On 10/01/2017 09:17 AM, Brandon Allbery wrote:
(b d)
What does the ".succ" do?
In this case it's just an example of an expression that wouldn't have
worked by normal interpolation (although $v.succ() would have, as I
described earlier).
succ is short for "successor"; think of it as the generalized version of
adding 1 to something. In Perl 6, it can be used (but ideally shouldn't)
on numbers, or to get the next element of an Enum (note that this might
not necessarily correspond to its numeric value plus one), or as in this
case to get the next notional "value" of a string: this is a somewhat
rationalized version of Perl 5's "magic autoincrement" and is described
at https://docs.perl6.org/type/Str#method_succ . It's useful, especially
in the form of the ++ autoincrement operator, for autogenerating filenames.
pyanfar Z$ 6 'my $x = "file1.txt"; say $x.succ'
file2.txt
Sweet! Perl 6 thinks of EVERYTHING.
Thank you!
