JoinSemilattice overview

A join-semilattice (or upper semilattice) is a semilattice whose operation is called join, and which can be thought of as a least upper bound.

A JoinSemilattice must satisfy the following laws:

  • Associativity: a ∨ (b ∨ c) <-> (a ∨ b) ∨ c
  • Commutativity: a ∨ b <-> b ∨ a
  • Idempotency: a ∨ a <-> a

Added in v2.0.0

Table of contents


JoinSemilattice (interface)


export interface JoinSemilattice<A> {
  readonly join: (x: A, y: A) => A

Added in v2.0.0