From: "Paul D. Kraus" <paul.kraus@...>
Date: 2006-06-06T05:12:32+09:00
Subject: Re: Object Troubles - undefined method `+'

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never mind re-read some more and figured it out.

On 6/5/06, Paul D. Kraus <paul.kraus@gmail.com> wrote:
>
> I am parsing a text file that is 3 fields per line deliminted by pipes '|'
> Each line contains a customer code, shipmethod, and customer name.
> Each line represents an invoice that was cut.
>
> I need to count all invoices and then count all invoices that went out
> next
> day air saver.
> From working with the pick axe it seems to me that you have a class with
> two
> attributes invoice, and nda invoice.
> You then store your objects in a hash for easy lookup.
>
> When i run the below program I get this error...
> ./parse.rb:14:in `incndainvoice': undefined method `+' for nil:NilClass
> (NoMethodError)
>         from ./parse.rb:31
>         from ./parse.rb:20
>
> TIA,
> Paul
>
> Here is my class and program ...
>
> #!/usr/bin/env ruby
>
> class Customer
>     attr_reader :invoices, :ndainvoices
>     attr_writer :invoices, :ndainvoices
>     def initialize
>         @invoices = 1
>         @ndainvoices = 0
>     end
>     def increment_invoice
>         invoices = invoices + 1
>     end
>     def increment_ndainvoice
>         ndainvoice = ndainvoice + 1
>     end
> end
>
> customers = Hash.new
>
> open('NdaInvoiceCount.txt','r').each_line do |line|
>         (customer_code, ship_method, customer_name) = line.chomp.split
> ('|')
>         if customers[ customer_code ]
>             customers[ customer_code ].increment_invoice
>         else
>             customers[ customer_code ] = Customer.new
>         end
>         customers[ customer_code ].increment_ndainvoice if ship_method ==
> 'SAVGRD'
> end
>
>
> here is some sample data....
> 0000016324|SAVGRD|Dupage Prosthetics
> 0000038955|SAVGRD|TRUDELL ORTH & PROS SERVICES
> 0000019155|UPS   |Scott Orthotic Labs
> 0000061674|UPS   |COMPREHENSIVE BRACE & LIMB CTR LLC
> 0000008593|U02G  |Huron Valley Assoc
> 0000039954|SAVGRD|Island Coast Orthopedics
> 0000028719|UPS   |Paul Richelson's Feet First
> 0000003455|FEDGND|CLARK ORTH
> 0000019297|UPS   |J. Slawner LTD.
> 0000061508|UPS   |LEVY & RAPPEL
>
>

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