Function insert_

packages/effect-app/src/Set.ts:458–469

(E: Equivalence.Equivalence<A>)

 * Insert a value into a set
 */
export function insert_<A>(E: Equivalence.Equivalence<A>): (set: Set<A>, a: A) => Set<A> {
  const elemE = elem_(E)
  return (set, a) => {
    if (!elemE(set, a)) {
      const r = new Set(set)
      r.add(a)
      return r
    } else {
      return set
    }
  }
}

/**
 * Delete a value from a set