a-smaller-3.js

const generateQuery = (params, callbacks) => {
  let query = {}

  try {
    callbacks.forEach(c => {
      query = c(query, params)
    })
  } catch(err) {
    // error handing
  }

  return query
}

const result = generateQuery({ email: '[email protected]', maxAge: 20 }, [email, maxAge, limit])