Dyalog APL v14.0 Tech Preview

[Morten|Dyalog]

We are in the final stages of the design of a number of new language features, and would like to invite interested parties to install and test the “v14.0 Tech Preview” – or download and review the Release Notes (if you have viewed an older copy of this document, you may need to hit "refresh" in your browser to update it). Some of the features may be controversial, so we welcome your feedback – whether you are a user of Dyalog APL or not. The key features that we hope to validate through the release of the preview include:

New primitive operator rank (identical to the SHARP APL implementation and the ISO/IEC 13751 Extended APL Standard)
New primitive operator key (similar to the J definition)
New primitive function tally (identical to the J definition)
Function trains (similar to trains of length 3 in J)
An extension to dyadic index of (iota), to work on higher-rank arrays (for example, to search for rows of a matrix)
An extension to mix with axis, providing greater compatibility with IBM APL2
New user commands to control boxed / truncated session output
Experimental changes to the binding of function definitions

You can find the full invitation to participate in the review of the "Tech Preview" on the Dyalog CTO Blog.