大约有 15,000 项符合查询结果（耗时：0.0258秒） [XML]
Why does Python print unicode characters when the default encoding is ASCII?
...anks to bits and pieces from various replies, I think we can stitch up an explanation.
By trying to print an unicode string, u'\xe9', Python implicitly try to encode that string using the encoding scheme currently stored in sys.stdout.encoding. Python actually picks up this setting from the enviro...
List changes unexpectedly after assignment. How do I clone or copy it to prevent this?
...ew_list = old_list.copy()
You can slice it:
new_list = old_list[:]
Alex Martelli's opinion (at least back in 2007) about this is, that it is a weird syntax and it does not make sense to use it ever. ;) (In his opinion, the next one is more readable).
You can use the built in list() function:
n...
C++ Dynamic Shared Library on Linux
...to perform static linkage */
virtual void DoSomething();
private:
int x;
};
#endif
myclass.cc
#include "myclass.h"
#include <iostream>
using namespace std;
extern "C" MyClass* create_object()
{
return new MyClass;
}
extern "C" void destroy_object( MyClass* object )
{
delete obj...
Using the scrollwheel in GNU screen
...elieve you can just add a line like this to your ~/.screenrc:
termcapinfo xterm* ti@:te@
Where "xterm*" is a glob match of your current TERM. To confirm it works, ^A^D to detach from your screen, then screen -d -r to reattach, then ls a few times, and try to scroll back. It works for me.
What...
How do I check if a given string is a legal/valid file name under Windows?
...t's going to be a legal filename under Windows. I've tried to use regular expression like [a-zA-Z0-9_]+ but it doesn't include many national-specific characters from various languages (e.g. umlauts and so on). What is the best way to do such a check?
...
How to handle Objective-C protocols that contain properties?
...
Here's an example of mine that works perfectly, the protocol definition first of all:
@class ExampleClass;
@protocol ExampleProtocol
@required
// Properties
@property (nonatomic, retain) ExampleClass *item;
@end
Below is a workin...
What is code coverage and how do YOU measure it?
... coverage is a measurement of how many lines/blocks/arcs of your code are executed while the automated tests are running.
Code coverage is collected by using a specialized tool to instrument the binaries to add tracing calls and run a full set of automated tests against the instrumented product. A ...
JavaScript variables declare outside or inside loop?
...pt or ActionScript.
var is a directive for the parser, and not a command executed at run-time. If a particular identifier has been declared var once or more anywhere in a function body(*), then all use of that identifier in the block will be referring to the local variable. It makes no difference w...
Replace one character with another in Bash
...
Use inline shell string replacement. Example:
foo=" "
# replace first blank only
bar=${foo/ /.}
# replace all blanks
bar=${foo// /.}
See http://tldp.org/LDP/abs/html/string-manipulation.html for more details.
...
How do I make an asynchronous GET request in PHP?
...t_contents will do what you want
$output = file_get_contents('http://www.example.com/');
echo $output;
Edit: One way to fire off a GET request and return immediately.
Quoted from http://petewarden.typepad.com/searchbrowser/2008/06/how-to-post-an.html
function curl_post_async($url, $params)
{
...