From @zoffixznet

When looking up something with `[...]` postcircumfix, you can add more postcircumfixes to index the result​:

  $ perl6 -e 'dd <a b c>[*][1]'
  "b"

But this silently gives wrong results if adverbs are present as well​:

  $ perl6 -e 'dd <a b c>[*]​:p[1]'
  (0 => "a", 1 => "b", 2 => "c")
  $ perl6 -e 'dd <a b c>[*]​:v[1]'
  ("a", "b", "c")
  $ perl6 -e 'dd <a b c>[*]​:exists[1]'
  (Bool​::True, Bool​::True, Bool​::True)
  $ perl6 -e 'dd <a b c>[*]​:p[10000000000000000000000000000000000]'
  (0 => "a", 1 => "b", 2 => "c")
 
  $ perl6 -e 'dd <a b c>[*]​:delete[1]'
  (Failure.new(exception => X​::AdHoc.new(payload => "Can not remove elements from a List"), backtrace => Backtrace.new), Failure.new(exception => X​::AdHoc.new(payload => "Can not remove elements from a List"), backtrace => Backtrace.new), Failure.new(exception => X​::AdHoc.new(payload => "Can not remove elements from a List"), backtrace => Backtrace.new))
 

From @zoffixznet

On Tue, 09 May 2017 10​:41​:57 -0700, cpan@​zoffix.com wrote​:

When looking up something with `[...]` postcircumfix, you can add more
postcircumfixes to index the result​:

$ perl6 -e 'dd <a b c>[*][1]'
"b"

But this silently gives wrong results if adverbs are present as well​:

$ perl6 -e 'dd <a b c>[*]​:p[1]'
(0 => "a", 1 => "b", 2 => "c")
$ perl6 -e 'dd <a b c>[*]​:v[1]'
("a", "b", "c")
$ perl6 -e 'dd <a b c>[*]​:exists[1]'
(Bool​::True, Bool​::True, Bool​::True)
$ perl6 -e 'dd <a b c>[*]​:p[10000000000000000000000000000000000]'
(0 => "a", 1 => "b", 2 => "c")

$ perl6 -e 'dd <a b c>[*]​:delete[1]'
(Failure.new(exception => X​::AdHoc.new(payload => "Can not remove
elements from a List"), backtrace => Backtrace.new),
Failure.new(exception => X​::AdHoc.new(payload => "Can not remove
elements from a List"), backtrace => Backtrace.new),
Failure.new(exception => X​::AdHoc.new(payload => "Can not remove
elements from a List"), backtrace => Backtrace.new))

Everything works right. I was just too deep into list adverbs and the fact that `​:p[1]` is the syntax for array pair slipped my mind :)

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