseController):
def submit(self, tasks): pass
def retrieve(self,...
Scaling Node.js
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
Draft saved
Draft discarded
...
What is your preferred style for naming variables in R? [closed]
...
I could just be misremembering based on my own bias towards mixed case but I believe that's what RG always used when I was working for him. I figure what's good for RG is good for me!
– geoffjentry
Dec 23 '09 at 0:32...
ggplot2 keep unused levels barplot
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
Draft saved
Draft discarded
...
Using usort in php with a class private function
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
Draft saved
Draft discarded
...
Are static class variables possible in Python?
...an coexist (unlike with __slots__).
Example usage:
class MyBaseClass(metaclass = StaticVarsMeta):
__statics__ = {'a','b','c'}
i = 0 # regular attribute
a = 1 # static var defined (optional)
class MyParentClass(MyBaseClass):
_...
Which method performs better: .Any() vs .Count() > 0?
...ve used LINQ to filter it etc (Where etc), you will have an iterator-block based sequence, and so this ICollection<T> optimisation is useless.
In general with IEnumerable<T> : stick with Any() ;-p
share
...
Best practices for overriding isEqual: and hash
...me -hash value for every instance. Otherwise, yes, you must implement hash based only on objects which affect equality. This is tricky if you use lax comparisons in -isEqual: (e.g. case-insensitive string comparisons). For ints, you can generally use the int itself, unless you’ll be comparing with...
How to avoid “too many parameters” problem in API design?
...Classes are grouped logically and that kind of contextualization cannot be based on quantities. However C#'s immutability support starts creating problems at a certain number of properties before we start violating good OO design principles.
– Sedat Kapanoglu
J...
How to sleep for five seconds in a batch file/cmd [duplicate]
...
I'm fairly certain I've used it on Server 2003 (same code base as XP), so it's a wonder it's not on XP then...
– asveikau
Nov 4 '09 at 9:56
48
...