Just a hint

> (And yes, I do use the the duo on most every script I write-just not always on "one-liners".)

well you could set up an alias psw=perl -Mstrict -Mwarnings if you think that you'd really go to declare variables.

IIRC there was also a possibility to globally require a a piece of Perl code whenever your installation runs.

update

> where "-Mstrict -Mwarnings" would have added a mere 19 characters in length

or see perlrun#PERL5OPT: "Switches in this variable are treated as if they were on every Perl command line."

C:\>set PERL5OPT=-w -Mstrict

C:\>perl -e"print $x"
Global symbol "$x" requires explicit package name (did you forget to d
+eclare "my $x"?) at -e line 1.
Execution of -e aborted due to compilation errors.
[download]

though you might prefer to avoid strict vars in one-liners

C:\>set PERL5OPT=-w -Mstrict=refs,subs

C:\>perl -e"print $x"
Name "main::x" used only once: possible typo at -e line 1.
Use of uninitialized value $x in print at -e line 1.
[download]

comming back to your original case

C:\>perl -le "my $str = q{zxcv}; if ( $str -~ m/some pattern/i ) { pri
+nt $str; }"
Use of uninitialized value $_ in pattern match (m//) at -e line 1.
Argument "zxcv" isn't numeric in subtraction (-) at -e line 1.
zxcv
[download]