大约有 42,000 项符合查询结果（耗时：0.0419秒） [XML]
What is the difference between '/' and '//' when used for division?
...
13 Answers
13
Active
...
Regular expression for matching HH:MM time format
...
375
Your original regular expression has flaws: it wouldn't match 04:00 for example.
This may wor...
Validating IPv4 addresses with regexp
...
36 Answers
36
Active
...
Find element's index in pandas Series
...
>>> myseries[myseries == 7]
3 7
dtype: int64
>>> myseries[myseries == 7].index[0]
3
Though I admit that there should be a better way to do that, but this at least avoids iterating and looping through the object and moves it to the C level....
How to sort two lists (which reference each other) in the exact same way
...
13 Answers
13
Active
...
Extract first item of each sublist
...
Using list comprehension:
>>> lst = [['a','b','c'], [1,2,3], ['x','y','z']]
>>> lst2 = [item[0] for item in lst]
>>> lst2
['a', 1, 'x']
share
|
improve this answ...
Python dictionary: Get list of values for list of keys
...
213
A list comprehension seems to be a good way to do this:
>>> [mydict[x] for x in mykeys...
LISTAGG in Oracle to return distinct values
...
|
edited Apr 13 '19 at 23:57
Jon Heller
30.3k33 gold badges6262 silver badges110110 bronze badges
...
Difference between `set`, `setq`, and `setf` in Common Lisp?
...
173
Originally, in Lisp, there were no lexical variables -- only dynamic ones. And
there was no SETQ...
How can I split a string into segments of n characters?
...
369
var str = 'abcdefghijkl';
console.log(str.match(/.{1,3}/g));
Note: Use {1,3} inste...