大约有 41,000 项符合查询结果（耗时：0.0499秒） [XML]
How do you match only valid roman numerals with a regular expression?
...
You can use the following regex for this:
^M{0,4}(CM|CD|D?C{0,3})(XC|XL|L?X{0,3})(IX|IV|V?I{0,3})$
Breaking it down, M{0,4} specifies the thousands section and basically restrains it to between 0 and 4000. It's a relatively simple:
0: <empty> m...
Where are the Properties.Settings.Default stored?
...
In order to work with newer versions of Windows' policy of only allowing read access by default to the Program Files folder (unless you prompt for elevation with UAC, but that's another topic...), your application will have a se...
How to add extra namespaces to Razor pages instead of @using declaration?
Is there some sort of magic I need to use to get the namespaces in the pages/namespaces element in the webconfig?
5 Answe...
How to get nice formatting in the Rails console
...
The y method is a handy way to get some pretty YAML output.
y ProductColor.all
Assuming you are in script/console
As jordanpg commented, this answer is outdated. For Rails 3.2+ you need to execute the following code before you can get the y method to work:
YAML::ENGINE.yamler = 'syck'
From ...
How do I add a linker or compile flag in a CMake file?
...m-linux-androideabi-g++ compiler. When I try to compile a simple "Hello, World!" program it compiles fine. When I test it by adding a simple exception handling in that code it works too (after adding -fexceptions .. I guess it is disabled by default).
...
Why does `True == False is False` evaluate to False? [duplicate]
I get some rather unexpected behavior on an expression that works with == but not with is :
4 Answers
...
How to document Python code with doxygen [closed]
I like doxygen to create documentation of C or PHP code. I have an upcoming Python project and I think I remember that Python doesn't have /* .. */ comments, and also has its own self-documentation facility which seems to be the pythonic way to document.
...
Don't display pushd/popd stack across several bash scripts (quiet pushd/popd)
Each time I use pushd or popd, it print the stack to standard output. How not to do so?
3 Answers
...
Is module __file__ attribute absolute or relative?
...aded, if it was loaded from a file. The __file__ attribute is not present for C modules that are statically linked into the interpreter; for extension modules loaded dynamically from a shared library, it is the pathname of the shared library file.
From the mailing list thread linked by @kindall in...
Difference between JSON.stringify and JSON.parse
...
JSON.stringify turns a JavaScript object into JSON text and stores that JSON text in a string, eg:
var my_object = { key_1: "some text", key_2: true, key_3: 5 };
var object_as_string = JSON.stringify(my_object);
// "{"key_1":"some text","key_2":true,"key_3":5}"
typeof(object_as_s...