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
