This post has been edited by xclite: 03 October 2012  07:01 AM
Ruby Code Golf 3: Fibonacci Sequence
Page 1 of 17 Replies  12114 Views  Last Post: 16 May 2011  01:34 PM
#1
Ruby Code Golf 3: Fibonacci Sequence
Posted 09 May 2011  12:23 PM
This is a pretty straight forward problem: Create a method that returns the nth value of the Fibonacci sequence in as few characters as possible. Extra points for not repeating work (i.e. for not implementing the naive recursive solution)!
Replies To: Ruby Code Golf 3: Fibonacci Sequence
#2
Re: Ruby Code Golf 3: Fibonacci Sequence
Posted 09 May 2011  02:08 PM
Ok, this is me having never ever used Ruby before. Take this for what it's worth:
That assumes that i is positive, and f(0) = 0, and f(1) = 1. It's the recursive solution, but like I said, first time with Ruby.
def f(i) if(i==0i==1) return i else return f(i1)+f(i2) end end
That assumes that i is positive, and f(0) = 0, and f(1) = 1. It's the recursive solution, but like I said, first time with Ruby.
#3
Re: Ruby Code Golf 3: Fibonacci Sequence
Posted 09 May 2011  03:25 PM
This assumes n is positive.
Spoiler
#4
Re: Ruby Code Golf 3: Fibonacci Sequence
Posted 09 May 2011  03:39 PM
Solving the linear recurrence gives me O(1) time.
Spoiler
#5
Re: Ruby Code Golf 3: Fibonacci Sequence
Posted 09 May 2011  03:53 PM
I guess the question is, which is more important? The efficiency or the pure character count?
#6
Re: Ruby Code Golf 3: Fibonacci Sequence
Posted 10 May 2011  02:32 AM
I never used ruby before. This is the shortest I could come up with (not using recursion):
def f(n) a,b=0,1 n.times{a,b=b,a+b} a end
This post has been edited by Nallo: 10 May 2011  02:43 AM
#7
Re: Ruby Code Golf 3: Fibonacci Sequence
Posted 10 May 2011  05:27 AM
Curtis Rutland, on 09 May 2011  06:53 PM, said:
I guess the question is, which is more important? The efficiency or the pure character count?
Playing with both is fine  I'd probably do two, one that emphasizes each. Also, I meant to uprep you but in my morning failmode I downrepped you so I'm finding two random posts to make up for it.
#8
Re: Ruby Code Golf 3: Fibonacci Sequence
Posted 16 May 2011  01:34 PM
Based on macosxnerd101's solution.
Spoiler
This post has been edited by WaeV: 16 May 2011  01:35 PM
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