168: Highlights
- If you want to combine two Boolean expressions, and the result is to
be
true
if the values of both expressions are true
,
then send the first Boolean expression the &
message with the
second Boolean expression as an argument.
- If you want to combine two Boolean expressions, and the result is to
be
true
if the value of either expression is true
,
then send the first Boolean expression the |
message with the
second Boolean expression as an argument.
- If you want to combine two Boolean expressions, and the result is to
be
true
if the values of both expressions are true
,
and you want to prevent wasted computation, then send the first
Boolean expression the and:
message with the second Boolean
expression embedded in a block argument.
- If you want to combine two Boolean expressions, and the result is to
be
true
if the value of either expression is true
,
and you want to prevent wasted computation, then send the first
Boolean expression the or:
message with the second Boolean
expression embedded in a block argument.