From: sto.mar@...
Date: 2012-08-18T03:02:16+09:00
Subject: Re: Default parameters? + (Noob) Guidance

Am 17.08.2012 19:37, schrieb incag neato:
>> Default arguments are declared with an assignment like this
>>
>> def say_hello(name = "nobody")
>>    "Hello, #{name}."
>> end
>
>
> Thanks so much Robert! Gotcha. The issue I'm confused with is accounting
> for both:- setting the default value (for when no parameter is passed)
> and also accepting an input.
>
> I.e. -->
>
> returns "Hello, Master." when say_hello("Master") is called ✔
>       Error: returns "Hello, Qui-Gon Jinn."
>       when say_hello is called with no parameters
>            Error: wrong number of arguments (0 for 1)
>
> Do I use something like a conditional? Something more like the below?
>
> def say_hello(name)
>       if say_hello?
>           "Hello, #{name}."
>       else
>           "Hello, Qui-Gon Jinn."
>       end
> end

No, that does not work. Did you try it?

> Not sure which approach to take.

Robert already gave you the solution to your problem:
"default arguments are declared with an assignment like this"

1.9.3-p194 :001 > def say_hello(name = "nobody")
1.9.3-p194 :002?>   "Hello, #{name}."
1.9.3-p194 :003?> end
  => nil
1.9.3-p194 :004 > say_hello
  => "Hello, nobody."
1.9.3-p194 :005 > say_hello('Master')
  => "Hello, Master."


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