Module

Data.Eq

Package: purescript-prelude
Repository: purescript/purescript-prelude

#Eq Source

class Eq a  where

The Eq type class represents types which support decidable equality.

Eq instances should satisfy the following laws:

Reflexivity: x == x = true
Symmetry: x == y = y == x
Transitivity: if x == y and y == z then x == z

Note: The Number type is not an entirely law abiding member of this class due to the presence of NaN, since NaN /= NaN. Additionally, computing with Number can result in a loss of precision, so sometimes values that should be equivalent are not.

Members

eq :: a -> a -> Boolean

Instances

Eq Boolean
Eq Int
Eq Number
Eq Char
Eq String
Eq Unit
Eq Void
(Eq a) => Eq (Array a)

#(==) Source

Operator alias for Data.Eq.eq (non-associative / precedence 4)

#notEq Source

notEq :: forall a. Eq a => a -> a -> Boolean

notEq tests whether one value is not equal to another. Shorthand for not (eq x y).

#(/=) Source

Operator alias for Data.Eq.notEq (non-associative / precedence 4)

#Eq1 Source

class Eq1 f  where

The Eq type class represents type constructors with decidable equality.

Members

eq1 :: forall a. Eq a => f a -> f a -> Boolean

Instances

Eq1 Array

#notEq1 Source

notEq1 :: forall a f. Eq1 f => Eq a => f a -> f a -> Boolean