[R] separate commands by semicolon
dusa.adrian at unibuc.ro
Mon Sep 19 13:59:42 CEST 2016
On Sun, Sep 18, 2016 at 12:34 AM, Peter Langfelder <
peter.langfelder at gmail.com> wrote:
> On Sat, Sep 17, 2016 at 2:12 PM, David Winsemius <dwinsemius at comcast.net>
> > Not entirely clear. If you were intending to just get character output
> then you could just use:
> > strsplit(txt, ";")
> You would want to avoid splitting within character strings
> (print(";")) and in comments (print(2); ls() # This prints 2; then
> lists...) The comment char could also appear in a character string,
> where it does not mean the start of a comment...
Yes, that would be the problem.
Returning to my original post, modifying the example:
x <- "print(2); bar <- \"don't ; use semicolons\"; foo <- '3;4'; ls("
This should result in a character vector of length 4:
 "print(2)" "bar <- \"don't ; use semicolons\""
 "foo <- '3;4'" "ls("
even though the last command would cause an error using parse(text = x)
Perhaps this is not that important (I am trying to simulate a normal R
console), and parse only if it syntactically correct.
I was merely curious if this could be done, likely using regular
expressions (surely strsplit doesn't solve it).
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