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0 pointsnickik12y ago0 comments

Two points

1. > But, that doesn't mean that modelling hierarchies is not necessary in some domains.

Agree but the addition of full OOP seams overkill to reach this goal. Look at this clojure code:

>(derive ::rect ::shape) >(derive ::square ::rect) > (parents ::rect) -> #{:user/shape} (ancestors ::square) -> #{:user/rect :user/shape} (descendants ::shape) -> #{:user/rect :user/square}

Clojure gives you hierarchy 'À la carte'. This means that you know longer tie the two things together, it easy in clojure for example to have many diffrent hierarchy that are independent but still dont get in each others way. Modeling the same with objects is hard. Just a example, for often good reasons multiple inheritance is not allowed in most languages, however if you use hierarchy as a domain model and not as programming model you generally want it.

I agree with the articles point, people should not invent there own langauges for everything, however that is a terrible reason to discard the language for 'large scale' production use. Every language has features that generally should be avoided, every language make it easy to do the wrong thing. Macros are relatively easy to understand, compared some other language features I could name. Also the effect of macros is generally local, unlike say monkey patching.

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3 comments · 1 top-level

Ygg212y ago· 2 in thread

> however that is a terrible reason to discard the language for 'large scale' production use

I think article by `large scale` means something that needs lots of people working on it. I can see how several programming departments might form their own lisp-tribes that can't speak to each other because they disagree over tiny details (or engaged in power play).

nickikOP12y ago

The same thing can happen in any language and with any detail. Power play normally is political not really about language.

Also one could easly argue that macros help with this situation because the 'right way' can be encoded in a macro and then you can require everybody to use it. That seams a better solution then long documents that explain in detail how X is done (because the langauge can reduce the code dublication). I remember such things in my (short) C++ experiance.

Ygg212y ago

Or just use a language that has one way of doing things? C++ with it's pre-compiler magic, and several (three or four ) ways to define a variable is a rather bad example.

Things like this are bumps on a road, where your organization is a car with bad suspension. Sure, bad suspension will cause problems down the road, but no reason to drive your car through rocky terrain.

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