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App Inventor 2 文件操作教程 - 创建/读取/写入/管理文件 · App Inventor 2 中文网
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App Inventor 2 字符串操作教程 - 拆分、截取与高级文本处理 · App Inventor 2 中文网
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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...
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...
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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Scala 2.8 breakOut
In Scala 2.8 , there is an object in scala.collection.package.scala :
4 Answers
4
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pass string parameter in an onclick function
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24 Answers
24
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How to use sidebar with the keyboard in Sublime Text 2 and 3?
When using Sublime Text 2 we tend to open the side bar to navigate thru files/folders in our projects. For that we can use the hotkey ctrl+k ctrl+b (in windows).
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