Introduction

R version 2, or R2, is an APL-like language, partly inspired by A and A+ which are being much discussed at present. Because it uses APL symbols it has the usual font problems (you will need the APL2741 font to run R2).

Currently the session is a bit basic:

A sample R2 session and expressions

This shot shows some of the things R2 does at the moment: scalar extension for arithmetic primitives and direct definition functions. The more standard )ed xx is also supported.

Arrays and Array Literals

The square brackets ([ and ]) in R2 (as in R) delimit an array - e.g. [1 2 3]. In some places you can get away with missing these out (as in 1+1 2 which returns [2 3]), but not always (1 2+3 4, for example, gives 1 [5 6]; to get [4 6] you need to say [1 2]+3 4). Any executable content included in an array literal expression will be run first (like parenthesised expressions).

Translate Tables

R2 uses a Dyalog APL translate table (*.din), which must be called ACDS.din in the same directory as the program. Adrian’s bizarre keyboard is supplied, so have fun! (If this is too stressful for you, you can use the standard one if you remane it appropriately.)

Download

R2.zip, 190KB, Win 95 and higher

Page and site © Richard Smith 2001
Please send any comments to richard@redcorona.com - thank you.