You are right, the shortest awk is one byte. Please post the link all nine variants I wasn't able to Google it.
Still the shortest Perl is 0 bytes when the command line switch is allowed to be -p
Update: That's actually called "the sed mode of Perl." Moreover these two command lines behave similarly:
perl -pe 's/search/replace/g'
sed 's/search/replace/'SED is shorter (0 byte). SED /is/ a turing complete language [1] so don't try to claim that I'm cheating.
sed < input > output
[1] http://robertkotcher.com/sed.html
[update] s/set/sed/
The command line equivalent, with Perl:
perl -pe '' <input >output
Re:Copying stdin to stdout in Java
by Alphasite_ on Wednesday March 26, 2014 @06:07AM
(#7472471)
Even java can do that setOut(system.in); (iirc)
> Even java can do that setOut(system.in);
I was referring to an empty SED-program that would then be run via 'sed -f empty-file.sed'. Of course you need >0 bytes to invoke the SED program.
By default, unless you use the BEGIN block or something, awk will run your program on each line of stdlin. This is useful for programs of the type:
(/some regular expression/) { some action}
The default action if you don't specify one is "print $0" (the whole matching line). If your condition is a plain-ol' expression rather than a regular expression, and it always evaluates truthy, you thus get every line.