From: Robert Feldt <feldt@...>
Date: 2001-10-16T01:40:50+09:00
Subject: [ruby-talk:22578] Re: Fixnum Arithmetic operations NameError

On Tue, 16 Oct 2001, Robert Linder wrote:

> Here is the problem:
> Fixnum = Fixnum<space>+<no space>Fixnum causes a
> NameError
>
> Fixnum = Fixnum<no space>+<no space>Fixnum  NO ERROR
> Fixnum = Fixnum+Fixnum  NO ERROR
> Same happens on '-','*'. I did not check the rest.
> 
> ==============================================
> irb(main):001:0> xx=0
> 0
> irb(main):002:0> xx = xx + 1
> 1
> irb(main):003:0> xx = xx +1
> NameError: undefined method `xx' for
> #<Object:0xa04a970>
>         from (irb):3
>
Ruby assumes its a method call to method :xx with argument 1. This is in
order to allow 

  your_method arg1

as a substitute for

  your_method(arg1)

Regards,

Robert