in reply to Evaluate variable while using

The problem is that 
my $str = "Hello ".$a;

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populates $str using the current value of $a. $str doesn't remember $a was used to construct it, so changing $a doesn't have any influence on its value.

map{substr$_->[0],$_->[1]||0,1}[\*||{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^*ARGV,3]

In Section Seekers of Perl Wisdom