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, alexwei...@alexweiner.com 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>