Perl 5 version 14.3 documentation
- unshift EXPR,LIST
- unshift(@ARGV, '-e') unless $ARGV =~ /^-/;
Note the LIST is prepended whole, not one element at a time, so the prepended elements stay in the same order. Use
reverseto do the reverse.
Starting with Perl 5.14,
unshiftcan take a scalar EXPR, which must hold a reference to an unblessed array. The argument will be dereferenced automatically. This aspect of
unshiftis considered highly experimental. The exact behaviour may change in a future version of Perl.