From: Phrogz <phrogz@...>
Date: 2007-12-20T09:40:07+09:00
Subject: Re: slicing in ruby

On Dec 19, 5:11 pm, Robert Citek <robert.ci...@gmail.com> wrote:
> Discovered this with a brute-force search:
>
> ruby -e 'puts [].methods.sort' |
> while read name ; do
>    echo == $name
>    ri Array."${name}" | cat
> done
>
> Interestingly, a lot of methods didn't return anything via ri.  For example:
>
> $ ri Array.methods
> Nothing known about Array.methods

C:\Documents and Settings\gavin.kistner>qri methods
------------------------------------------------------ Multiple
choices:

     Kernel#methods, Object#methods

C:\Documents and Settings\gavin.kistner>qri Object.methods
---------------------------------------------------------
Object#methods
     obj.methods    => array
------------------------------------------------------------------------
     Returns a list of the names of methods publicly accessible in
     _obj_. This will include all the methods accessible in _obj_'s
     ancestors.

        class Klass
          def kMethod()
          end
        end
        k = Klass.new
        k.methods[0..9]    #=> ["kMethod", "freeze", "nil?", "is_a?",
                                "class", "instance_variable_set",
                                 "methods", "extend", "<em>send</em>",
"instance_eval"]
        k.methods.length   #=> 42


But yes - documentation helps you find out what methods are available.
^_^

http://phrogz.net/ProgrammingRuby/builtins.html#builtinclassesandmethods
http://phrogz.net/ProgrammingRuby/lib_standard.html#standardlibrary
http://www.ruby-doc.org/