大约有 45,055 项符合查询结果（耗时：0.0414秒） [XML]
List or IList [closed]
...class through a library that others will use, you generally want to expose it via interfaces rather than concrete implementations. This will help if you decide to change the implementation of your class later to use a different concrete class. In that case the users of your library won't need to u...
What are the differences in die() and exit() in PHP?
What are the differences between die() and exit() functions in PHP?
16 Answers
16
...
How to convert a PNG image to a SVG? [closed]
...
There is a website where you can upload your image, and see the result.
http://vectormagic.com/home
But if you want to download your svg-image, you need to register.
(If you register, you get 2 images for free)
...
How to convert from System.Enum to base integer?
... to create a generic method for converting any System.Enum derived type to its corresponding integer value, without casting and preferably without parsing a string.
...
Getting the caller function name inside another function in Python? [duplicate]
...
You can use the inspect module to get the info you want. Its stack method returns a list of frame records.
For Python 2 each frame record is a list. The third element in each record is the caller name. What you want is this:
>>> import inspect
>>> def f():
... ...
Is using a lot of static methods a bad thing?
..."safe" static method will always give the same output for the same inputs. It modifies no globals and doesn't call any "unsafe" static methods of any class. Essentially, you are using a limited sort of functional programming -- don't be afraid of these, they're fine.
An "unsafe" static method mutate...
Get records with max value for each group of grouped SQL results
...also the problems of returning multiple rows when there are more than one with the same maximum value (as the other answers would do)
Note: This is a mysql-only solution. All other databases I know will throw an SQL syntax error with the message "non aggregated columns are not listed in the group by...
How to get the first element of an array?
...
@Andy There were no assumptions, as OP's question was quite clear and specific.
– John Hartsock
Aug 11 '15 at 0:36
5
...
How to cast Object to its actual type?
...
I don't think you can (not without reflection), you should provide a type to your function as well:
void MyMethod(Object obj, Type t)
{
var convertedObject = Convert.ChangeType(obj, t);
...
}
UPD:
This may work for you:
void MyMethod(Object...
Should private helper methods be static if they can be static
...
I prefer such helper methods to be private static; which will make it clear to the reader that they will not modify the state of the object. My IDE will also show calls to static methods in italics, so I will know the method is static without looking the signature.
...