passby: look into a pipe

passby.js

const passBy = by => pass => {
  by(pass)
  return pass
}

/*
  Example:
///////////////////
  const log = console.log
  const get = (attribute, target) => target[attribute]
  const getName = get('name')
  const getUser = get('user')

  const getUserName = combine(
    getName,
    passBy(log),
    getUser
  )
  const state = { user: { name: 'snitch' } }
  const name = getUserName(state)
  // log: { name: 'snitch' } }
  // name === 'snitch'
*/

https://github.com/carlesba/immootable/blob/master/src/pass-by.js