function wrap to chain lodash/underscore/whatever functions with plain js class methods

index.js

import { compact, uniq, take } from 'lodash'

const wrap = function (fn, ...args) {
  return fn(this, ...args)
}


const exampleData = [
  { date: '03/12/2012', text: '12 марта' },
  { date: '03/13/2012', text: '13 марта' },
  { date: '04/12/1961', text: '12 апреля' },
  null,
  { date: '06/22/2014', text: '12 июля' },
]

const getDateProp = obj => obj.date
const getYear = dateString => (new Date(dateString)).getFullYear()

// before:
// hard to read and understand
// const result = take(uniq(compact(exampleData).map(getDateProp).map(getYear)).sort(), 2)

// after:
// readable and easy to understand
// customisable
const result = exampleData
  ::wrap(compact)
  .map(getDateProp)
  .map(getYear)
  ::wrap(uniq)
  .sort()
  ::wrap(take, 2)

console.log(result) // [1961, 2012]