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Assign multiple columns using := in data.table, by group
... modify the following line in order to get two columns for each objectName from the dim output, rather than one column with two rows? data.table(objectName=ls())[,c("rows","cols"):=dim(get(objectName)),by=objectName] (I'm using data.table 1.8.11)
– dnlbrky
May ...
Overlaying histograms with ggplot2 in R
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where does f0 come from?
– Alan
Jun 11 at 15:58
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How to split a sequence into two pieces by predicate?
...ments in one list until an element is "false" (in terms of the predicate). From that point forward, it will put the elements in the second list.
scala> Seq(1,2,3,4).span(x => x % 2 == 0)
res0: (Seq[Int], Seq[Int]) = (List(),List(1, 2, 3, 4))
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How do I write a short literal in C++?
...the writers of the C99 standard got caught out by this. This is a snippet from Danny Smith's public domain stdint.h implementation:
/* 7.18.4.1 Macros for minimum-width integer constants
Accoding to Douglas Gwyn <gwyn@arl.mil>:
"This spec was changed in ISO/IEC 9899:1999 TC1; in IS...
Storing R.drawable IDs in XML array
...wer_home</item>
</integer-array>
You will get array of Image from the resource as TypedArray
val imageArray = resources.obtainTypedArray(R.array.drawer_icons)
get resource ID by the index
imageArray.getResourceId(imageArray.getIndex(0),-1)
OR you can set imageView's resource to ...
Setting the Vim background colors
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@Marin: put exactly the line from the example into your vimrc :highlight Normal ctermfg=grey ctermbg=darkblue. Sub in whatever colours you want.
– Matthew
Apr 16 '13 at 17:52
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Keyword for the outer class from an anonymous inner class [duplicate]
...bility would have been if you had tried to create an anonymous inner class from static method. But if you try to use "a.this" in that case, you will get a compiler error.
– rents
Apr 16 '17 at 21:03
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解决 A potentially dangerous Request.Form value was detected from the ...
解决 A potentially dangerous Request.Form value was detected from the client 错误potentially-dangerous-RequestrequestValidationMode validateRequest近日有客户在升级到Windows 2012 Server后，发现部分表单无法保存，经测试是由于使用了ASP.NET 4.0，默认安全性设置...
解决 A potentially dangerous Request.Form value was detected from the ...
解决 A potentially dangerous Request.Form value was detected from the client 错误potentially-dangerous-RequestrequestValidationMode validateRequest近日有客户在升级到Windows 2012 Server后，发现部分表单无法保存，经测试是由于使用了ASP.NET 4.0，默认安全性设置...
解决 A potentially dangerous Request.Form value was detected from the ...
解决 A potentially dangerous Request.Form value was detected from the client 错误potentially-dangerous-RequestrequestValidationMode validateRequest近日有客户在升级到Windows 2012 Server后，发现部分表单无法保存，经测试是由于使用了ASP.NET 4.0，默认安全性设置...