From: misterparker@...
Date: 2008-07-16T22:35:20+09:00
Subject: Re: check my class

On Jul 16, 2:23 am, Frederick Cheung <frederick.che...@gmail.com>
wrote:
>
> Because your file probably used tabs (the convention usually to use
> soft tabs instead, 2 spaces per tab).
> In an interactive session with irb tab means auto complete so pasting
> a document with tabs in it won't end well.
> Don't know if you can set textedit to use spaces instead of tabs.
>
> Fred
>
Perfect fix. thanks

Here's the my first functioning class.

class Item
attr_reader :cash, :salesTaxPayable, :salesCount, :sales
  def initialize(item,price,cost)
    @item, @price, @cost = [item, price, cost]
    @sales = @salesCount = @cash = @salesTaxPayable = 0
    @tax = 0.06
    @unCoveredCost = cost
  end
    def sale(discount_price = false, qty = 1)
        if discount_price == false then
          @salesTaxPayable += ((@price*qty) * @tax)
          @sales += (@price - ((@price*qty)*@tax))
          @cash += @price*qty
          @unCoveredCost -= ((@price*qty) - ((@price*qty)*@tax))
        else
          @salesTaxPayable += (@price*@tax)
          @sales = @sales + ((discount_price*qty) -
((discount_price*qty)*@tax))
          @cash = @cash + (discount_price*qty)
          @remainingCost = @unCoveredCost - ((discount_price*qty) -
((discount_price*qty)*@tax))
        end
        @salesCount += 1
    end
end

(changed all the tabs to spaces)

Hurray. And it worked for what i needed. temporary cash register haha
Tell me what you think about making a variable for the repeated
calculations...Michael said it was better to just do the calcs as they
are needed? so i did. i'm trying to learn the "ruby way" of making
things simpler and more elegant