R devel - Nov 2005 - strsplit ignores empty fields (PR#8271)

Full_Name: Tim Beissbarth
Version: 2.2.0
OS: Windows
Submission from: (NULL) (193.174.58.254)


strsplit ignores empty strings at the end. 
> strsplit(paste(c("", "a", ""),
collapse="#"), split="#", fixed=TRUE)
[[1]]
[1] ""  "a"

This should really give:
[1] ""  "a"  ""

Some might say this is a feature, but strsplit should be the reverse of paste, I
think.

A workaround would be to append # onto the end of the string:
> s <- c("abc#def", "abc#", "#def")
> ss <- paste(s, "#", sep = "")
> strsplit(ss, "#")
[[1]]
[1] "abc" "def"

[[2]]
[1] "abc" ""

[[3]]
[1] ""    "def"


On 11/1/05, beissbarth at wehi.edu.au <beissbarth at wehi.edu.au>
wrote:
> Full_Name: Tim Beissbarth
> Version: 2.2.0
> OS: Windows
> Submission from: (NULL) (193.174.58.254)
>
>
> strsplit ignores empty strings at the end.
>
> > strsplit(paste(c("", "a", ""),
collapse="#"), split="#", fixed=TRUE)
> [[1]]
> [1] ""  "a"
>
> This should really give:
> [1] ""  "a"  ""
>
> Some might say this is a feature, but strsplit should be the reverse of
paste, I
> think.
>
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