|Subject:||Re: [Bug-apl] A couple of bugs, and a question on the power operator|
|Date:||Mon, 15 Aug 2016 13:30:10 +0200|
|User-agent:||Mozilla/5.0 (X11; Linux i686; rv:31.0) Gecko/20100101 Thunderbird/31.4.0|
I see. Maybe I misunderstood Louis,s email from last Saturday completely?
The way I read this email was that in Dyalog APL version 15 you can have
a monadic condition function G in F⍣G . Quote from the email:
The Dyalog 15.0 manual states that the power operator can take a
function right argument. In this case, that function can be
either monadic or dyadic, and can be a lambda.
If it’s monadic:
(F⍣G) ⍵ ←→ ⍵ ← F ⍵ until G ⍵
⍺ (F⍣G) ⍵ ←→ ⍵ ← ⍺ F ⍵ until G ⍵
If it’s dyadic:
(F⍣G) ⍵ ←→ ⍵ ← F ⍵ until ( F ⍵) G ⍵
⍺ (F⍣G) ⍵ ←→ ⍵ ← ⍺ F ⍵ until (⍺ F ⍵) G ⍵
(Note that G is checked before the first time F is executed.)
I don't know if that statement is correct or not, but if it is then I would prefer to not
introduce this "monadic case" in GNU APL for the reasons explained earlier.
On 08/15/2016 10:16 AM, Jay Foad wrote:
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