Fibonacci Function in Coffeescript

/* the function */
fib = (x) ->
    if x < 2
        x
    else
        fib(x-1) + fib(x-2)

/* test it out */
solutions = []
for number in [0..10]
    solutions.push ( fib number )
    
console.log solutions

It's a good function, but there's an issue with it. It will not like doing numbers above 40 since it is recursive.
I would suggest using a Loop instead.

Note that comments in CoffeeScript are # comment not /* comment */ nor // comment.
Here is a more iterative and concise version:

f = (l) ->
  p = 0
  n = 1
  [0].concat (p for i in [1..l] when [p, n] = [n, p + n])
console.log f 10 # (11) [0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55]