From: James Edward Gray II <james@...>
Date: 2007-01-19T22:16:49+09:00
Subject: Fwd: Please Forward: Ruby Quiz Submission

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Begin forwarded message:

> From: "Nicolas Modrzyk" <hellonico@gmail.com>
> Date: January 19, 2007 1:12:26 AM CST
> To: submission@rubyquiz.com
> Subject: Please Forward: Ruby Quiz Submission
>
> Hi there,
>
> This was my first quiz, and it took me more than an hour to solve  
> it (><)
> But it was really fun so decided to send it over.
>
> This is a submission for the number spiral, quiz 109
>
> Can't wait for the next one ...
>
> Niko,
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## Nicolas Modrzyk: hellonico at gmail.com
# January 19, 2007
# 

def spiral(n)
    # handle case for 0
    puts 0 if n==0
    
    1.upto(n) {
        |row|
        spiral_line(n, row)    
    }
    
end

def spiral_line(n, row)
    line = Array.new
    1.upto(n) {
        |col|
        line[col]="\t"+spiral_row_col(n, row, col).to_s 
    }
    puts line.to_s
end

def spiral_row_col(n, row, col) 
    return 0 if(n==0) 
    
    if(n%2==0 and row==1)
        return n*(n-1) + (col-1)
    end 
    
    if(n%2==0 and col==1)
        return n*(n-1) - (row-1)
    end
    
    if(n%2==1 and row==n)
        return (n*n) - (col)             
    end
    
    if(n%2==1 and col==n)
        return n*(n-1) - (n-row)
    end
    
    return spiral_row_col(n-1, row, col) if n%2==1
    return spiral_row_col(n-1, row-1, col-1) if n%2==0
    
end


spiral(8)
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