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See more here: http://www.aplusdev.org/APlusRefV2_14.html#HEADING282

Currently only two lexers are implemented in the system: APL and ASCII. The 
original A+ describes a third UNI lexer. (For more info see the docs)

TODO:
* Implement the lexer
* Make the lexer available in the system ($mode/command args)
* Add at least one testcase for each UNI lexer symbol

See more here: http://www.aplusdev.org/APlusRefV2_14.html#HEADING299

Example:

_issf{(`a;<5)}

Result:

1

Inside the monadic Disclose function's code there is a 'ConvertToFloat' method. 
Move the method from here, make it an extension method and check if this logic 
is used elsewhere.

See more here: http://www.aplusdev.org/APlusRefV2_14.html#HEADING286

Exmaple:

_flat{(iota 3; < 2 3; 1 2 rho 6)}

Result:

0 1 2 2 3 6 6

This issue was created by revision r105.


Add some logic for switching ToDot generation on/off. System command, console 
argument or something similar.

Currently the Matrix inverse monadic function is not available in the engine. 
Thus the task is to implement it.

Tasks:
 - Add symbol to APL and ASCII lexer.
 - Add token to the parser.
 - Add reference to the method in the MethodChooser.
 - Implement method.

Replace all fails on scalar with rank error.

Example:
 s := 43
 s[]:=3
//[error]: Rank

but it should not fail. Additional

 s[]:='d' 

should fail with type error.

See more here: http://www.aplusdev.org/APlusRefV2_14.html#HEADING313

Example:

_index{2 4 1;(`s1;`s2;`s3);<`n.a}

Result:

<  `s3
<  `n.a
<  `s2

Refactor 'dot' output generation to a separate class or classes. Currently it 
is inside of all AST.Nodes, the method name is 'ToDot'.

See more here: http://www.aplusdev.org/APlusRefV2_14.html#106

Example:

Inventory :=    (("Oxford"; "Oxford";"Loafer";"Loafer");
         ("Brown";  "Tan";   "Black"; "Brown");
         (128.98;   175.98;  112.50;  112.50))


index := Inventory[0 1] _index_of (<"Oxford";<"Tan")

index pick 2 pick Inventory

Result:

175.98

Solve dyadic function is also missing from the engine. Implementation is 
required.

Tasks:
 - Add symbol to APL and ASCII lexer. (related to issue 3)
 - Add token to the parser. (related to issue 3)
 - Add reference to the method in the MethodChooser.
 - Implement method.

This issue was created by revision r103.


Matrix inverse is mostly implemented in issue 4, but the pseudoinverse case is 
missing.

Here: http://www.aplusdev.org/APlusRefV2_14.html#HEADING275

Example:

_alsf{(`test;5)}

Correct the nested vectors/arrays displayer algorithm.

Example: (;(2;iota 2 3;(67; `s);9 8))

Result in A+:

<
< <  2
  <  0 1 2
     3 4 5
  < <  67
    <  `s
  <  9 8

Bad result in A+.NET:

<
< < 2
< 0 1 2
3 4 5

< < 67
< `s
< 9 8

This issue was created by revision r101.


Currently _alsf system function fails on symbol vector input.

Example:
 _alsf{`a `b `c `d}

Should result:
 <  `a `c
 < <  `b
   <  `d