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.
Some of the best resources for somebody new to APL and programming in general are:
- APL Wiki's simple examples
- The Learn tab on TryAPL
- The book Mastering Dyalog APL by Bernard Legrand
- Learning APL with APLX (also as PDF)
- The Zark APL Tutor
- APL a Day: Introduction, Functions, Arrays, Values, Arrays have Shape
- A Practical Introduction to APL 1 & 2 (3 & 4 is for experts)
- Découvrez le langage APL: parts 1, 2, 3 by Eric Schrafstetter (in French)
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
- APLcart Quiz: Be challenged to write a function for a given task or to explain what a given function does. (Based on APLcart data.)
- 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.
- Previous years' problems from the APL Problem Solving Competition. Phase I problems are available with automated testing.
- 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.
- New primitive functions:
≢Tally, Not Match;
⍸Where, Interval Index;
- Lambdas (dfns): Intro; Details; Operators; The dfns workspace (collection of categorized utilities with extensive comments and notes)
- Tacit programming: Dyalog APL documentation: Intro; Details; short video; long video; APL Cultivation lesson
For advanced APLers
Here is a list of "how-to"s on various subjects:
|APL development |
|Interface||Session ∙ Typing glyphs (on Linux) ∙ Fonts ∙ Text editors|
|Publications||Introductions ∙ Learning resources ∙ Simple examples ∙ Advanced examples ∙ Mnemonics ∙ Standards ∙ A Dictionary of APL ∙ Case studies ∙ Documentation suites ∙ Books ∙ Papers ∙ Videos ∙ Periodicals ∙ Terminology (Chinese, German) ∙ Neural networks ∙ Error trapping with Dyalog APL (in forms)|
|Sharing code||Backwards compatibility ∙ APLcart ∙ APLTree ∙ APL-Cation ∙ Dfns workspace ∙ Tatin ∙ Cider|
|Implementation||Developers (APL2000, Dyalog, GNU APL community, IBM, IPSA, STSC) ∙ Resources ∙ Open-source ∙ Magic function ∙ Performance ∙ APL hardware|