On 23 September 2010 09:31, Bruno Unna <[email protected]> wrote: > FWIW: in Perl, there are both operators as well (|| and 'or'). However, > they are *not* exactly the same. Although they can be used in any context to > render a boolean expression, their priority makes the difference. Taken from > official documentation (http://bit.ly/dgw4GT): > > Low precedence "and", "or", "xor" were introduced to permit "Perl poetry", or, more seriously, to permit control flow using a logical expression, especially after function calls without parentheses. see Naples or die; # same as: see(Napes) || die(); but not: see(Naples || die() );
No way this makes any sense in Drools. -W Binary "or" returns the logical disjunction of the two surrounding > expressions. It's equivalent to || except for the very low precedence. This > makes it useful for control flow. > > > Nonetheless, it must be taken into account that the distinction makes sense > for a Perl programmer. For a rules-writing guy (or girl) perhaps the > distinction is extremely obscure. > > Regards. > > >
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