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Pandas dataframe get first row of each group
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248
>>> df.groupby('id').first()
value
id
1 first
2 first
3 first
4...
How can I obtain an 'unbalanced' grid of ggplots?
..., arrangeGrob(p,p,p, heights=c(3/4, 1/4, 1/4), ncol=1),
ncol=2)
Edit (07/2015): with v>2.0.0 you can use the layout_matrix argument,
grid.arrange(p,p,p,p, layout_matrix = cbind(c(1,1,1), c(2,3,4)))
shar...
Pretty printing JSON from Jackson 2.2's ObjectMapper
...and I can't seem to find the proper, non-deprecated way of doing this with 2.2. Even though I don't believe that code is absolutely necessary for this question, here's what I have right now:
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Scala 2.8 breakOut
In Scala 2.8 , there is an object in scala.collection.package.scala :
4 Answers
4
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What does the “map” method do in Ruby?
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432
The map method takes an enumerable object and a block, and runs the block for each element, outp...
Returning value from called function in a shell script
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282
A Bash function can't return a string directly like you want it to. You can do three things:
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Pairwise crossproduct in Python [duplicate]
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You're looking for itertools.product if you're on (at least) Python 2.6.
>>> import itertools
>>> a=[1,2,3]
>>> b=[4,5,6]
>>> itertools.product(a,b)
<itertools.product object at 0x10049b870>
>>> list(itertools.product(a,b))
[(1, 4), (1, 5), ...
C# '@' before a String [duplicate]
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answered Feb 2 '11 at 19:54
Mark AveniusMark Avenius
12.6k66 gold badges3636 silver badges4848 bronze badges
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当当网第三季度净亏损2810万元 同比由盈转亏 - 资讯 - 清泛网 - 专注C/C++及内核技术
当当网第三季度净亏损2810万元 同比由盈转亏11月25日消息，当当网发布了截至2015年9月30日的2015财年第三季度未审计财报。财报显示，当当网第三季度总净营收为23.719亿元人民币(约合3.732亿美元)，同比增长22.6%；净亏损为2810万元...
CentOS系统下如何挂载第2块磁盘 - 更多技术 - 清泛网 - 专注C/C++及内核技术
CentOS系统下如何挂载第2块磁盘1、查看新硬盘 # fdisk -l新添加的硬盘的编号为 dev sdb 2、硬盘分区 1）进入fdisk模式 # fdisk dev sdb2）输入n进行分区...1、查看新硬盘
# fdisk -l
新添加的硬盘的编号为/dev/sdb
2、硬盘分区
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