大约有 6,800 项符合查询结果（耗时：0.0193秒） [XML]
When to use symbols instead of strings in Ruby?
...
Here is a nice strings vs symbols benchmark I found at codecademy:
require 'benchmark'
string_AZ = Hash[("a".."z").to_a.zip((1..26).to_a)]
symbol_AZ = Hash[(:a..:z).to_a.zip((1..26).to_a)]
string_time = Benchmark.realtime do
1000_000.times { s...
JSON and XML comparison [closed]
...
community wiki
7 revs, 4 users 93%jelford
...
Expand Python Search Path to Other Source
.../lib/python3.*
do
[ -d ${d}/fail2ban ] || \
ln -vs /usr/lib/python3/dist-packages/fail2ban ${d}/
done
fi
share
|
improve this answer
|
fo...
Assigning code to a variable
...commands from controls:
http://msdn.microsoft.com/en-us/library/ms752308(v=vs.110).aspx
...but that can be a pain and overkill. For a simpler general case, you might be looking for an event handler, like:
myButton.Click += (o, e) => MessageBox.Show("Hello, World!");
That event handler can be ...
How line ending conversions work with git core.autocrlf between different operating systems
...nd messed up my files really badly, since some editors and compilers (e.g. VS2010) don't like Mac EOLs.
I guess the only way to really handle these problems is to occasionally normalize the whole repo by checking out all the files in input or false mode, running a proper normalization and re-commit...
What is the difference between customErrors and httpErrors?
...kwards compatable) element, used by Visual Studio Development Server (aka. VSDS or Cassini).
httpErrors are the new element which is only used by IIS7.
This highlights the possible problem when developing ASP.NET websites while using VSDS instead of the local IIS.
Also, refer to this post by myself ...
Checking in of “commented out” code [closed]
...mment (a few lines tops) that mentions the reasons for taking one approach vs another. In that case I wouldn't consider that to be "commented out" but documented.
– John
Apr 17 '09 at 1:09
...
What are the differences between a pointer variable and a reference variable in C++?
...ince the address is the same as the variable it references. More on stack vs heap. This implies that there is a real address of a reference that the compiler will not tell you.
int x = 0;
int &r = x;
int *p = &x;
int *p2 = &r;
assert(p == p2);
You can have pointers to pointers to po...
Bash tool to get nth line from a file
...al 0m0.198s
user 0m0.178s
sys 0m0.013s
So the difference is 0.198s vs 1.303s, around 6x times faster.
share
|
improve this answer
|
follow
|
...
When should I use C++14 automatic return type deduction?
...maintenance (I can look at a function's signature and know what it returns vs actually having to read the code), and it removes the possibility that you think it should return one type and the compiler thinks another causing problems (as has happened with every scripting language I've ever used). I...