On Mon, 10 Jan 2022 15:41:04 +0000 Richard Hainsworth <rnhainswo...@gmail.com> wrote:
> Using REPL I got > > > my $s = '\'<favicon />\'' > '<favicon />' > > $s.subst( / \' ~ \' (.+) /, $0) > Use of Nil in string context > in block <unit> at <unknown file> line 1 That error message (which is a bit LTA) refers to the `$0`. As https://docs.raku.org/routine/subst#Callable shows, you need to write: $s.subst( / \' ~ \' (.+) /, { $0 }) > > my $t = '{<favicon />}' > {<favicon />} > > $t.subst( / \{ ~ \} (.+) /, $0) > <favicon /> This only appear to work because you're running it in the same REPL session; the previous `subst` had the side-effect of setting `$0` (well, it sets `$/`, but `$0` is an alias for `$/[0]`…) -- Dakkar - <Mobilis in mobile> GPG public key fingerprint = A071 E618 DD2C 5901 9574 6FE2 40EA 9883 7519 3F88 key id = 0x75193F88
