similar to: [WISH / PATCH] possibility to split string literals across multiple lines

On Wed, 14 Jun 2017 06:12:09 -0500, Duncan Murdoch <murdoch.duncan at gmail.com> wrote: > On 14/06/2017 5:58 AM, Andreas Kersting wrote: > > Hi, > > > > I would really like to have a way to split long string literals across > > multiple lines in R. > > I don't understand why you require the string to be a literal. Why not > construct the long

Mark, that's actually a fair statement, although your extra operator doesn't cause construction at parse time. You still call paste0(), but just add an extra layer on top of it. I also doubt that even in gigantic loops the benefit is going to be significant. Take following example: atestfun <- function(x){ y <- paste0("a very long", "string for

I don't think it is reasonable to change the parser this way. This is currently valid R code: a <- "foo" "bar" and with the new syntax, it is also valid, but with a different meaning. Or you can even consider a <- "foo" bar %>% func() %>% print() etc. I like the idea of string literals, but the C/C++ way clearly does not work. The Python/Julia way

Having some line-breaking character for string literals would have benefits as string literals can then be constructed parse-time rather than run-time. I have run into this myself a few times as well. One way to at least emulate something like that is the following. `%+%` <- function(x,y) paste0(x,y) "hello" %+% " pretty" %+% " world" -Mark Op wo 14 jun.

If you are changing the parser (which is a major change) you might consider treating strings in the C/C++ way: char *s = "A" "B"; means the same as char *s = "AB"; I am not a big fan of that syntax but it is widely used. A backslash at the end of the line leads to errors when you accidently put a space after the backslash and the editor

As I recall this has been discussed at least a few times (unfortunately I'm traveling so can't check the references), but the justification was never satisfactory. Personally, I wouldn't mind string continuation supported since it makes for more readable code (I had one of my packages raise a NOTE in examples because there is no way in R to split a long hash into multiple lines), but

On Wed, 14 Jun 2017, G?bor Cs?rdi wrote: > I don't think it is reasonable to change the parser this way. This is > currently valid R code: > > a <- "foo" > "bar" > > and with the new syntax, it is also valid, but with a different > meaning. Or you can even consider > > a <- "foo" > bar %>% func() %>% print() > >

I know it doesn't cause construction at parse time, and it was also not what I said. What I meant was that it makes the syntax at least look a little as if you have a line-breaking character within string literals. Op wo 14 jun. 2017 om 14:18 schreef Joris Meys <jorismeys at gmail.com>: > Mark, that's actually a fair statement, although your extra operator > doesn't cause

On 14/06/2017 6:45 AM, Andreas Kersting wrote: > On Wed, 14 Jun 2017 06:12:09 -0500, Duncan Murdoch <murdoch.duncan at gmail.com> wrote: > >> On 14/06/2017 5:58 AM, Andreas Kersting wrote: >>> Hi, >>> >>> I would really like to have a way to split long string literals across >>> multiple lines in R. >> >> I don't understand why

On 14/06/2017 5:58 AM, Andreas Kersting wrote: > Hi, > > I would really like to have a way to split long string literals across > multiple lines in R. I don't understand why you require the string to be a literal. Why not construct the long string in an expression like paste0("aaa", "bbb") ? Surely the execution time of the paste0 call is

Dear R-helpers: thank your for your attention. i am a newer to R and i am doing some protein category classification based on the amino acid sequence.while i have some questions urgently. 1. any packages for analysis amino acid sequence 2. given two sequences "AAA" and "BBB",how can i combine them into "AAABBB" 3. based on "AAABBB",how can i get some

Dear R-helpers: thank your for your attention. i am a newer to R and i am doing some protein category classification based on the amino acid sequence.while i have some question urgent. 1. any packages for analysis amino acid sequence 2. given two sequences "AAA" and "BBB",how can i combine them into "AAABBB" 3. based on "AAABBB",how can i get some

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