http://qs1969.pair.com?node_id=1227589


in reply to Declare my variable in sysread - Mojo::File::slurp

You say you've never seen this before, but you've done in a million times. Just look at the previous line of your code.

open my $file, ...

my $var not only declares the variable at compile-time, it also returns the variable (as an lvalue) as if you had simply written $var.