Re: global string replace

Use a look-ahead assertion. It looks ahead, but doesn't advance the position:

  s/(^|\*)X(?=\*|$)/$1$NEW/g
#          ~~~
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map{substr$_->[0],$_->[1]||0,1}[\*||{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^*ARGV,3]

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