Bool.Extra

Convenience functions for working with Bools

Basics

all : List Bool -> Bool

All the bools are true.

all [ True, True ]
--> True


all [ True, False ]
--> False


all [ False, False ]
--> False

none : List Bool -> Bool

None of the bools are true.

none [ True, True ]
--> False


none [ True, False ]
--> False


none [ False, False ]
--> True

any : List Bool -> Bool

At least one of the bools is true.

any [ True, True ]
--> True


any [ True, False ]
--> True


any [ False, False ]
--> False

notAll : List Bool -> Bool

Not all of them are true

notAll [ True, True ]
--> False


notAll [ True, False ]
--> True


notAll [ False, False ]
--> True

allPass : List (a -> Bool) -> a -> Bool

Determine if all predicates are satisfied by the value.

allPass [ (>) 20, (<) 10 ] 11
--> True


allPass [ (>) 20, (<) 10 ] 21
--> False


allPass [ (>) 20, (<) 10 ] 4
--> False


allPass [] 21
--> True

anyPass : List (a -> Bool) -> a -> Bool

Determine if any predicate is satisfied by the value.

anyPass [ (>) 20, (<) 10 ] 100
--> True


anyPass [ (>) 20, (==) 10 ] 21
--> False


anyPass [] 21
--> False

toMaybe : a -> Bool -> Maybe a

Take a value, and wrap it with Just from a Bool

toMaybe 4 True
--> Just 4


toMaybe 4 False
--> Nothing

toString : Bool -> String

Turn a bool into a string

toString True
--> "True"


toString False
--> "False"