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

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.

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

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

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

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

Example:

_issf{(`a;<5)}

Result:

1

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)}

This issue was created by revision r105.


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

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.

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.

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

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.

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

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

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