[#33161] Call/CC and Ruby iterators. — olczyk@... (Thaddeus L Olczyk)

Reading about call/cc in Scheme I get the impression that it is very

11 messages 2002/02/05

[#33242] favicon.ico — Dave Thomas <Dave@...>

19 messages 2002/02/06
[#33256] Re: favicon.ico — Leon Torres <leon@...> 2002/02/06

[#33435] Reg: tiny contest: who's faster? (add_a_gram) — grady@... (Steven Grady)

> My current solution works correctly with various inputs.

17 messages 2002/02/08

[#33500] Ruby Embedded Documentation — William Djaja Tjokroaminata <billtj@...>

Hi,

24 messages 2002/02/10
[#33502] Re: Ruby Embedded Documentation — "Lyle Johnson" <ljohnson@...> 2002/02/10

> Now, I am using Ruby on Linux, and I have downloaded Ruby version

[#33615] Name resolution in Ruby — stern@... (Alan Stern)

I've been struggling to understand how name resolution is supposed to

16 messages 2002/02/11

[#33617] choice of HTML templating system — Paul Brannan <paul@...>

I am not a web developer, nor do I pretend to be one.

23 messages 2002/02/11

[#33619] make first letter lowercase — sebi@... (sebi)

hello,

20 messages 2002/02/11
[#33620] Re: [newbie] make first letter lowercase — Tobias Reif <tobiasreif@...> 2002/02/11

sebi wrote:

[#33624] Re: [newbie] make first letter lowercase — "Jeff 'japhy' Pinyan" <jeffp@...> 2002/02/11

On Feb 11, Tobias Reif said:

[#33632] Re: [newbie] make first letter lowercase — Mathieu Bouchard <matju@...> 2002/02/12

[#33731] simple XML parsing (greedy / non-greedy — Ron Jeffries <ronjeffries@...>

Suppose I had this text

14 messages 2002/02/13

[#33743] qualms about respond_to? idiom — David Alan Black <dblack@...>

Hi --

28 messages 2002/02/13
[#33751] Re: qualms about respond_to? idiom — Dave Thomas <Dave@...> 2002/02/13

David Alan Black <dblack@candle.superlink.net> writes:

[#33754] Re: qualms about respond_to? idiom — David Alan Black <dblack@...> 2002/02/13

Hi --

[#33848] "Powered by Ruby" banner — Yuri Leikind <YuriLeikind@...>

Hello Ruby folks,

78 messages 2002/02/14
[#33909] Re: "Powered by Ruby" banner — Leon Torres <leon@...> 2002/02/14

On Thu, 14 Feb 2002, Yuri Leikind wrote:

[#33916] RE: "Powered by Ruby" banner — "Jack Dempsey" <dempsejn@...> 2002/02/15

A modest submission:

[#33929] Re: "Powered by Ruby" banner — yet another bill smith <bigbill.smith@...> 2002/02/15

Kent Dahl wrote:

[#33932] OT Netscape 4.x? was Re: "Powered by Ruby" banner — Chris Gehlker <gehlker@...> 2002/02/15

On 2/15/02 5:54 AM, "yet another bill smith" <bigbill.smith@verizon.net>

[#33933] RE: OT Netscape 4.x? was Re: "Powered by Ruby" banner — "Jack Dempsey" <dempsejn@...> 2002/02/15

i just don't understand why it didn't show up! dhtml/javascript, ok, but a

[#33937] Re: OT Netscape 4.x? was Re: "Powered by Ruby" banner — Chris Gehlker <gehlker@...> 2002/02/15

On 2/15/02 7:16 AM, "Jack Dempsey" <dempsejn@georgetown.edu> wrote:

[#33989] Re: OT OmniWeb [was: Netscape 4.x?] — Sean Russell <ser@...> 2002/02/16

Chris Gehlker wrote:

[#33991] Re: OT OmniWeb [was: Netscape 4.x?] — Rob Partington <rjp@...> 2002/02/16

In message <3c6e5e01_1@spamkiller.newsgroups.com>,

[#33993] Re: OT OmniWeb [was: Netscape 4.x?] — Thomas Hurst <tom.hurst@...> 2002/02/16

* Rob Partington (rjp@browser.org) wrote:

[#33925] Re: "Powered by Ruby" banner — Martin Maciaszek <mmaciaszek@...> 2002/02/15

In article <3C6CFCCA.5AD5CA67@scnsoft.com>, Yuri Leikind wrote:

[#33956] Re: "Powered by Ruby" banner — Leon Torres <leon@...> 2002/02/15

On Fri, 15 Feb 2002, Martin Maciaszek wrote:

[#33851] Ruby and .NET — Patrik Sundberg <ps@...>

I have been reading a bit about .NET for the last couple of days and must say

53 messages 2002/02/14

[#34024] Compiled companion language for Ruby? — Erik Terpstra <erik@...>

Hmmm, seems that my previous post was in a different thread, I'll try

12 messages 2002/02/16

[#34036] The GUI Returns — "Horacio Lopez" <vruz@...>

Hello all,

33 messages 2002/02/17

[#34162] Epic4/Ruby — Thomas Hurst <tom.hurst@...>

Rejoice, for you no longer have to put up with that evil excuse for a

34 messages 2002/02/18

[#34185] Operator overloading and multiple arguments — ptkwt@...1.aracnet.com (Phil Tomson)

I'm trying to overload the '<=' operator in a class in order to use it for

10 messages 2002/02/18

[#34217] Ruby for web development — beripome@... (Billy)

Hi all,

21 messages 2002/02/19

[#34350] FAQ for comp.lang.ruby — "Hal E. Fulton" <hal9000@...>

RUBY NEWSGROUP FAQ -- Welcome to comp.lang.ruby! (Revised 2001-2-18)

15 messages 2002/02/20

[#34375] Setting the Ruby continued — <jostein.berntsen@...>

Hi,

24 messages 2002/02/20
[#34384] Re: Setting the Ruby continued — Paulo Schreiner <paulo@...> 2002/02/20

Also VERY important:

[#34467] recursive require — Ron Jeffries <ronjeffries@...>

I'm having a really odd thing happen with two files that mutually

18 messages 2002/02/21

[#34503] special characters — Tobias Reif <tobiasreif@...>

Hi all,

13 messages 2002/02/22

[#34517] Windows Installer Ruby 166-0 available — Andrew Hunt <andy@...>

16 messages 2002/02/22

[#34597] rdoc/xml questions — Dave Thomas <Dave@...>

24 messages 2002/02/23

[#34631] Object/Memory Management — "Sean O'Dell" <sean@...>

I'm new to Ruby and the community here (I've been learning Ruby for a grand

44 messages 2002/02/23

[#34682] duplicate method name — Ron Jeffries <ronjeffries@...>

I just found a case in a test file where i had two tests of the same

16 messages 2002/02/24
[#34687] Re: duplicate method name — s@... (Stefan Schmiedl) 2002/02/24

Hi Ron.

[#34791] Style Question — Ron Jeffries <ronjeffries@...>

So I'm building this set theory library. The "only" object is supposed

13 messages 2002/02/25

[#34912] RCR?: parallel to until: as_soon_as — Tobias Reif <tobiasreif@...>

Hi,

18 messages 2002/02/26

[#34972] OT A Question on work styles — Chris Gehlker <gehlker@...>

As a Mac baby I just had to step through ruby in GDB *from the command line*

20 messages 2002/02/28

[#35015] Time Comparison — "Sean O'Dell" <sean@...>

I am using the time object to compare times between two files and I'm

21 messages 2002/02/28

Re: Subclassing vs Subtyping (partly OOP vs FP)

From: Dave Thomas <Dave@...>
Date: 2002-02-04 19:25:05 UTC
List: ruby-talk #33097
Robert Feldt <feldt@ce.chalmers.se> writes:

> I guess there is no easy way out of the problem that you can't  
> semantically check methods unless you describe the semantics in a
> machine-understandable form. The good thing with describing the semantics
> is that we get an oracle that can be used for testing.

I think I was thinking about something less ambitious/. Say you have
out friend BagCollectable that implements bag functionality for some
container. BadCollectable relies on its host class implementing
methods #add, #remove, #includes? and #each, and exports a bunch of
cosmetic methods based on these. We have a set of implementations:

  class BTreeBag
    include BagCollectable
    ...
  end

  class ArrayBag
    include BagCollectable
    ...
  end

  class LinkedListBag
    include BagCollectable
    ...
  end

etc

Then we _could_ arrange it so that BagCollectable did some basic
checking if (say) the -d flag was set:

1. It could check that classes it was mixed in to defined the methods
   it needed.

2. It could generate some basic tests, exercising each class in to
   which it is mixed by calling their #add, #remove, etc methods


Then take it a step further, and break these tests out into a separate
module:

  class BTreeBag
    implements BagProtocol
    includes   BagCollectable

    ...
  end


Regards


Dave

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