Multi-def docs?

ruby-talk
1

I thought Ruby allows you to define similar functions in parallel by putting the parts that differ together in square brackets. Is there some online documentation for that? I haven't been able to find it yet.

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Yet another Dan

2

YAD wrote:

I thought Ruby allows you to define similar functions in parallel by
putting the parts that differ together in square brackets. Is there
some online documentation for that? I haven't been able to find it yet.

If you mean something like this:

some_method(arg1, arg2[, arg3[, arg4]]) => nil

It is just a documentation convention to indicate
optional arguments. In RDoc files this only appears
in methods defined in C because the call sequence
is entered manually in the doc rather than being
extracted from the code itself like with pure-Ruby.

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Posted via http://www.ruby-forum.com/\.

3

YAD wrote:

I thought Ruby allows you to define similar functions in parallel by putting the parts that differ together in square brackets. Is there some online documentation for that? I haven't been able to find it yet.

I have never heard of such a feature. This is certainly not in the core language. Maybe some extension or framework? How do you think does the syntax look like?

Kind regards

  robert

4

YAD wrote:

I thought Ruby allows you to define similar functions in parallel by
putting the parts that differ together in square brackets. Is there
some online documentation for that? I haven't been able to find it yet.

What follows is only approximately like what you are describing. Maybe it
will give you some ideas:

#!/usr/bin/ruby

class Demo
   def initialize
      @op_hash = {
         "+" => Proc.new { |y,x| y + x },
         "-" => Proc.new { |y,x| y - x },
         "*" => Proc.new { |y,x| y * x },
         "/" => Proc.new { |y,x| y / x }
      }
   end

   def perform(y,x,m)
      @op_hash[m].call(y,x)
   end
end

demo = Demo.new

puts demo.perform(1.0,3.0,"/")

Output: 0.333333333333333

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Paul Lutus
http://www.arachnoid.com

5

Robert Klemme wrote:

I have never heard of such a feature.

Sorry. Must be another language.

Eero Saynatkari wrote:
> If you mean something like this:
> some_method(arg1, arg2[, arg3[, arg4]]) => nil
> It is just a documentation convention to indicate
> optional arguments.

No, it's something else.

Thanks for the help.

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Yet another Dan