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Post #113,416
by tuberculosis
Picture of tuberculosis
8/10/03 9:19:08 PM
8/21/07 12:45:06 PM
Reply
New Mostly
"I know you wanted a Cadillac, but polymorphism dictates that a Chevy Sprint is perfectly substitutable for one."


Sure, unless the client relies on openNorthStarNavigation - then things will go south fast.
Of course, if the client does not rely on that feature, then the substitution is fine.


Smalltalk is dangerous. It is a drug. My advice to you would be don't try it; it could ruin your life. Once you take the time to learn it (to REALLY learn it) you will see that there is nothing out there (yet) to touch it. Of course, like all drugs, how dangerous it is depends on your character. It may be that once you've got to this stage you'll find it difficult (if not impossible) to "go back" to other languages and, if you are forced to, you might become an embittered character constantly muttering ascerbic comments under your breath. Who knows, you may even have to quit the software industry altogether because nothing else lives up to your new expectations.
--AndyBower
Expand Edited by tuberculosis Aug. 21, 2007, 12:45:06 PM EDT
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Post #113,424
by gdaustin
8/11/03 12:03:54 AM
Reply
New Or perhaps that ....
MaxCarCapacity which returns 4 (maybe) for the Sprint and 6 for the Cadillac.

Ask the party of 6 driving 2 hours from Tulsa to Bentonville which object they want...
     Why extends is evil? - (johnu) - (44) - Aug. 4, 2003, 01:01:44 PM EDT
         Is this just for Java? - (drewk) - Aug. 4, 2003, 01:08:47 PM EDT
         This argument is needlessly pedantic, IMO - (FuManChu) - Aug. 4, 2003, 01:19:58 PM EDT
         Lesson learned from Smalltalk - (ChrisR) - (1) - Aug. 4, 2003, 01:22:03 PM EDT
             sounds like a will -NT - (deSitter) - Aug. 4, 2003, 02:43:03 PM EDT
         Inheritance is a tool. - (admin) - (7) - Aug. 4, 2003, 02:30:40 PM EDT
             Re: Inheritance is a tool. - (deSitter) - (3) - Aug. 4, 2003, 02:43:38 PM EDT
                 There's more to life than implementation inheritance. - (admin) - Aug. 4, 2003, 03:24:35 PM EDT
                 Definitions - (johnu) - (1) - Aug. 4, 2003, 03:24:52 PM EDT
                     I'd ask Alan Kay - (tuberculosis) - Aug. 21, 2007, 06:34:14 AM EDT
             Thank you, Scott! - (jb4) - (1) - Aug. 4, 2003, 07:25:50 PM EDT
                 Another Me Too - (JimWeirich) - Aug. 4, 2003, 07:36:37 PM EDT
             Good example of bad inheritance, java.util.Stack - (bluke) - Aug. 5, 2003, 08:14:25 AM EDT
         This guy cracks me up - (tuberculosis) - Aug. 21, 2007, 06:34:08 AM EDT
         IS A vs HAS A - (gdaustin) - (30) - Aug. 4, 2003, 10:30:10 PM EDT
             Quite. - (static) - Aug. 5, 2003, 08:16:32 AM EDT
             I missed that course - (drewk) - (18) - Aug. 5, 2003, 09:29:59 AM EDT
                 Shorthand for relationships - (admin) - (17) - Aug. 5, 2003, 09:36:46 AM EDT
                     Re: Shorthand for relationships - (deSitter) - (1) - Aug. 5, 2003, 09:40:20 AM EDT
                         snicker - (FuManChu) - Aug. 5, 2003, 10:51:07 AM EDT
                     ISA/HASA are good for a first approximation - (JimWeirich) - (14) - Aug. 5, 2003, 10:02:12 AM EDT
                         So what does it get you? - (drewk) - (10) - Aug. 5, 2003, 10:07:20 AM EDT
                             Specialization vs. Generalization - (gdaustin) - Aug. 5, 2003, 10:25:51 AM EDT
                             Code - (JimWeirich) - (7) - Aug. 5, 2003, 10:59:43 AM EDT
                                 Thanks, but what would HASA look like? -NT - (drewk) - (6) - Aug. 5, 2003, 11:22:29 AM EDT
                                     HASA - (gdaustin) - (5) - Aug. 5, 2003, 05:31:03 PM EDT
                                         See, that's where I always get tripped up - (drewk) - (4) - Aug. 5, 2003, 05:53:29 PM EDT
                                             There is a point to naming the useless stuff - (ben_tilly) - (3) - Sept. 21, 2003, 05:36:50 PM EDT
                                                 Clarification - (drewk) - (2) - Sept. 22, 2003, 10:37:14 AM EDT
                                                     Yes - (ben_tilly) - (1) - Sept. 22, 2003, 10:04:26 PM EDT
                                                         That's why I shouldn't be a teacher - (drewk) - Sept. 23, 2003, 10:51:27 AM EDT
                             The example of a stack (see post above) is a good one - (bluke) - Aug. 5, 2003, 11:47:35 AM EDT
                         My car is a Saturn - (gdaustin) - Aug. 5, 2003, 10:31:43 AM EDT
                         hierarchies and the real world - (tablizer) - (1) - Aug. 9, 2003, 02:07:51 PM EDT
                             Nonsense - (ChrisR) - Aug. 9, 2003, 03:51:57 PM EDT
             Not quite that simple - (tuberculosis) - (9) - Aug. 21, 2007, 06:36:01 AM EDT
                 Thing I love/hate about smalltalk - (drewk) - (2) - Aug. 5, 2003, 12:26:10 PM EDT
                     Similar to Python in that fashion -NT - (admin) - Aug. 5, 2003, 12:41:34 PM EDT
                     Its real -NT - (tuberculosis) - Aug. 21, 2007, 06:36:13 AM EDT
                 Forgot to mention: key driver is "substitutability" - (tuberculosis) - (4) - Aug. 21, 2007, 06:36:18 AM EDT
                     Techies at Hertz - (tablizer) - (3) - Aug. 9, 2003, 02:12:31 PM EDT
                         And if your Table or Data Structure is... - (ChrisR) - Aug. 9, 2003, 03:53:19 PM EDT
                         Mostly - (tuberculosis) - (1) - Aug. 21, 2007, 12:45:06 PM EDT
                             Or perhaps that .... - (gdaustin) - Aug. 11, 2003, 12:03:54 AM EDT
                 Code sharing vs. polymorphism - (johnu) - Aug. 5, 2003, 04:42:32 PM EDT

Fusion power might transform the Middle East from an important strategic asset for the Western world into a bunch of strangers killing themselves over disagreements about sand and magic.
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