| Yes thanks I understand. My Foo function used out of bounds fill elements internally to be able to manipulate rectangular arrays of generated indices which are of course ⎕IO dependant. The return result of Foo had removed them. I will not do so and my problem will disappear. thanks again and respect…
Peter
Hi Peter,
no there isn't. Fill items and Fill functions occur all over the
place in APL2.
And they are function specific so that ↑ has other fill items (' '
and 0) than
+ (0) and × (1). On the other hand fill items are not at all
related ⎕IO.
You can easily achieve what you are after like this:
A←4 5
B←3 2⍴42
Z←A↑B
Z
42 42 0 0 0
42 42 0 0 0
42 42 0 0 0
0 0 0 0 0
Z + ∼A↑(⍴B)⍴1
42 42 1 1 1
42 42 1 1 1
42 42 1 1 1
1 1 1 1 1
/// Jürgen
On 08/09/2014 08:15 PM, Peter Teeson wrote:
Is there a nice way to set the fill element for arrays?
Right now it's 0 for numeric and ' ' for character.
Because my function, that is deliberately ⎕IO agnostic, produces an m by n array of different length vectors as a result of using X←(⊂matrix)foo¨matrix. These vectors are certain indices into the original matrix This is precisely what I want.
However in ⊃X each vector is filled with 0 - which, when ⎕IO is also 0, is also a legitimate index. And I don't want that.
I suppose I could set ⎕IO locally but it doesn't appeal to my sense of elegance - although it would be practical! Sigh!
So it would be nice to allow me to set the fill element to something other than the default values.
Comments?
respect….
Peter
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