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Refactoring Javascript code to use Transduction

I have a doubt related to transduction in functional programming
If I have an operation - arr.map(A).map(B).filter(C).filter(D).map(E).map(F)
To remove the intermediate creation of arrays, can I rewrite it as -

import _ from "lodash"

const mapReducer = (mapperFn) => (combinerFn) => (acc, val) =>
  combinerFn(acc, mapperFn(val));

const filterReducer = (predicateFn) => (combinerFn) => (acc, val) =>
  predicateFn(val) ? combinerFn(acc, val) : acc;

const push = (arr, x) => { arr.push(x); return arr }

const transducer = _.flowRight(
  mapReducer(_.flowRight(B, A)),
  filterReducer(_.flowRight(D, C)),
  mapReducer(_.flowRight(F, E))
)
arr.reduce(transducer(push), [])
about 4 years ago · Juan Pablo Isaza
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