大约有 47,000 项符合查询结果（耗时：0.0517秒） [XML]
in_array multiple values
...
answered Sep 24 '11 at 23:51
Mark ElliotMark Elliot
65.9k1818 gold badges132132 silver badges155155 bronze badges
...
filter items in a python dictionary where keys contain a specific string
...
183
How about a dict comprehension:
filtered_dict = {k:v for k,v in d.iteritems() if filter_string ...
Take the content of a list and append it to another list
...
379
You probably want
list2.extend(list1)
instead of
list2.append(list1)
Here's the differen...
Pandas get topmost n records within each group
...
3 Answers
3
Active
...
How to remove last n characters from every element in the R vector
...rame("data"=char_array,"data2"=1:4)
a$data = substr(a$data,1,nchar(a$data)-3)
a should now contain:
data data2
1 foo_ 1
2 bar_ 2
3 ap 3
4 b 4
share
|
improve this answer
|
...
Summarizing multiple columns with dplyr? [duplicate]
...df %>% group_by(grp) %>% summarise_all(list(mean))
#> # A tibble: 3 x 5
#> grp a b c d
#> <int> <dbl> <dbl> <dbl> <dbl>
#> 1 1 3.08 2.98 2.98 2.91
#> 2 2 3.03 3.04 2.97 2.87
#> 3 3 2.85 2.95 2.95 3.06...
Implementing slicing in __getitem__
...m__(self, val):
... print val
...
>>> c = C()
>>> c[3]
3
>>> c[3:4]
slice(3, 4, None)
>>> c[3:4:-2]
slice(3, 4, -2)
>>> c[():1j:'a']
slice((), 1j, 'a')
share
|
...
Read user input inside a loop
...
answered Jul 30 '11 at 13:42
dankdank
1,13411 gold badge77 silver badges22 bronze badges
...
Python using enumerate inside list comprehension
...t that gets returned is as expected:
> [(0, 'a'), (1, 'b'), (2, 'c'), (3, 'd')]
share
|
improve this answer
|
follow
|
...
what is the function of webpages:Enabled in MVC 3 web.config
I just started a new MVC 3 project. Can anyone tell me what
3 Answers
3
...