Method optionalKey

packages/effect/src/Optic.ts:994–1017

(key: PropertyKey)

    return make(compose(this.node, [new PathNode([key])]))
  }
  optionalKey(key: PropertyKey): any {
    return make(
      compose(
        this.node,
        primitiveNode(
          "Lens",
          (s) => s[key],
          (a, s) => {
            const copy = cloneShallow(s)
            if (a === undefined) {
              if (Array.isArray(copy) && typeof key === "number") {
                copy.splice(key, 1)
              } else {
                delete copy[key]
              }
            } else {
              InternalRecord.assignProperty(copy, key, a)
            }
            return copy
          }
        )
      )
    )
  }
  check(...checks: readonly [SchemaAST.Check<any>, ...Array<SchemaAST.Check<any>>]): any {
    return make(compose(this.node, [new CheckNode(checks)]))
  }