大约有 43,081 项符合查询结果（耗时：0.0669秒） [XML]
Pandas count(distinct) equivalent
...()
Example:
In [2]: table
Out[2]:
CLIENTCODE YEARMONTH
0 1 201301
1 1 201301
2 2 201301
3 1 201302
4 2 201302
5 2 201302
6 3 201302
In [3]: table.groupby('YEARMONTH').CLIENTCODE.nunique()
Out[3...
Explicitly select items from a list or tuple
...
154
list( myBigList[i] for i in [87, 342, 217, 998, 500] )
I compared the answers with python ...
Rotating and spacing axis labels in ggplot2
...
1159
Change the last line to
q + theme(axis.text.x = element_text(angle = 90, vjust = 0.5, hjust...
How to list the contents of a package using YUM?
...d into one example:
$ repoquery -l time
/usr/bin/time
/usr/share/doc/time-1.7
/usr/share/doc/time-1.7/COPYING
/usr/share/doc/time-1.7/NEWS
/usr/share/doc/time-1.7/README
/usr/share/info/time.info.gz
On at least one RH system, with rpm v4.8.0, yum v3.2.29, and repoquery v0.0.11, repoquery -l rpm p...
The static keyword and its various uses in C++
...
150
Variables:
static variables exist for the "lifetime" of the translation unit that it's defined...
Bootstrap carousel multiple frames at once
...
14 Answers
14
Active
...
Cost of len() function
...
It's O(1) (constant time, not depending of actual length of the element - very fast) on every type you've mentioned, plus set and others such as array.array.
...
Insert spaces between words on a camel-cased token [duplicate]
...
178
See: .NET - How can you split a "caps" delimited string into an array?
Especially:
Regex.Rep...
How to append contents of multiple files into one file
...
10 Answers
10
Active
...