大约有 46,000 项符合查询结果(耗时:0.0377秒) [XML]

https://stackoverflow.com/ques... 

How to change a django QueryDict to Python Dict?

... In Django 1.8 on Python 3 all I needed was dict(queryDict). – fmalina May 15 '15 at 19:16 1 ...
https://stackoverflow.com/ques... 

Python: most idiomatic way to convert None to empty string?

... If you actually want your function to behave like the str() built-in, but return an empty string when the argument is None, do this: def xstr(s): if s is None: return '' return str(s) ...
https://stackoverflow.com/ques... 

Will the Garbage Collector call IDisposable.Dispose for me?

...lizer, and implement IDisposable, that your finalizer needs to explicitly call Dispose. This is logical, and is what I've always done in the rare situations where a finalizer is warranted. ...
https://stackoverflow.com/ques... 

How to Calculate Execution Time of a Code Snippet in C++

... You can use this function I wrote. You call GetTimeMs64(), and it returns the number of milliseconds elapsed since the unix epoch using the system clock - the just like time(NULL), except in milliseconds. It works on both windows and linux; it is thread safe. Not...
https://stackoverflow.com/ques... 

How do I analyze a program's core dump file with GDB when it has command-line parameters?

...xt_ptr = "string in text segment"; (void)argv; mmap_ptr = (char *)malloc(sizeof(data_ptr) + 1); strcpy(mmap_ptr, data_ptr); mmap_ptr[10] = 'm'; mmap_ptr[11] = 'm'; mmap_ptr[12] = 'a'; mmap_ptr[13] = 'p'; printf("text addr: %p\n", text_ptr); printf("data addr: %p\n...
https://stackoverflow.com/ques... 

Python list subtraction operation

... [1,2] you will get empty list. [1,1,2,2] - [2] gives [1,1] So it is not really list substraction, it is more like "List from List X without elements from set Y". – Alfred Zien Feb 6 '16 at 10:25 ...
https://stackoverflow.com/ques... 

'and' (boolean) vs '&' (bitwise) - Why difference in behavior with lists vs numpy arrays?

... and tests whether both expressions are logically True while & (when used with True/False values) tests if both are True. In Python, empty built-in objects are typically treated as logically False while non-empty built-ins are logically True. This facilitates the c...
https://stackoverflow.com/ques... 

Can you run GUI applications in a Docker container?

... You can simply install a vncserver along with Firefox :) I pushed an image, vnc/firefox, here: docker pull creack/firefox-vnc The image has been made with this Dockerfile: # Firefox over VNC # # VERSION 0.1 # DOCKER-VERSION ...
https://stackoverflow.com/ques... 

What is the difference between “px”, “dip”, “dp” and “sp”?

...lems with dp while everything works fine with dip – DallaRosa Jul 4 '11 at 6:07 255 One note abou...
https://stackoverflow.com/ques... 

How do you detect where two line segments intersect? [closed]

...f r × s = 0 and (q − p) × r ≠ 0, then the two lines are parallel and non-intersecting. If r × s ≠ 0 and 0 ≤ t ≤ 1 and 0 ≤ u ≤ 1, the two line segments meet at the point p + t r = q + u s. Otherwise, the two line segments are not parallel but do not intersect....