Language of the Month for December 2021: BQN

Question

In accordance with our meta agreement, since one candidate received more votes than the others, we have a new featured language! Throughout December 2021, our Language of the Month will be:

BQN

What's a Language of the Month?

See the meta post for nominations. In short, during December, those who wish to participate should learn (at least the basics of) BQN, and use it to solve challenges. Participation is completely optional, but is anticipated to be fun!

Information about BQN

^{Taken from the nomination post}

BQN is a powerful modern language based on the ideas of Ken Iverson's APL, which is already quite popular on CGCC.

The main aim of BQN is to remove irregular and burdensome aspects of the APL tradition while adding newer modern concepts to the mix. This makes BQN oftentimes more practical than APL, and gives it a much more consistent, streamlined design refined from many years of array programming experience.

Why BQN?

• BQN uses cool looking(important), carefully chosen symbols. This makes it readable and practical, yet very golfy.
• BQN provides strong fundamentals for array programming which you can use for algorithmic coding in any language.
• Lisp style functional programming support which is outlined here.
• BQN has the most powerful tacit system available in an APL family language.
• Why BQN? is a more comprehensive document on what BQN is currently and what it aims to be.

Resources

• The APL Orchard (SE chatroom)
• online interpreter
• C implementation
• Java implementation
• APL Farm Matrix and Discord chatrooms
• BQNcrate, a collection of short snippets for common tasks
• Tips question

Answer 1

List of all BQN answers posted in December 2021

• AoCG2021 Day 1: Automated delivery frenzy by Razetime

• AoCG2021 Day 2: Naughty or nice? by Razetime

• AoCG2021 Day 3: Say-Look-Say by Razetime

• Create an ASCII line, given a length by PyGamer0

• Print a Tabula Recta! by SjoerdPennings

• Bernardino identifies unaltered dollar words by DLosc

• Output programming language name by SjoerdPennings

• Swap every two elements in a list by ovs

• AoCG2021 Day 10: Memory reallocation routine by ovs

• AoCG2021 Day 9: Spiral memory stress test by Razetime

• AoCG2021 Day 11: Garbageful streams by Razetime

• Chunk Sort a Sequence by DLosc

• Alphabet Staircase by DLosc

• Return all letter counts as an integer by ovs

• Implement Minceraft by SjoerdPennings

• Generate the Chess Numbers™ by DLosc

• Helloellolloloo Worldorldrldldd by DLosc

• Greatest Common Divisor by ovs

• Pascal's Triangle as a 2-dimensional list by DLosc

• AoCG2021 Day 18: Stripping Strips by ovs

• Check if the string is reshaped by Razetime

• Nesting list with value n amount of times by DLosc

• Bubbler and 3 others are typing․․․ by DLosc

• Convert the decimal digits of a string's Unicode codepoints to binary, reinterpret as decimal, and take the sum by Razetime

• When does Santa enter the basement? (AOC Day 1) by DLosc

• Swap Two Values in a List by Dominic van Essen

• Repeating slices of an array incrementally by Dominic van Essen

• Fibonacci function or sequence by Dominic van Essen

• Shuffle a subsequence by Dominic van Essen

• An ASCII self-referential sequence by Dominic van Essen

• add entries in the form:

  [<challenge title>](https://codegolf.stackexchange.com/a/<answer-ID>) by [username](https://codegolf.stackexchange.com/users/<user-ID>)
  

List of relevant tips posted in December 2021

• Use ⊒˜ instead of ↕∘≠ by Razetime

• BQN's combinators by Razetime

• add entries in the form:

  [<tip summary>](https://codegolf.stackexchange.com/a/<answer-ID>) by [username](https://codegolf.stackexchange.com/users/<user-ID>)
  

List of relevant challenges posted in December 2021

• add entries in the form:

  [<challenge title>](https://codegolf.stackexchange.com/a/<answer-ID>) by [username](https://codegolf.stackexchange.com/users/<user-ID>)