大约有 47,000 项符合查询结果（耗时：0.0351秒） [XML]
How do I ZIP a file in C#, using no 3rd-party APIs?
...|
edited Mar 24 '11 at 13:03
adrianbanks
74.8k1919 gold badges162162 silver badges195195 bronze badges
a...
Fast way to get image dimensions (not filesize)
...re the better. I emphasize fast because my images are quite big (up to 250 MB) and it takes soooo long to get the size with ImageMagick's identify because it obviously reads the images as a whole first.
...
How to convert a std::string to const char* or char*?
...
1091
If you just want to pass a std::string to a function that needs const char* you can use
std:...
Putting an if-elif-else statement on one line?
...st likely violate PEP-8 where it is mandated that lines should not exceed 80 characters in length.
It's also against the Zen of Python: "Readability counts". (Type import this at the Python prompt to read the whole thing).
You can use a ternary expression in Python, but only for expressions, not f...
Using numpy to build an array of all combinations of two arrays
...
10 Answers
10
Active
...
Create list of single item repeated N times
...
809
You can also write:
[e] * n
You should note that if e is for example an empty list you get a...
Performance of FOR vs FOREACH in PHP
First of all, I understand in 90% of applications the performance difference is completely irrelevant, but I just need to know which is the faster construct. That and...
...
Count occurrences of a char in plain text file
...
|
edited Oct 21 '09 at 21:45
answered Oct 21 '09 at 21:37
...
Get last n lines of a file, similar to tail
... till it's found the right number of '\n' characters.
def tail( f, lines=20 ):
total_lines_wanted = lines
BLOCK_SIZE = 1024
f.seek(0, 2)
block_end_byte = f.tell()
lines_to_go = total_lines_wanted
block_number = -1
blocks = [] # blocks of size BLOCK_SIZE, in reverse orde...