Learning resources: Difference between revisions

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(→‎For old APLers: A little more introduction to a very nice section)
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* [[APL-eusis]]: A game for honing your ability to "think in APL".
* [[APL-eusis]]: A game for honing your ability to "think in APL".


== For old APLers ==
== For APL programmers unfamiliar with current APL ==
In the last decade, several implementations have extended APL:
APL as with other programming languages has been under continual development for many years. Those who learned APL "in the early days" should note that several implementations have made significant extensions to the language and system in the last two decades.


* New primitive functions: <source lang=apl inline>⊢</source> [[Identity|Same]], [[Right_identity|Right]]; <source lang=apl inline>⊣</source> [[Identity|Same]], [[Left_identity|Left]]; <source lang=apl inline>⌷</source> [[Materialise]], [[Squad indexing|Index]]; <source lang=apl inline>≡</source> [[Depth]], [[Match]]; <source lang=apl inline>≢</source> [[Tally]], [[Not Match]]; <source lang=apl inline>⍸</source> [[Where]], [[Interval Index]]; <source lang=apl inline>⊆</source> [[Nest]], [[Partition]]
* New primitive functions: <source lang=apl inline>⊢</source> [[Identity|Same]], [[Right_identity|Right]]; <source lang=apl inline>⊣</source> [[Identity|Same]], [[Left_identity|Left]]; <source lang=apl inline>⌷</source> [[Materialise]], [[Squad indexing|Index]]; <source lang=apl inline>≡</source> [[Depth]], [[Match]]; <source lang=apl inline>≢</source> [[Tally]], [[Not Match]]; <source lang=apl inline>⍸</source> [[Where]], [[Interval Index]]; <source lang=apl inline>⊆</source> [[Nest]], [[Partition]]

Revision as of 20:28, 20 November 2020

"I have long been struck by the contrast between the success with which the adventurous learn APL by simply using it, and the frequent failure of lecture courses to communicate the simplicity and applicability of the language."

Ken Iverson. A Working Introduction to APL, 1981.

To facilitate self-study, the resources here are classified by target audience. However, if you get stuck, don't hesitate to request help in the APL Orchard chat room or ask a question on Stack Exchange.

For non-programmers

Some of the best resources for somebody new to APL and programming in general are:

Follow one or a couple of these tutorials through and play around a bit. To learn APL the advice is similar to that for learning other languages: have a goal (something you want to accomplish) and try to do it. Along the way you are sure to come across the pitfalls and gotchas of the language, and with time you may come to understand what APL thinking means.

For programmers unfamiliar with APL

This is a list of tutorials and other resources of interest to someone who knows about programming or is familiar with another programming language, but wants to learn more about APL.

For novice APLers

If you already have a fair grasp of APL's primitive functions and operators, you can sharpen your skills by challenging yourself with these:

  • APLcart Quiz: Be challenged to write a function for a given task or to explain what a given function does. (Based on APLcart data.)
  • APL Crosswords: 1 4 5 — Fill in expressions and snippets to fulfil all the clues.
  • 2016 Year Game: Find APL expressions involving exactly the digits 2 0 1 6 in that order to equal the numbers 0 to 100.
  • 2017 Code Golf Challenge: Find the shortest possible APL expression that evaluates 1…52 without using any number or character literals.
  • APL-eusis: A game for honing your ability to "think in APL".

For APL programmers unfamiliar with current APL

APL as with other programming languages has been under continual development for many years. Those who learned APL "in the early days" should note that several implementations have made significant extensions to the language and system in the last two decades.

For advanced APLers

Here is a list of "how-to"s on various subjects:


APL development [edit]
Interface SessionTyping glyphs (on Linux) ∙ FontsText editors
Publications IntroductionsLearning resourcesSimple examplesAdvanced examplesMnemonicsStandardsA Dictionary of APLCase studiesDocumentation suitesBooksPapersVideosPeriodicalsTerminology (Chinese, German) ∙ Neural networksError trapping with Dyalog APL (in forms)
Sharing code Backwards compatibilityAPLcartAPLTreeAPL-CationDfns workspaceTatinCider
Implementation Developers (APL2000, Dyalog, GNU APL community, IBM, IPSA, STSC) ∙ ResourcesOpen-sourceMagic functionPerformanceAPL hardware