大约有 40,000 项符合查询结果（耗时：0.0532秒） [XML]
How to use the pass statement?
...the syntactical requirement that code blocks (after if, except, def, class etc.) cannot be empty. Empty code blocks are however useful in a variety of different contexts, such as in examples below, which are the most frequent use cases I have seen.
Therefore, if nothing is supposed to happen in a c...
What is the purpose of class methods?
...vel function that operates on MyClass (factory, dependency injection stub, etc), make it a classmethod. Then it'll be available to subclasses.
share
|
improve this answer
|
f...
PHP function overloading
...creates
The idea is you have different type of arguments, arrays, objects etc, then you detect what you were passed and go from there
function($arg1, $lastname) {
if(is_array($arg1)){
$lastname = $arg1['lastname'];
$firstname = $arg1['firstname'];
} else {
$firstnam...
How to identify platform/compiler from preprocessor macros?
... __APPLE__ is set for both OS X and iOS. You can #include <TargetConditionals.h> inside #ifdef __APPLE__, which then gives you a TARGET_OS_IPHONE #define.
– Ted Mielczarek
Aug 18 '11 at 11:51
...
How to make an immutable object in Python?
...])
It does not solve the problem that attributes can be accessed via [0] etc., but at least it's considerably shorter and provides the additional advantage of being compatible with pickle and copy.
namedtuple creates a type similar to what I described in this answer, i.e. derived from tuple and u...
How to check a string for specific characters?
...ould work:
('1' in var) and ('2' in var) and ('3' in var) ...
'1', '2', etc. should be replaced with the characters you are looking for.
See this page in the Python 2.7 documentation for some information on strings, including about using the in operator for substring tests.
Update: This does th...
What does extern inline do?
...ing FILE and LINE as parameters. This can result in better debugger/editor/etc behaviour when the function body is non-trivial.
– Steve Jessop
Oct 20 '08 at 22:01
...
Set select option 'selected', by value
...es and belongs to the top. Its the proper way, no fiddling with prop, attr etc. and progagates all events properly.
– Polygnome
Mar 10 '17 at 12:49
1
...
How can I maximize a split window?
...
@guru: C-w, ^, :buf OtherFile.txt, :sbuf Otherfile.txt etc. (see help for wincmd, switchbuf for details). The funy thing is that my (IMHO) correct answer hadn't been given yet...
– sehe
Oct 20 '11 at 12:32
...
How to reverse a string in Go?
... you cannot use len() in Go to find out the length of a string/Array/Slice etc... Here's why? - len() in Go means the size of the input in bytes. It does not correspond to its length. - Not all utf8's runes are of the same size. It can be either 1, 2, 4, or 8. - You should use unicode/ut...