大约有 40,000 项符合查询结果(耗时:0.0580秒) [XML]
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...
After array_filter(), how can I reset the keys to go in numerical order starting at 0
...y certain transformations on it depending on the placeholder starting from 0, but unfortunately it still retains the original index. I looked for a while and couldn't see anything, perhaps I just missed the obvious, but my question is...
...
How do I horizontally center an absolute positioned element inside a 100% width div? [duplicate]
... be horizontally centered within #header . Normally, I would do a margin:0 auto for relatively positioned elements but I am stuck here. Can someone show me the way?
...
Frequency table for a single variable
...es = pandas.Series([1,2,2,3,3,3, "fred", 1.8, 1.8])
>>> my_series
0 1
1 2
2 2
3 3
4 3
5 3
6 fred
7 1.8
8 1.8
>>> counts = my_series.value_counts()
>>> counts
3 3
2 2
1.8 2
fred 1
1 1
>>> len(c...
Shell equality operators (=, ==, -eq)
... guaranteed to work.
$ a=foo
$ [ "$a" = foo ]; echo "$?" # POSIX sh
0
$ [ "$a" == foo ]; echo "$?" # bash specific
0
$ [ "$a" -eq foo ]; echo "$?" # wrong
-bash: [: foo: integer expression expected
2
(Side note: Quote those variable expansions! Do not leave out the double quotes ab...
Python: Get the first character of the first string in a list?
...
You almost had it right. The simplest way is
mylist[0][0] # get the first character from the first item in the list
but
mylist[0][:1] # get up to the first character in the first item in the list
would also work.
You want to end after the first character (character z...
Is there an easy way to check the .NET Framework version?
... to know if it's version 3.5 SP 1. Environment.Version() only returns 2.0.50727.3053 .
21 Answers
...
How to extract numbers from a string and get an array of ints?
...
answered Mar 2 '10 at 22:39
Sean OwenSean Owen
62.6k1919 gold badges130130 silver badges163163 bronze badges
...
Vagrant's port forwarding not working [closed]
...
80
I'll make this an actual answer instead of just more comments.
First thing: try curl 'http://lo...
