Realm v0.1.0 Realm.Setoid protocol View Source
A setoid is a type with an equivalence relation.
This is most useful when equivalence of some data is not the same as equality.
Since some types have differing concepts of equality, this allows overriding
the behaviour from Kernel.==/2
. To get the Setoid ==
operator override,
simply use Realm.Setoid
.
Type Class
An instance of Realm.Setoid
must define Realm.Setoid.equivalent?/2
Setoid [equivalent?/2]
Link to this section Summary
Functions
Compare two setoids and determine if they are equivalent.
Aliased as ==
.
Link to this section Types
Link to this section Functions
Compare two setoids and determine if they are equivalent.
Aliased as ==
.
Examples
iex> equivalent?(1, 2)
false
iex> import Kernel, except: [==: 2, !=: 2]
...> %{a: 1} == %{a: 1, b: 2}
false
equivalent?(%Maybe.Just{just: 42}, %Maybe.Nothing{})
#=> false
Equivalence not equality
baby_harry = %Wizard{name: "Harry Potter", age: 10}
old_harry = %Wizard{name: "Harry Potter", age: 17}
def chosen_one?(some_wizard), do: equivalent?(baby_harry, some_wizard)
chosen_one?(old_harry)
#=> true