Simple name of a class?

Ruby
1

The name method of class Class returns the full name of a class (e.g.
::). Is there a way to get just the simple
name?

e.g.

module CLI
class Yes

…

end

…

end

What method would return “Yes” (and not “CLI::Yes”) when I have an
instance of the Yes class (e.g. CLI::Yes.new.class.)?

Thanks in advance.

2

On Thu, Jan 13, 2011 at 1:48 AM, Kedar M.
[email protected] wrote:

The name method of class Class returns the full name of a class (e.g.
::). Is there a way to get just the simple
name?

I couldn’t see one defined here:

http://www.ruby-doc.org/core/classes/Module.html#M000474
mod.name → string
Returns the name of the module mod. Returns nil for anonymous modules.

http://www.ruby-doc.org/core/classes/Module.src/M000474.html
/*

  • call-seq:

  • mod.name    -> string

  • Returns the name of the module mod. Returns nil for
    anonymous modules.
    */
    VALUE
    rb_mod_name(VALUE mod)
    {
    VALUE path = classname(mod);

    if (!NIL_P(path)) return rb_str_dup(path);
    return path;
    }

Perhaps something like:

class Module
def path_last_name()
if (i = (r = name).rindex(‘:’)) then r[0…i] = ‘’ end
r
end
end

3

class Module
def relative_name
name.gsub(/^.*::/,’’)
end
end

class Foo; class Bar; end; end

puts Foo.new.class.relative_name
puts Foo::Bar.new.class.relative_name

4

On Thu, Jan 13, 2011 at 6:23 AM, Brian C. [email protected]
wrote:

class Module
def relative_name
name.gsub(/^.*::/,‘’)
end
end

class Foo; class Bar; end; end

puts Foo.new.class.relative_name
puts Foo::Bar.new.class.relative_name

For the fun of it here’s another regexp

irb(main):001:0> %w{foo foo::bar}.map {|s| s[/^(?:.*::)?([^:]+)$/, 1]}
=> [“foo”, “bar”]

:slight_smile:

robert