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dplyr summarise: Equivalent of “.drop=FALSE” to keep groups with zero length in output
...
26
Since dplyr 0.8 group_by gained the .drop argument that does just what you asked for:
df = dat...
how do I work around log4net keeping changing publickeytoken
... which uses a couple of frameworks which is dependent on log4net version 1.2.10.0. Today I tried to include a new framework which is dependent on log4net version 1.2.11.0, I've been stuck ever since:
...
How to update SQLAlchemy row entry?
...
answered Mar 12 '12 at 12:49
DenisDenis
5,62966 gold badges3535 silver badges5454 bronze badges
...
How to find list intersection?
...y about duplicates then you can use set intersection:
>>> a = [1,2,3,4,5]
>>> b = [1,3,5,6]
>>> list(set(a) & set(b))
[1, 3, 5]
share
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improve this answer
...
How to get the first column of a pandas DataFrame as a Series?
...>>> import pandas as pd
>>> df = pd.DataFrame({'x' : [1, 2, 3, 4], 'y' : [4, 5, 6, 7]})
>>> df
x y
0 1 4
1 2 5
2 3 6
3 4 7
>>> s = df.ix[:,0]
>>> type(s)
<class 'pandas.core.series.Series'>
>>>
================================...
How to write multiple line string using Bash with variables?
...the command used (echo) is wrong.
Correct would be:
#!/bin/bash
kernel="2.6.39"
distro="xyz"
cat >/etc/myconfig.conf <<EOL
line 1, ${kernel}
line 2,
line 3, ${distro}
line 4 line
...
EOL
cat /etc/myconfig.conf
This construction is referred to as a Here Document and can be found in t...
Clojure: cons (seq) vs. conj (list)
...guments to insert into a collection, while cons takes just one:
(conj '(1 2 3) 4 5 6)
; => (6 5 4 1 2 3)
(cons 4 5 6 '(1 2 3))
; => IllegalArgumentException due to wrong arity
Another difference is in the class of the return value:
(class (conj '(1 2 3) 4))
; => clojure.lang.Persistent...
深入解析ATL - 文档下载 - 清泛网 - 专注IT技能提升
...由当今4位顶尖的Windows技术专家联合撰写。 书籍目录：第2版序第1版序前言...
《深入解析ATL》主要介绍了ATL技术的原理、内部实现和应用技巧，由当今4位顶尖的Windows技术专家联合撰写。
书籍目录：
第2版序
第1版序
前...
深入解析ATL - 文档下载 - 清泛网 - 专注IT技能提升
...由当今4位顶尖的Windows技术专家联合撰写。 书籍目录：第2版序第1版序前言...
《深入解析ATL》主要介绍了ATL技术的原理、内部实现和应用技巧，由当今4位顶尖的Windows技术专家联合撰写。
书籍目录：
第2版序
第1版序
前...
深入解析ATL - 文档下载 - 清泛网 - 专注IT技能提升
...由当今4位顶尖的Windows技术专家联合撰写。 书籍目录：第2版序第1版序前言...
《深入解析ATL》主要介绍了ATL技术的原理、内部实现和应用技巧，由当今4位顶尖的Windows技术专家联合撰写。
书籍目录：
第2版序
第1版序
前...