From: Phrogz <phrogz@...>
Date: 2010-02-28T23:30:06+09:00
Subject: Re: Speed of uniq

On Feb 28, 7:10 am, Ralph Shnelvar <ral...@dos32.com> wrote:
> (1) How can I tell if a method like uniq is "native" to Ruby.  That is, it's not been added as a C extension and/or is not a Ruby method.

Look in the source code.
http://svn.ruby-lang.org/cgi-bin/viewvc.cgi/trunk/

In this case, look for "rb_ary_uniq".
http://svn.ruby-lang.org/cgi-bin/viewvc.cgi/trunk/array.c?view=markup

(You can search for a phrase from the ri documentation to find the
method.)

> (2) A C++ program is producing YAML from a ragged array.  As I go through each row of the ragged array in the C++ program, I could detect if all items are unique ... or I can do this in Ruby.  I'd prefer to do this in Ruby if the cost is not "too high".

If this is a question, I don't understand it.


> (3) Is there an easy way to find out how uniq is implemented in 1.8 and 1.9?

Look in the source code.
You can find the different branches of Ruby here:
http://svn.ruby-lang.org/cgi-bin/viewvc.cgi/branches/