大约有 45,000 项符合查询结果（耗时：0.0778秒） [XML]
WPF chart controls [closed]
... WPF chart which should have a 2D graph and
should have pan and zoom facilities .
12 Answers
...
C++ preprocessor __VA_ARGS__ number of arguments
...variadic argument macros, how to find the number of arguments? I am okay with boost preprocessor, if it has the solution.
...
@class vs. #import
It is to my understanding that one should use a forward-class declaration in the event ClassA needs to include a ClassB header, and ClassB needs to include a ClassA header to avoid any circular inclusions. I also understand that an #import is a simple ifndef so that an include only happens once....
Is GridFS fast and reliable enough for production?
I develop a new website and I want to use GridFS as storage for all user uploads, because it offers a lot of advantages compared to a normal filesystem storage.
...
How many classes should I put in one file? [closed]
...
A Python file is called a "module" and it's one way to organize your software so that it makes "sense". Another is a directory, called a "package".
A module is a distinct thing that may have one or two dozen closely-related classes. The trick is that a module i...
How to get unique values in an array
...
Since I went on about it in the comments for @Rocket's answer, I may as well provide an example that uses no libraries. This requires two new prototype functions, contains and unique
Array.prototype.contains = function(v) {
for (var i = 0;...
How do you rename a MongoDB database?
... set of database files, every single namespace string would have to be rewritten. This impacts:
the .ns file
every single numbered file for the collection
the namespace for every index
internal unique names of each collection and index
contents of system.namespaces and system.indexes...
How to make a python, command-line program autocomplete arbitrary things NOT interpreter
...def completer(text, state):
options = [i for i in commands if i.startswith(text)]
if state < len(options):
return options[state]
else:
return None
readline.parse_and_bind("tab: complete")
readline.set_completer(completer)
The official module docs aren't much more de...
Variable declaration in a C# switch statement [duplicate]
Why is it that in a C# switch statement, for a variable used in multiple cases, you only declare it in the first case?
7 An...
When do I really need to use atomic instead of bool? [duplicate]
...c<bool> redundant because bool is atomic by nature? I don't think it's possible to have a partially modified bool value. When do I really need to use atomic<bool> instead of bool ?
...