in reply to Boolean operation: (A & B) vs (A * B)

All Perl operators are documented in perlop. Relevant for this conversation:

Also, to get parser for evaluating arbitrarily complex boolean function in a string, write [id://399322] as documented in Markup in the Monastery.

#11929 First ask yourself `How would I do this without a computer?' Then have the computer do it the same way.

In Section Seekers of Perl Wisdom