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Re: [Bug-apl] Power Operator
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From: |
Kacper Gutowski |
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Subject: |
Re: [Bug-apl] Power Operator |
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Date: |
Wed, 13 Aug 2014 18:40:27 +0200 |
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User-agent: |
Mutt/1.5.23 (2014-03-12) |
That's interesting thing to see in GNU APL.
Negative exponents are obviously tricky to do, but what about using
boolean functions? It's a quite convenient way to succinctly express
iteration. But right now GNU APL gives somewhat unexpected results:
({2+⍵÷2}⍣≡) 9
9
({2+⍵÷2}⍣=) 9
VALENCE ERROR
(λ1⍣=)9
^ ^
In both cases Dyalog's answer would be 4, i.e. a fixed point of {2+⍵÷2}.
-k