As documented in perlop, the substitution

> Searches a string for a pattern, and if found, replaces that pattern with the replacement text and returns the number of substitutions made.

Your s/// replaced once, so it returned 1. Run the substitution before printing the result.

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

In reply to Re: One liner is returning unexpected "1" on the output and I do not understand the mechanism at play. by choroba
in thread One liner is returning unexpected "1" on the output and I do not understand the mechanism at play. by perlynewby

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