How to use

sortBy

function

in

Array

const update = (initialValue, ...inputs) => {
  return Kefir.merge(R.splitEvery(2, inputs).map(([inputObss, foldF]) => {
    const inputObssWithIdx = inputObss.map((obs, idx) => ({ obs, idx }))
    const streams = inputObssWithIdx.filter(({ obs }) => obs instanceof Kefir.Stream)
    const properties = inputObssWithIdx.filter(({ obs }) => obs instanceof Kefir.Property)

    return Kefir.combine(
      streams.map(R.prop('obs')),
      properties.map(R.prop('obs')),
      (...args) => (prev) => foldF(prev, ...R.sortBy(R.prop('idx'), args))
    )
  })).scan((prev, update) => update(prev), initialValue)
}