大约有 41,000 项符合查询结果（耗时：0.0565秒） [XML]
Get the value of an instance variable given its name
...
some_object.instance_variable_get("@#{name}")
There is no need to use + or intern; Ruby will handle this just fine. However, if you find yourself reaching into another object and pulling out its ivar, there's a reasonably good chance that you have broken encapsulation.
If you explicitly want to ...
typedef struct vs struct definitions [duplicate]
...uct name space (not in the C++ sense). You can use it and define variables or function arguments of the newly defined type by defining the type of the argument as struct S:
void f( struct S argument ); // struct is required here
The second line adds a type alias S in the global name space and thu...
How do I abort the execution of a Python script? [duplicate]
...
To exit a script you can use,
import sys
sys.exit()
You can also provide an exit status value, usually an integer.
import sys
sys.exit(0)
Exits with zero, which is generally interpreted as success. Non-zero codes are usually treated as errors. The def...
What is the point of noreturn?
[dcl.attr.noreturn] provides the following example:
5 Answers
5
...
Setting Short Value Java
... writing a little code in J2ME. I have a class with a method setTableId(Short tableId) . Now when I try to write setTableId(100) it gives compile time error. How can I set the short value without declaring another short variable?
...
How do you loop in a Windows batch file?
What is the syntax for a FOR loop in a Windows batch file?
8 Answers
8
...
Can git undo a checkout of unstaged files
I accidentially discard my changes on files in my local working tree via git checkout. The files aren't staged at this time. Is it posible to "undo" this checkout?
...
Import file size limit in PHPMyAdmin
...
You probably didn't restart your server ;)
Or you modified the wrong php.ini.
Or you actually managed to do both ^^
share
|
improve this answer
|
...
How to find which rspec test is taking so long
One (or a couple) of our tests are taking forever and we'd like to optimize them.
1 Answer
...
Best practice for Python assert
...
To be able to automatically throw an error when x become less than zero throughout the function. You can use class descriptors. Here is an example:
class LessThanZeroException(Exception):
pass
class variable(object):
def __init__(self, value=0):
s...