From: Stefan Schmiedl <s@...>
Date: 2001-12-11T17:27:50+09:00
Subject: [ruby-talk:28186] Re: The benefits of dynamic typing?

Alexander Schofield (2001-12-11 16:17):

> Harry Ohlsen wrote:
> > 
> > In article <20011211.105127.461152493.1860@zip.com.au>, "Harry Ohlsen"
> > <harryo@zip.com.au> wrote:
> 
> > Actually, this makes me wonder ... is there a method somewhere that lets me find out whether a given object's class is a descendent of a given class?  If not, one could definitely write such a thing, by running up the superclass hierarchy.
> 
> Do you mean Object#kind_of?
> 
> irb(main):017:0> 2.kind_of? Numeric
> true
> irb(main):018:0> 2.kind_of? Integer
> true
> irb(main):019:0> 2.kind_of? Fixnum
> true

and you can try ancestors ... which is nice
for getting to know ruby's class tree.

irb(main):002:0> Fixnum.ancestors
[Fixnum, Integer, Precision, Numeric, Comparable, Object, Kernel]

s.
-- 
Stefan Schmiedl
EDV-Beratung, Programmierung, Schulung
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Tel. (0 94 21) 74 01 06
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shhhh ... I can't hear my code!