tiny little transducer util made with universal-reduce

transducer.js

import reduce from 'universal-reduce'

const transduce = (put, initial) => (collection, ...xfs) =>
  reduce(collection, (accum, value, key) =>
    put(
      accum,
      key,
      reduce(xfs, (result, xf) => xf(result), value)
    ),
    initial
  )
  
  // example 
  
const mapObjectValuesIntoSet = transduce((set, value) => set.add(value), new Set())
  
mapObectValuesIntoSet({
  book1: 'Tale of Two Cities',
  book2: 'Anathem',
  book3: 'Saved By The Bell: The Inside Story'
}, str => str.toLowerCase())
  
// returns
// Set { 'tale of two cities', 'anathem', 'saved by the bell: the inside story' }