id -package:invertible

Identity function.
id x = x
the identity morphism
Combinator for the id attribute. Example:
div ! id "bar" $ "Hello."
Result:
<div id="bar">Hello.</div>
the identity morphism
the identity morphism
Identity function.
id x = x
The ID scalar type represents a unique identifier, often used to refetch an object or as key for a cache. The ID type appears in a JSON response as a String; however, it is not intended to be human-readable. When expected as an input type, any string (such as "4") or integer (such as 4) input value will be accepted as an ID.
The identity function. This is useful when tying the knot, to avoid a loop that bottoms out:
let x = x in RB.get x
will not work, but
>>> let x = RB.id x in RB.get x
False
does.
RB.get (RB.id r) === RB.get r