Thank you Laurent! Are there any other "operators that modify their operands" in Raku/Perl6 that don't require an initializing "." (dot)?
I checked the "subst" command and it requires an initial ".=" when used with the "-pe" one-liner flag: mbook:~ homedir$ perl6 -pe '.=subst(/love|like/, "admire"); ' demo1.txt this is a test, I admire Unix, I admire Linux too, mbook:~ homedir$ Thanks in advance, Bill. On Wed, May 6, 2020 at 3:18 PM Laurent Rosenfeld <laurent.rosenf...@googlemail.com> wrote: > > The s/// substitution operator is not a method (and tr/// also not). They > both modify their operands, so there is no need anyway for a '.=' syntax, > since they do already what the '.=' syntax is aimed at. > > Cheers, > Laurent. > > Garanti sans virus. www.avast.com > > Le mer. 6 mai 2020 à 23:11, William Michels <w...@caa.columbia.edu> a écrit : >> >> Hello, >> >> 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? Clearly adding a "." (dot) before either one results in an error >> (code below). Also, adding a ".=" (dot-equals) sign before the either >> the s/// or the tr/// function results in an error (code below). >> Additionally, I would like to know if this is a related-or-different >> issue compared to the question I posted earlier this week. >> >> Any explanation or assistance appreciated, >> >> Thank you, Bill. >> >> mbook:~ homedir$ cat demo1.txt >> this is a test, >> I love Unix, >> I like Linux too, >> mbook:~ homedir$ >> >> mbook:~ homedir$ perl6 -pe 's/love|like/admire/; ' demo1.txt >> this is a test, >> I admire Unix, >> I admire Linux too, >> mbook:~ homedir$ perl6 -pe '.s/love|like/admire/; ' demo1.txt >> ===SORRY!=== Error while compiling -e >> Missing required term after infix >> at -e:1 >> ------> .s/love|like/admire/; >> expecting any of: >> prefix >> term >> mbook:~ homedir$ perl6 -pe '.=s/love|like/admire/; ' demo1.txt >> ===SORRY!=== Error while compiling -e >> Missing required term after infix >> at -e:1 >> ------> .=s/love|like/admire/; >> expecting any of: >> prefix >> term >> mbook:~ homedir$ >> >> mbook:~ homedir$ perl6 -pe 'tr/aeiou/12345/;' demo1.txt >> th3s 3s 1 t2st, >> I l4v2 Un3x, >> I l3k2 L3n5x t44, >> mbook:~ homedir$ perl6 -pe '.tr/aeiou/12345/;' demo1.txt >> ===SORRY!=== Error while compiling -e >> Missing required term after infix >> at -e:1 >> ------> .tr/aeiou/12345/; >> expecting any of: >> prefix >> term >> mbook:~ homedir$ perl6 -pe '.=tr/aeiou/12345/;' demo1.txt >> ===SORRY!=== Error while compiling -e >> Missing required term after infix >> at -e:1 >> ------> .=tr/aeiou/12345/; >> expecting any of: >> prefix >> term >> mbook:~ homedir$
