From: Justin Collins <collinsj@...>
Date: 2006-05-16T09:22:09+09:00
Subject: Re: stack level too deep (SystemStackError)

john s wrote:
> When writing a code to find the factor of a given number, i ran into the 
> following error message:
>
> "factor.rb:48: parse error, unexpected kEND, expecting $"
>
>
> I was hoping someone could shed light on the problem. Heres the code:
>
> def isprime testNum
> 		testWith = 2
> 		run = 1
> 		while testNum > testWith and run == 1
> 			prime = testNum % testWith
> 			if prime != 0
> 				testWith = testWith + 1
> 			else
> 				run = 2
> 			end
> 	   end
>
> 	if prime != 0
> 		return true
> 	else
> 		return false
> 	end
> end
>
>
> def factor toFactor
> 	factored = false
> 	numbers = Array.new
> 	numbers.push toFactor
> 	testWith = 2
> 	while factored == false	and numbers.last > testWith
> 		test = numbers.last
> 		isFactor = numbers.last%testWith
> 		if isFactor == 0
> 			numbers.pop
> 			numbers.push(testWith)
> 			numbers.push(test/testWith)
> 			factored = true
> 		else
> 			testWith = testWith + 1
> 		end
> 	end
>
> 	eval = numbers.last
> 		if isprime(eval) == false
> 			numbers.pop
> 			add = factor(eval)
> 			numbers.push(add)
> 		end
> 	end
>
> 	numbers
> end
>
>
> f = factor(100)
>
>
> puts f.join(' x ')
> _____________________________________________________________________
> Note: subsituting " eval = numbers.last" for "numbers.each do |eval| 
> "avoids the error.
>
> Please Help!
>
>   

I don't think Array#last takes a block.

-Justin