• NAME
• SYNOPSIS
• DESCRIPTION

NAME

hashiter - allow destructive hash iterators

SYNOPSIS

    use hashiter;
    while (($key, $val)=each %hash){ delete $hash{$key} unless $val; }
    no hashiter;

DESCRIPTION

This is a new user-pragma since cperl-5.29.0 to allow destructive changes of hash keys while iterating over the hash.

Without use hashiter, deletion and insertion of hash keys during iteration over this hash is forbidden, even the old perl lazydel scheme.