Source: netAfter.js

  1. import { curry } from 'ramda'
  3. /**
  4.  * Calculate the net amount after apply a tax.
  5.  * <br>
  6.  * is currified
  7.  *
  8.  * @sig Function -> Number -> Number
  9.  * @param {Function} tax to be applied
  10.  * @param {Number} amount gross value
  11.  * @return {Number} net value after tax
  12.  *
  13.  * @example
  14.  *
  15.  * netAfter(rateAt(0.2), 1000) //=> 800
  16.  * netAfter(rateAt(0.2))(1000) //=> 800
  17.  *
  18.  */
  19. let netAfter = (tax, amount) => amount - tax(amount)
  20. netAfter = curry(netAfter)
  21. export { netAfter }