大约有 13,800 项符合查询结果（耗时：0.0275秒） [XML]
Regex to Match Symbols: !$%^&*()_+|~-=`{}[]:";'?,./
...l character in character classes, so it needs to be first:
/[-!$%^&*()_+|~=`{}\[\]:";'<>?,.\/]/
You also need to escape the other regular expression metacharacters.
Edit:
The hyphen is special because it can be used to represent a range of characters. This same character class can be ...
How to print the full traceback without halting the program?
...ve already pointed out the traceback module.
Please notice that with print_exc, in some corner cases, you will not obtain what you would expect. In Python 2.x:
import traceback
try:
raise TypeError("Oups!")
except Exception, err:
try:
raise TypeError("Again !?!")
except:
...
How do you detect where two line segments intersect? [closed]
...he lines
// intersect the intersection point may be stored in the floats i_x and i_y.
char get_line_intersection(float p0_x, float p0_y, float p1_x, float p1_y,
float p2_x, float p2_y, float p3_x, float p3_y, float *i_x, float *i_y)
{
float s1_x, s1_y, s2_x, s2_y;
s1_x = p1_x - p0_x; ...
What is the difference between g++ and gcc?
...as a few extra macros.
Extra Macros when compiling *.cpp files:
#define __GXX_WEAK__ 1
#define __cplusplus 1
#define __DEPRECATED 1
#define __GNUG__ 4
#define __EXCEPTIONS 1
#define __private_extern__ extern
share
...
When to use in vs ref vs out
...f myfuncOut and myfuncRef are identical as expected.
outRefTest.myfunc:
IL_0000: nop
IL_0001: ldc.i4.0
IL_0002: starg.s 00
IL_0004: ldarg.0
IL_0005: stloc.0
IL_0006: br.s IL_0008
IL_0008: ldloc.0
IL_0009: ret
outRefTest.myfuncOut:
IL_0000: ...
How to use Boost in Visual Studio 2010
...boost (1.47.0 as of writing) into a directory of your choice (e.g. C:\boost_1_47_0).
Create a new empty project in Visual Studio.
Open the Property Manager and expand one of the configuration for the platform of your choice.
Select & right click Microsoft.Cpp.<Platform>.user, and select Pr...
TypeScript typed array usage
...
You have an error in your syntax here:
this._possessions = new Thing[100]();
This doesn't create an "array of things". To create an array of things, you can simply use the array literal expression:
this._possessions = [];
Of the array constructor if you want to se...
What is the use of join() in Python threading?
... @Aviator45003: Yes, by using the timeout argument like: demon_thread.join(0.0), join() is by default blocking without regard to the daemonized attribute. But joining a demonized thread opens most likely a whole can of trouble! I'm now considering to remove the join() call in my little ...
What's the canonical way to check for type in Python?
...
str.__subclasses__() only returns the direct subclasses of str, and does not do the same thing as issubclass() or isinstance(). (To do that, you would have to recursively call .__subclasses__().
– Thomas Wou...
Regular Expression for alphanumeric and underscores
...that contains only those characters (or an empty string), try
"^[a-zA-Z0-9_]*$"
This works for .NET regular expressions, and probably a lot of other languages as well.
Breaking it down:
^ : start of string
[ : beginning of character group
a-z : any lowercase letter
A-Z : any uppercase letter
0-...