From: Stefan Lang <perfectly.normal.hacker@...>
Date: 2008-11-15T20:06:50+09:00
Subject: Re: how to call operator as function

2008/11/15 Vladimir Fekete <fekete@melkor.dnp.fmph.uniba.sk>:
> Hi *,
>
>  could you help me please ? I'm trying to write a code where I could have
> operators' functions as values of hash and executing them in way like this
> (formal code):
>
> #=============================
> operators = { "+" => Fixnum.+,
>              "-" => Fixnum.-,
>              "++" => Myclass.++}
>
> op = "+"
>
> result = operators[op](left,right)  if left.class==Fixnum and right.class==Fixnum
> #============================
>
> is it possible ? Thanks,

Use send, if all operators are binary:

  left.send(:+, right)
  left.send(:-, right)

etc.

Stefan