Source code in the coffeescript programming language

double = [1,2,3].map (x) -> x*2


fn = -> return 8
sum = (a, b) -> a() + b()
sum(fn, fn) # => 16


bowl = ["Cheese", "Tomato"]

smash = (ingredient) ->
    return "Smashed #{ingredient}"

contents = smash ingredient for ingredient in bowl
# => ["Smashed Cheese", "Smashed Tomato"]


double = (x) -> x*2
triple = (x) -> x*3
addOne = (x) -> x+1

addOne triple double 2 # same as addOne(triple(double(2)))


(-> -> -> -> 2 )()()()() # => 2


((x)->
    2 + x(-> 5)
)((y) -> y()+3)
# result: 10