fp-bullshit.js

// Don't do functional programming in JS. It's wasteful.
var shoppingCart = [ { price: 12.99 }, { price: 5.99 }, { price: 3.10 } ]

// Loops twice and does two function calls per iteration.
var fpSum = shoppingCart
  .map(function (product) { return product.price })
  .reduce(function (accumulator, price) { return accumulator + price }, 0)

// One loop, no unnecessary function calls.
var i, j, impSum = 0
for (i = 0, j = shoppingCart.length; i < j; i++)
  impSum += shoppingCart[i].price