LiveScript implementation of Project Euler Problems

EulerProb1.ls

[0 to 1000] 
    |> filter (-> it % 3 == 0 or it % 5 == 0) 
    |> foldr1 (+)

EulerProb2.ls

{unfoldr, filter, foldr1} = require 'prelude-ls'

fibgen = (stop, {first, second}) -->
    | first > stop => null
    # returns [tobe-appended, {new-first, new-second}]
    | otherwise => [first, {first:second, second:first+second}]

export fib = (stop) -> unfoldr (fibgen stop), first:1 second:1
console.log "fibonacci under 100: #{fib 100}"

result = fib 4_000_000 
    |> filter (-> it % 2 == 0) # only even fibs
    |> foldr1 (+) # sun

console.log "project euler problem 2: #result"