Raku
Need a simple example of inverting @a to a Hash by reversing its keys and values
I suggest breaking this existing doc verbiage (from https://docs.raku.org/type/List#routine_invert) where I've inserted a â–²:
Assumes every element of the List is a L<C<Pair>|/type/Pair>. Returns all elements as a L<C<Seq>|/type/Seq> of L<C<Pair>|/type/Pair>s where the keys and values have been exchanged. â–² If the value of a L<C<Pair>|/type/Pair> is an L<C<Iterable>|/type/Iterable>, then it will expand the values of that L<C<Iterable>|/type/Iterable> into separate pairs.
by inserting this code:
my @a = <list of four strings>;
say @a.pairs.invert.hash; # {list => 0, four => 2, of => 1, strings => 3}
Or perhaps instead add:
my @a = <list of four strings>;
say @a.antipairs.hash; # {list => 0, four => 2, of => 1, strings => 3}
to the antipairs doc?
On Sat, Mar 1, 2025 at 18:10 raiph @.***> wrote:
I suggest breaking this existing doc verbiage (from https://docs.raku.org/type/List#routine_invert) where I've inserted a â–²:
Assumes every element of the List is a L<C|/type/Pair>. Returns all elements as a L<C|/type/Seq> of L<C|/type/Pair>s where the keys and values have been exchanged. â–² If the value of a L<C|/type/Pair> is an L<C|/type/Iterable>, then it will expand the values of that L<C|/type/Iterable> into separate pairs.
by inserting this code:
my @a =
; say @a.pairs.invert.hash; # {array => 0, four => 2, of => 1, strings => 3} If you're OK with that I'll do a doc PR/commit for it.
— Reply to this email directly, view it on GitHub https://github.com/Raku/doc/issues/4561#issuecomment-2692480566, or unsubscribe https://github.com/notifications/unsubscribe-auth/AAH5VVGHSAAXYYKV2I7DIGD2SJD63AVCNFSM6AAAAABYEL6PCGVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDMOJSGQ4DANJWGY . You are receiving this because you authored the thread.Message ID: @.***> [image: raiph]raiph left a comment (Raku/doc#4561) https://github.com/Raku/doc/issues/4561#issuecomment-2692480566
I suggest breaking this existing doc verbiage (from https://docs.raku.org/type/List#routine_invert) where I've inserted a â–²:
That would be very useful, thank you!
I think the .antipairs method alone is the best way to show the way. Maybe just improve its indexing in the docs.