From: Erik Boling <schmode93@...>
Date: 2007-07-27T12:30:35+09:00
Subject: Re: Adding arrays

Todd Benson wrote:
> On 7/25/07, Erik Boling <schmode93@yahoo.com> wrote:
>> Great explination, and i did get the irb, thanks a  ton todd :).
> 
> No prob.  If you really are just starting, don't get too frustrated
> with "advanced" methods like zip and inject.  They both are powerful,
> but you can get by without them to start.  For list-type objects
> (Enumerable, Hash, Array, etc.), Ruby provides a swiss army knife of
> methods to slice and dice them.  Get to know your enumerables!  Get
> intimate with the String class, too!
> 
> cheers,
> Todd

humm ok so i tried out my *program* but at the very end i get an error.. 
irb(main):001:0> def ask(question)
irb(main):002:1> puts "#{question}:\n"
irb(main):003:1> gets.split
irb(main):004:1> end
=> nil
irb(main):005:0> Var_1 = ask("Enter 1st Vendors prices")
Enter 1st Vendors prices:
14.50 16.50 14
=> ["14.50", "16.50", "14"]
irb(main):006:0> Var_2 = ask("Enter 2nd vendors prices")
Enter 2nd vendors prices:
13 17.50 14
=> ["13", "17.50", "14"]
irb(main):007:0> Var_1.zip(Var_2)
=> [["14.50", "13"], ["16.50", "17.50"], ["14", "14"]]
irb(main):008:0> Var_1.zip(Var_2).map{ |pair| pair[0] - pair[1] }
NoMethodError: undefined method `-' for "14.50":String
        from (irb):8
        from (irb):8:in `map'
        from (irb):8
        from :0
irb(main):009:0>

could it because im using floats, and not intergers?
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