On 2020-05-06 William Michels via perl6-users <perl6-us...@perl.org> wrote: > Can anyone answer why--in a one-liner using the "-pe" flag--the s/// > and tr/// functions do not require a "." (dot) preceding the function > call?
Because they're not function calls, but *mutating* operators. As the documentation says https://docs.raku.org/language/operators#s///_in-place_substitution ``s///`` is an "in-place substitution": s/// operates on the $_ topical variable, changing it in place and ``tr///`` https://docs.raku.org/language/operators#tr///_in-place_transliteration says the same: tr/// operates on the $_ topical variable and changes it in place And as usual, ``-p`` prints the value of ``$_`` at the end of each loop, so you get the modified value. -- Dakkar - <Mobilis in mobile> GPG public key fingerprint = A071 E618 DD2C 5901 9574 6FE2 40EA 9883 7519 3F88 key id = 0x75193F88
