:Section :EndSection in a :For loop

[ray]

I cant see why one cannot put a

Code: Select all

:Section .... :EndSection

within a

Code: Select all

:For....:EndFor

loop.

EG

Code: Select all

      ∇Foo∇
     ∇ Foo;i
[1]
[2]    :For i :In 1 2
[3]
[4]       ⍝ :Section
[5]        i
[6]       ⍝ :EndSection
[7]
[8]    :EndFor
     ∇
      Foo
1
2
       ∇Foo∇
     ∇ Foo;i
[1]
[2]    :For i :In 1 2
[3]
[4]        :Section
[5]            i
[6]        :EndSection
[7]
[8]    :EndFor
     ∇
       Foo
SYNTAX ERROR
Foo[2] :For i :In 1 2
                  ∧


Is there a reason for this behavior, or is it a bug?

[petermsiegel]

On the Mac's most current version, it seems to work...
Perhaps it's a premium feature.

Code: Select all

     ∇Foo[⎕]∇
[0]   Foo;i
[1]   :For i :In 1 2
[2]        :Section
[3]         i
[4]        :EndSection
[5]   :EndFor
Foo     
1
2

[AndyS|Dyalog]

Which version of Dyalog APL are you using Ray ?

The behaviour seems to have changed between 17.0 and 17.1 - you cannot put a :section in a :for loop in 17.0, but you can in 17.1 and later.

The Dyalog interpreter is the same for all users, and is built on all platforms from the same source. We may occasionally add an I-beam for a customer, either as a feature enhancement, or to aid debugging, but most of those usually end up as standard features in future versions. So no, no premium features at play here !

[ray]

Thanks Andy, I'm still using version 17.0, so I am now happy.

Seasons Greeting to you all.

[ray]

P.S.

:Section is now working fine for me in a :for loop under Dyalog 18.0.

Many thanks, and a Happy New Year