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Re: [Bug-apl] Feature suggestion: multiple function arguments

From: Elias Mårtenson
Subject: Re: [Bug-apl] Feature suggestion: multiple function arguments
Date: Sat, 5 Mar 2016 23:33:30 +0800

On 5 March 2016 at 23:28, Louis de Forcrand <address@hidden> wrote:
That would be a great idea. However, it would indeed take not only quite a bit of
time to set up, but would also need constant checking to make sure the updates
in the main branch don’t conflict with additions.
While I just said that I believe the main branch should probably concentrate on
the standard, one of the things I’ve really fallen in love with in J and that is
completely missing in standard APL is tacit definition. Not only does it allow
inversible functions and idiom detection for optimisation, but it is just simply
so elegant:
mean ← +⌿ ÷ ≢

This is where we disagree, but nothing wrong with that. I can certainly understand why someone would like that construct, but I just don't like it at all. I think this is probably the least clear and easily the most confusing language construct I know of in any language I have tried.

I would certainly like to see some simpler way to define such functions without multiple levels of lambda definitions, but the J model is not the right way, in my opinion.


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