大约有 40,000 项符合查询结果(耗时:0.0489秒) [XML]
Xcode Project vs. Xcode Workspace - Differences
... an application or library) is built. They include build settings, such as compiler and linker flags, and they define which files (source code and resources) actually belong to a product. When you build/run, you always select one specific target.
It is likely that you have a few targets that share ...
How to see which plugins are making Vim slow?
...
|
show 17 more comments
79
...
std::vector performance regression when enabling C++11
... also pass the -flto flag to gcc 4.7.2), the results are identical:
(I am compiling your original code, with container.push_back(Item());)
$ g++ -std=c++11 -O3 -flto regr.cpp && perf stat -r 10 ./a.out
Performance counter stats for './a.out' (10 runs):
35.426793 task-clock ...
Why doesn't c++ have &&= or ||= for booleans?
...forming C++ code.
1 Admittedly this is a rather big caveat as Angew’s comment illustrates:
bool b = true;
b &= 2; // yields `false`.
The reason is that b & 2 performs integer promotion such that the expression is then equivalent to static_cast<int>(b) & 2, which results in ...
Multiple select statements in Single query
...
add a comment
|
25
...
What does the M stand for in C# Decimal literal notation?
...were unambiguous (and it may well be, although "1e" ends up with a curious compiler error message suggesting it's out of the range of viable doubles, not that it's syntactically invalid; I suspect that's a bug) it would still be confusing. "c" would possibly make sense without causing any confusion,...
Enable Vim Syntax Highlighting By Default
... options:
Create an empty vimrc.
Copy vimrc_example.vim as your vimrc (recommended, thanks @oyenamit). You can find vimrc_example.vim in the runtime directory.
The location of the runtime directory varies between operating systems:
On my system (Arch Linux, and Mac, thanks @totophe), it's in /...
What's the idiomatic syntax for prepending to a short python list?
...
The s.insert(0, x) form is the most common.
Whenever you see it though, it may be time to consider using a collections.deque instead of a list.
share
|
improv...
How do browsers pause/change Javascript when tab or window is not active?
...
|
show 1 more comment
11
...
What is the smallest possible valid PDF?
...rtxref
149
%EOF
which is 291 bytes of PDF joy. Acrobat opens it, but it complains somewhat. There is one page in it and it is 3/72" square, the minimum allowed by the spec.
However, Acrobat X doesn't even bother with the cross reference table anymore, so we can take that out:
%PDF-1.0
1 0 obj...
