Re: [Bug-apl] Correct Syntax for HTML∆xbox ?

[Juergen Sauermann]

Hi Alex,

in the HTML context, a box is a vector of (enclosed) lines. It is not
a classical 2-dimensional APL value. This is because a vector of enclosed lines
is more appropriate than a 2-dimensional matrix when the line-lengths differ
considerably (like in HTML).

So you may want to try this:

      )COPY 5 HTML

      ⎕←⊃  A←'A1' 'A2' 'A3'   ⍝ "Matrix" with 3 rows and 2 columns
A1
A2
A3

      ⎕←⊃  B←'BB1' 'BB2'    ⍝ "Matrix" with 2 rows and 3 columns
BB1
BB2

      ⎕←⊃   A HTML∆xbox B
A1BB1
A2BB2
A3  

/// Jürgen

On 10/14/2015 01:01 AM, address@hidden wrote:

Hi Bug-APL,

I'm a bit confused. The synopsis states "append text matrices A and B horizontally". The example near the function definition uses slightly different phrasing, and provides an example that does not use exactly "HTML∆xbox":

⍝ append boxes A and B horizontally:

⍝

⍝ AABBB   AA      BBB

⍝ AABBB ← AA xbox BBB

⍝ AA      AA

⍝

When I tried what I thought was the correct usage, I get an error (see below). Can someone demonstrate how to use this function? 

      )COPY /usr/local/lib/apl/wslib5/HTML.apl

      A←3 2 ⍴'A'

      B←2 3 ⍴'B'

      

      A HTML∆xbox B

 

<pre>************************************************

 

*** Assertion (sert 2 ≡ ≡yA) failed at HTML∆xbox[1]

</pre>

≡  yA: 1  ┏→━┓

⍴⍴ yA: 2  ↓AA┃

⍴  yA: 3 2┃AA┃

          ┃AA┃

          ┗━━┛

</pre>

<pre>

 

Stack:

◊[0]        

HTML∆xbox[1]

 

************************************************</pre>