Variable vs. special value as exception

in reply to Re^2: pathsearch/backtracking in Perl - how to solve a problem apparently requiring it? (comparison of Perl with Standard ML)
in thread pathsearch/backtracking in Perl - how to solve a problem apparently requiring it? (comparison of Perl with Standard ML)

It's not a global, it's a static. What's not to like about it?

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Comment on Variable vs. special value as exception

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