GNU APL: Difference between revisions
Clarified Dyalog APL extensions over APL2/GNU APL.
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(Clarified Dyalog APL extensions over APL2/GNU APL.) |
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{{implementation|APL}}
[https://www.gnu.org/software/apl/ GNU APL] is a cross platform APL (APL2) interpreter.
The APL interpreter has implemented:
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- a shared variable interface
Extensions to the APL2 standard include:
- scripting
- SQL interface
- structured variables and associative arrays
- a GTK3 interface for plotting and even building full UI applications in APL.
In general, it follows IBM's APL2 implementation. For a wonderful introduction to APL2, refer to [https://archive.org/details/apl-2-at-a-glance-brown-pakin-polivka APL2 At A Glance], by Brown, Pakin & Polivka.
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Those who are studying APL would do well to contrast GNU APL with [https://rosettacode.org/wiki/Dyalog_APL Dyalog APL], a proprietary implementation that is actively developed by its namesake company, which has diverged from APL2 in some respects. Many examples nowadays which are found online use Dyalog operators and syntax extensions; to understand the differences refer to this discussion of APL "evolution" or "migration" levels and how they affect the meaning of certain operators: [https://groups.google.com/g/comp.lang.apl/c/QNPOntjvIHM Mix (up arrow) in GNU APL?]
The most important difference between APL2 and Dyalog APL is that Dyalog
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