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import { clone } from './clone.js'import { curry } from './curry.js'import { has } from './has.js'import { reduce } from './reduce.js'
function reduceByFunction(  valueFn, valueAcc, keyFn, acc, elt){  const key = keyFn(elt)  const value = valueFn(has(key, acc) ? acc[ key ] : clone(valueAcc), elt)
  acc[ key ] = value
  return acc}
export function reduceByFn(  valueFn, valueAcc, keyFn, list){  return reduce(    (acc, elt) => reduceByFunction(      valueFn, valueAcc, keyFn, acc, elt    ),    {},    list  )}
export const reduceBy = curry(reduceByFn)