From: "David A. Black" <dblack@...>
Date: 2007-11-15T07:06:47+09:00
Subject: Re: Recursion help.

Hi --

On Thu, 15 Nov 2007, JeremyWoertink@gmail.com wrote:

> I suck at recursion, and I need some help understanding where I'm
> going wrong here.
>
> I have a script that reads a file, then creates an excel form file.
> Here's the program.
>
> puts "Enter file name"
> filename = gets.chomp
>
> puts "Enter carton size"
> carton_size = gets.chomp
>
> out_file = File.new("C:/test/inner workings.xls", "w+")
> out_file.write("Carton number \t Carton quantity \t Card number \n")
>
> file_size = IO.readlines(filename).size
> total_cartons = (file_size.to_f / carton_size.to_f).ceil
> i = 0
> sequence = 1
>
> in_file = File.open(filename)
>
> unless in_file.eof?
>
>  (i..(carton_size.to_i - 1)).each do |number|
>    record = in_file.readline
>    out_file.write("#{sequence}\t#{total_cartons}\t#{record[7, 19]}
> \n")
>  end
>
>  sequence += 1
>  if sequence > total_cartons
>    break
>  end
> end
>
>
> The problem I am running into, is it works fine until the sequence +=
> 1 part.
> the output looks like
> 1 \t 7 \t 1234 1234 1234
> 1 \t 7 \t 1234 1234 1235
>
> then right before
> 2 \t 7 \t 1234 1234 1300
> it says "Done!" and closes.
>
> out_file.close
> puts "Done!"
>
>
>
> I hope this makes sense enough for me to get some help.

Do you want 'until' instead of 'unless'?


David

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