#WIP of a Tiny J implementation in C#. Motivation: I needed J's speed and expressiveness in C# for a webapp Credits: JSoftware, Inc. for releasing the source code and for making excellent documentation available. Heavily influenced by An Implementation of J
Original version can be found in my lang-lab. The initial version did not use generics and then was rewritten to its current form. Generics were chosen when I found I was adding type specific code to every verb.
Status: Proof of concept
Repl - Building / Running (tested on windows/linux)
- run build.bat (windows) or mcs microj.cs primitives.cs repl.cs (mono)
- run bin\microj.exe or microj.exe to get a repl, hit ctrl+c to exit or type exit
Shared Library - Building (tested on windows)
- c:\windows\Microsoft.NET\Framework\v4.0.30319\MSBuild microj.msbuild /p:Configuration=Library
- new Parser().exec("1+1") //tested in linqpad
Command Line Options
- filename
- i to run the repl (with other arguments specified)
- -tp to run parser tests (see tests at bottom of file)
- -t to run the supplied file in test mode
- -q to suppress output on file run
- -js "1+1" to run a string
- -n 10 -js "+/ i. 5" to run an operations N times
Primitive status
Starting with list from http://www.jsoftware.com/jwiki/DevonMcCormick/MinimalBeginningJ
| Primitive | Status | Monad | Dyad |
|---|---|---|---|
| =. | Not Implemented (HOLD) / waiting on local scope | ||
| =: | Implemented | ||
| _ | Implemented | ||
| NB. | Implemented | ||
| $ | Implemented | shape | reshape |
| # | Implemented | tally | copy |
| , | Partially Implemented (missing non-equal shapes) | ravel | append |
| ; | Not Implemented | ||
| {. | Partially Implemented | head | take |
| }. | Partially Implemented | behead | drop |
| / | Implemented | insert | table |
| i. | Partially Implemented | iota | indexof |
| + | Partially Implemented | plus (math) | |
| * | Partially Implemented | times (math) | |
| - | Partially Implemented | subtract (math) | |
| % | Partially Implemented | divide (math) | |
| ^ | Not Implemented | ||
| ^. | Not Implemented | ||
| <. | Implemented | floor | min |
| >. | Implemented | ceiling | max |
Data Types:
- integer (long) -- (consider int32 support)
- float (double)
- string
- bool (partial)
- boxed
Todo:
- More J primitives
Vision:
Not intended to be a replacement for J. It may be useful to hack on to learn J better or embed in C#