Haskell:

Following the three ways to define "&&" on slides 6--7 of chapter 4, show the analogous three ways how the disjunction operator "||" can be defined using pattern matching

Slides:

unctions can often be defined in many different rays using pattern matching. For example (\&\&) : : Bool Bool Bool True \&\& True = True True \&\& Fa7se = False False \&\& True = False False \&\& False = False an be defined more compactly by True&&True&&=True=False However, the following definition is more efficient, because it avoids evaluating the second argument if the first argument is False: True&&b=bFalse&&-=False Note: - The underscore symbol _ is a wildcard pattern that matches any argument value