Function toggle_

packages/effect-app/src/Set.ts:497–502

(E: Equivalence.Equivalence<A>)

 * If element is present remove it, if not add it
 */
export function toggle_<A>(E: Equivalence.Equivalence<A>): (set: Set<A>, a: A) => Set<A> {
  const elemE = elem_(E)
  const removeE = remove(E)
  const insertE = insert(E)
  return (set, a) => (elemE(set, a) ? removeE : insertE)(a)(set)
}

/**
 * Create a set from an array