Understood. Thankyou.
The " quotes is what I missed. So $<sol> = "@W[3]" worked as I would expect.
The other two variations, eg. $<sol> =<{ @W[3] }>, gave Nil responses,
indicating match failure.
On 13/06/2020 14:41, Brad Gilbert wrote:
Inside of a regex `{…}` will just run some regular Raku code.
Code inside of it will most likely have no effect on what the regex
matches.
What you should have written was:
$<sol> = "@W[3]"
The thing you were thinking of was:
$<sol> = <{ @W[3] }>
Which could have been written as:
<sol={ @W[3] }>
---
To have the result of regular Raku code have an effect on the match,
it has to have <…> around it
'TrueFalse' ~~ / <{ Bool.pick }> /
I think it is better if you use "…" if you are just interpolating a
variable, because that is something you might do outside of a regex as
well.
---
The reason your code matched is that an empty regex always matches.
'abc' ~~ / "" /
'abc' ~~ / {} /
'abc' ~~ / {'def'} / # still an empty regex as far as the regex
engine is concerned
On Sat, Jun 13, 2020 at 5:35 AM Richard Hainsworth
<rnhainswo...@gmail.com <mailto:rnhainswo...@gmail.com>> wrote:
I was playing with a regex and array interpolation.
From the documentation I thought the following comparisons would
be the same, but they are not.
What am I missing?
my @W = <perl weekly challenge with some extra things>;
my $S = 'perlchallengeextrathingswithweeklysome' ; #randomly concatenate
the words without spaces say 'yes' if $S ~~ /
$<sol>=( {@W[3] }) /;
say $<sol>;
my $sol = @W[3]; # with
say 'yes' if $S ~~ / $<sol>=( $sol ) /;
say $<sol>;
<response>
yes
｢｣
yes
｢with｣
