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Re: [Bug-apl] Element types in mixed arrays


From: Elias Mårtenson
Subject: Re: [Bug-apl] Element types in mixed arrays
Date: Sat, 24 May 2014 00:26:24 +0800

Well, it's not exactly what you're looking for. Consider if an element is a nested array. It'll come out as 0.

Regards,
Elias


On 23 May 2014 23:54, Blake McBride <address@hidden> wrote:
Greetings, and sorry about the basic question.

If I have a mixed array, i.e.:

m←5 5⍴⍳25
m[2;2]←'X'

What I am looking for is the correct way to tell which elements are character and which are numeric.

I know I can do:

m∊⎕AV

That gives me exactly what I am looking for.  It just seems like a lot of work for each element of m to get compared with each element of ⎕AV.  DialogAPL defines monadic ∊ to give this, but IBM APL2 uses it for something else.  I just thought there might be an efficient idiom for this in IBM APL2.

Thanks.

Blake



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