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Questions tagged [apl]

This challenge is related to the APL language. Note that challenges that require the answers to be in a specific language are generally discouraged.

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17
votes
4answers
1k views

What have we got?

Inspired by, and in memory of, our beloved genius, R.I.P. He invented and implemented dfns — his magnum opus and the subject of the challenge. For the interested: latest full dfns documentation and ...
14
votes
5answers
294 views

Conjugation in Real Life

In @Adám's Dyalog APL Extended, the (under) operator means conjugation: apply one function, then a second function, then the inverse of the first. It's fun to ...
9
votes
1answer
284 views

Dyadic Transpose

As with most APL symbols, has different meanings when called with one argument (transpose) versus two arguments (dyadic transpose / reorder dimensions). This ...
19
votes
4answers
859 views

Clearly parenthesize APL trains

In APL, you can write tacit functions, called trains. How they work is irrelevant for this challenge. Here are the different ways they can be grouped, using as ...
8
votes
7answers
475 views

Fill the steps (randomly)!

This is Hole-9 from The Autumn Tournament of APL CodeGolf. I am the original author of the problem there, and thus allowed to re-post it here. Given a simple (rectangular, non-jagged) Boolean array (...
13
votes
17answers
1k views

Ten-row bar chart

This is Hole-1 from The Autumn Tournament of APL CodeGolf. I am the original author of the problem there, and thus allowed to re-post it here. Given a list of numbers, produce a horizontal bar chart ...
21
votes
7answers
2k views

Take that frown and turn it around

A celebration of the many faces of APL Given a string among those in column 1 or column 2 of the below table, return the string's neighbor to its right. In other words, if given a string in column 1 ...
26
votes
11answers
2k views

Official Dyalog APL 2016 Year Game

If you think this could be fun, but too much work, consider participating in this much smaller challenge. A bit of fun (and possibly frustration!) for 2016... Dyalog's "puzzle of the year". Enjoy! ...
28
votes
9answers
2k views

Tips for golfing in APL

I started one code golf challenge recently and it seems like the winner is GolfScript (surprise, surprise!). What's interesting is that there was another very strong competitor that had all chances to ...