Playing with Fibonacci in CoffeeScript and Ruby They are both kind of silly but I think I like the CoffeeScript version better.

gistfile1.rb

#CoffeScript
fib = (n, i=0, j=1) -> i=j+j=i for _ in [1..n]
fib(7)
=> [1, 1, 2, 3, 5, 8, 13]

#Ruby
fib = ->(n, i=0, j=1){(1..n).map{i=j+j=i}}
fib[7]
=> [1, 1, 2, 3, 5, 8, 13]