在“一行上声明，条件并返回全部”

Question

是否可以将以下函数的内部写为一行？我想要一种不必声明check的方法。

function Example {
    const check = this.readByUuidCheck(props)
    if (check) return this.readByUuid(check)
}

我正在寻找一种减少重复的方法：

function Example {
    const check = this.readByUuidCheck(props)
    if (check) return this.readByUuid(check)

    const alpha = this.alphaCheck(props)
    if (alpha) return this.alpha(alpha)

    const beta = this.betaCheck(props)
    if (beta) return this.beta(beta)

    const gamma = this.gammaCheck(props)
    if (gamma) return this.gamma(gamma)
}

Answer 1

我接受了这种抽象：

function manage <T extends (...args: any) => any>(checker, method: T): (props:any) => ReturnType<T> {
  return (props: any) => { 
    const check = checker(props)
    if (check) return method(check)
    throw new Error('Unable to run')
  }
}

  function resolve(props:
    Props<ContactService['readById']> |
    Props<ContactService['readByUuid']> |
    Props<ContactService['readByUser']> |
    Props<ContactService['lookupOrUpsert']> |
    Props<ContactService['upsertOwnedByUser']> |
    Props<ContactService['handleCreateMemberArgs']> |
    Props<ContactService['handleCreateMemberArgsAlt']>
  ): Promise<[Contact, 'read' | 'create' | 'update' | null]> {
    return helper.compose.first(
      manage(this.readByIdCheck, this.readById),
      manage(this.readByUuidCheck, this.readByUuid),
      manage(this.readByUserCheck, this.readByUser),
      manage(this.lookupOrUpsertCheck, this.lookupOrUpsert),
      manage(this.upsertOwnedByUserCheck, this.upsertOwnedByUser),
      manage(this.handleCreateMemberArgsCheck, this.handleCreateMemberArgs),
      manage(this.handleCreateMemberArgsAltCheck, this.handleCreateMemberArgsAlt),
      helper.compose.error(new Error('unable to resolve contact'))
    )()
  }