> On Dec 10, 2023, at 23:22, ToddAndMargo via perl6-users
> <perl6-users@perl.org> wrote:
>
> On 12/10/23 22:26, William Michels via perl6-users wrote:
> <SNIP>
> Hi Bill,
> Yes it does help. I am slowly getting there.
>
> If I do not know the length of the sting and have to ask
> with .chars, is there a way to use a variable in `** 7`
>
> ** $x.chars or
> my $xlen = $x.chars; `** $xlen`
>
> or some such? Is there a special syntax?
> Also, must the `**7` (does it have a name?) always be the length
> of the string?
> Also, if I do not use ^ and $, what happens?
>
> Yours in confusion,
> -T
In the Raku REPL (MoarVM 2023.05):
[3] > my $x="abc2def"; put $x.match: / ^ <alnum> ** 7 $ /;
abc2def
[3] > my $x="abc2def"; put so $x.match: / ^ <alnum> ** 7 $ /;
True
[3] > my $x="abc2def"; put $x.match: / ^ <alnum> ** {$x.chars} $ /;
abc2def
[3] > my $x="abc2def"; put $x.match: / ^ <alnum> ** {$x.chars + 1} $ /;
Use of Nil in string context
in block <unit> at <unknown file> line 1
[3] > my $x="abc2def"; say $x.match: / ^ <alnum> ** {$x.chars + 1} $ /;
Nil
[3] > my $x="abc2def"; say $x.match: / ^ <alnum> ** {$x.chars} $ /;
｢abc2def｣
alnum => ｢a｣
alnum => ｢b｣
alnum => ｢c｣
alnum => ｢2｣
alnum => ｢d｣
alnum => ｢e｣
alnum => ｢f｣
[3] > my $x="abc2def"; say so $x.match: / ^ <alnum> ** {$x.chars} $ /;
True
[3] > my $x="abc2def"; say so $x.match: / ^ <alnum> ** {$x.chars + 1} $ /;
False
[3] >
HTH, Bill.
