Pasting list inside a URL using R -


i playing around apis , have simple question. how paste comma separated list after = in url below instead of writing manually?

library(httr)  x <- get("url/?query=")

in other words, given list l i'd end with:

x <- get("url/?query=a,b,c,d")

thanks!

update l looks like:

> dput(l) list("a","b","c","d")

this safer , saner way build/pass query strings:

library(httr)  res <- get(url = "http://httpbin.org/get",            query = list(              query = paste0(list("a","b","c","d"), collapse=",")            ))  str(content(res, as="parsed")) ## list of 4 ##  $ args   :list of 1 ##   ..$ query: chr "a,b,c,d" ##  $ headers:list of 5 ##   ..$ accept         : chr "application/json, text/xml, application/xml, */*" ##   ..$ accept-encoding: chr "gzip, deflate" ##   ..$ connection     : chr "close" ##   ..$ host           : chr "httpbin.org" ##   ..$ user-agent     : chr "libcurl/7.51.0 r-curl/2.3 httr/1.2.1" ##  $ origin : chr "50.252.233.22" ##  $ url    : chr "http://httpbin.org/get?query=a%2cb%2cc%2cd"

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