In the first example, you are calling m//g in list context. In the second example, you are calling it in scalar context. The different behaviours of m//g in list and scalar context are documented in perlop.

Relevant quote:

"The /g modifier specifies global pattern matching--that is, matching as many times as possible within the string. How it behaves depends on the context. In list context, it returns a list of the substrings matched by any capturing parentheses in the regular expression. If there are no parentheses, it returns a list of all the matched strings, as if there were parentheses around the whole pattern.

"In scalar context, each execution of m//g finds the next match, returning true if it matches, and false if there is no further match."

You're relying on the scalar context behaviour, but calling it in list context.

use Moops; class Cow :rw { has name => (default => 'Ermintrude') }; say Cow->new->name

In reply to Re: While behavior by tobyink
in thread While behavior by SavannahLion

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