大约有 6,800 项符合查询结果（耗时：0.0184秒） [XML]
Difference between timestamps with/without time zone in PostgreSQL
...nstruct is a brain teaser its own, even if you already understand the WITH vs. WITHOUT TIME ZONE types. So it's a curious choice for explaining them. (: (AT TIME ZONE converts a WITH TIME ZONE timestamp to a WITHOUT TIME ZONE timestamp, and vice versa... not exactly obvious.)
–...
How to validate an email address using a regular expression?
...
community wiki
24 revs, 19 users 17%bortzmeyer
181
...
When do we have to use copy constructors?
...+11 or newer
Declare the copy-constructor with =delete at end.
Shallow vs Deep Copy
This is the best understood case and actually the only one mentioned in the other answers. shaprtooth has covered it pretty well. I only want to add that deeply copying resources that should be exclusively owned...
Catching an exception while using a Python 'with' statement
...rint 'oops'
If you want different handling for errors from the open call vs the working code you could do:
try:
f = open('foo.txt')
except IOError:
print('error')
else:
with f:
print f.readlines()
sha...
Why should I avoid using Properties in C#?
...t go of old habits and was having trouble accepting the conventions of C# (vs. C++, for example).
What I mean by this is, his "properties considered harmful" argument essentially boils down to a single statement: Properties look like fields, but they might not act like fields. And the problem with ...
What is the meaning of “non temporal” memory accesses in x86
... Intel Streaming SIMD Extensions (Intel SSE)" chapter:
Caching of Temporal vs. Non-Temporal Data
Data referenced by a program can be temporal (data will be used again) or non-temporal (data will be referenced once and not reused in the immediate future). For example, program code is generally tempo...
What are copy elision and return value optimization?
...ould severely affect the way we implement our functions in modern C++ (RVO vs std::move). During watching some of the CppCon 2014 videos, i really got the impression that all modern compilers always do RVO. Furthermore, I've read somewhere that also without any optimizations on, the compilers apply ...
Multi-key dictionary in c#? [duplicate]
...implementation itself:
http://msdn.microsoft.com/en-us/library/dd270346(v=vs.110).aspx
The obj parameter is considered to be equal to the current instance under the following conditions:
It is a Tuple object.
Its two components are of the same types as the current instance.
Its two components...
Why do I need an IoC container as opposed to straightforward DI code? [closed]
...
community wiki
8 revs, 7 users 85%Ben Scheirman
28
...
Compile time string hashing
...
constexpr is not available in VS2013, except in November 2013 CTP blogs.msdn.com/b/vcblog/archive/2013/11/18/…
– user472308
Jul 23 '14 at 18:12
...