To curry or not curry, that is the question

README.md

Comparing 2 implementations of the same function, with and without currying.

To be run from Ramda playground: http://ramdajs.com/repl/

with-curry.js

const users  = [ {
  name: 'Larry', 
  meals: [{ date: new Date()}]
}]

const hasCreatedMeals = R.curry(
  (count, period, user) => {
    const meals = user.meals.filter(
      meal => meal.date >= period.startDate && meal.date <= period.endDate
    )
    return meals.length >= count
  }
)

const period = { startDate: new Date(), endDate: new Date() }

const getUsers = R.filter(hasCreatedMeals(1, period))

R.compose(
  R.map(R.prop('name')),
  getUsers
)(users) 

without-curry.js

const users  = [ {
  name: 'Larry', 
  meals: [{ date: new Date()}]
}]

const hasCreatedMeals = count => period => user => {
  const meals = user.meals.filter(
    meal => meal.date >= period.startDate && meal.date <= period.endDate
  )
  return meals.length >= count
}

const period = { startDate: new Date(), endDate: new Date() }
const getUsers = R.filter(hasCreatedMeals(1)(period))

R.compose(
  R.map(R.prop('name')),
  getUsers
)(users)