大约有 15,000 项符合查询结果（耗时：0.0377秒） [XML]
Extract a regular expression match
I'm trying to extract a number from a string.
12 Answers
12
...
How to wrap text in LaTeX tables?
I am creating a report in LaTeX which involves a few tables. I'm stuck on that as my cell data in the table is exceeding the width of the page. Can I somehow wrap the text so that it falls into the next line in the same cell of the table?
...
Is there a function in python to split a word into a list? [duplicate]
...issen: I get "ValueError: empty separator" when trying that. The empty regex is not terribly well defined.
– Greg Hewgill
Aug 17 '10 at 5:23
...
Size of Matrix OpenCV
...m new to OpenCV. Could you please tell me how to obtain the size of a matrix in OpenCV?. I googled and I am still searching, but if any of you know the answer, please help me.
...
How does zip(*[iter(s)]*n) work in Python?
...
iter() is an iterator over a sequence. [x] * n produces a list containing n quantity of x, i.e. a list of length n, where each element is x. *arg unpacks a sequence into arguments for a function call. Therefore you're passing the same iterator 3 times to zip(), and...
Checking if sys.argv[x] is defined
...
In the end, the difference between try, except and testing len(sys.argv) isn't all that significant. They're both a bit hackish compared to argparse.
This occurs to me, though -- as a sort of low-budget argparse:
arg_names = ['command', 'x', 'y', 'operation', 'opt...
Which version of the git file will be finally used: LOCAL, BASE or REMOTE?
....
You can also get rid of meld and just edit the file with your favorite text editor.
The code between <<<< HEAD and ===== markers is the one of your local file before the merge.
The code between ==== and >>>> <branch name> is the one of the remote file.
...
How do you use “
... function works. The other level (the child) does the work. The following example shows how can use this idea to generate a family of power functions. The parent function (power) creates child functions (square and cube) that actually do the hard work.
power <- function(exponent) {
function(x)...
Unicode equivalents for \w and \b in Java regular expressions?
Many modern regex implementations interpret the \w character class shorthand as "any letter, digit, or connecting punctuation" (usually: underscore). That way, a regex like \w+ matches words like hello , élève , GOÄ_432 or gefräßig .
...