• Clojure

(def r #"htt+p")

• C++

 auto r = regex("htt+p");

• C#

var r = new Regex("htt+p");

• D

auto r = regex("htt+p");

• Elixir

r = Regex.compile!("htt+p")

• Go

r := regexp.MustCompile("htt+p")

• Haskell

r :: String -> Bool
r = (=~ "htt+p")

• JS

const r = /htt+p/

• Java

Pattern r = Pattern.compile("htt+p");

• Java

Pattern r = compile("ht{2,}p");

• Lua

r = "htt+p"

• PHP

preg_match_all("/htt+p/", $r, $matches)

• Pascal

with TRegExpr.Create('htt+p') do try
finally
  free;
end;

• Perl

my $r = qr/htt+p/;

• Python

r = re.compile(r"htt+p")

• Python

r = compile('ht{2,}p')

• Ruby

r = /htt+p/

• Rust

let r = Regex::new(r"htt+p").unwrap();