Learn a language!

∀ language

• What?
• Beard?
• FizzBuzz?
• Interesting?
• Changed my thinking?

Beard 🧔 !?

Computer languages and facial hair 🔗

Jan Ouwens

│ EqualsVerifier │ jqno.nl │ jqno

#fantasticlanguages

- properties

- creator

James Gosling

- creator

Beard: ✅

- what does it look like?

public class Program {
    public static void main(String...args) {
        for (int i = 1; i <= 100; i++) {
            if (i % 15 == 0) {
                System.out.println("FizzBuzz");
            }
            else if (i % 3 == 0) {
                System.out.println("Fizz");
            }
            else if (i % 5 == 0) {
                System.out.println("Buzz");
            }
            else {
                System.out.println(i);
            }
        }
    }
}

- what makes it interesting?

- what did I learn from it?

- properties

- creator

John Kemeny & Thomas Kurtz

- creator

Beard: ❌❌

- what does it look like?

10 FOR I = 1 to 100
20 LET S$ = ""
30 IF I % 3 = 0 THEN LET S$ = S$ + "FIZZ"
40 IF I % 5 = 0 THEN LET S$ = S$ + "BUZZ"
50 IF S$ = "" THEN LET S$ = I
60 PRINT S$
70 NEXT I

- what makes it interesting?

- what did I learn from it?

- properties

- creator

Let’s just say it was this guy

- creator

Beard: ✅

- what does it look like?

1, 2, fizz, 4, buzz, fizz, 7, 8, fizz, buzz, 11, fizz, 13, 14, fizzbuzz, 16, 17, fizz, 19, buzz, fizz, 22, 23, fizz, buzz, 26, fizz, 28, 29, fizzbuzz

- what makes it interesting?

The Great Vowel Shift

- what did I learn from it?

- properties

- creator

Rasmus Lerdorf

- creator

Beard: ❌

- what does it look like?

<?php
for ($i = 1; $i <= 100; $i++)
{
    if (!($i % 15))
        echo "FizzBuzz\n";
    else if (!($i % 3))
        echo "Fizz\n";
    else if (!($i % 5))
        echo "Buzz\n";
    else
        echo "$i\n";
}
?>

- what makes it interesting?

- what did I learn from it?

- properties

- creator

Evan Czaplicki

- creator

Beard: 🤷

- what does it look like?

import Html exposing (text)
import List exposing (map)

main =
  List.range 1 100 |> map getWordForNum |> String.join " "
 
getWordForNum num =
  if modBy num 15 == 0 then
    "FizzBuzz"
  else if modBy num 3 == 0 then
    "Fizz"
  else if modBy num 5 == 0 then
    "Buzz"
  else
    String.fromInt num

- what makes it interesting?

I got to the end of the line without seeing the closing double quote:

6| helloworld = "Hello world
                             ^
Strings look like "this" with double quotes on each end. Is the closing double
quote missing in your code?

Note: For a string that spans multiple lines, you can use the multi-line string
syntax like this:

    """
    # Multi-line Strings
    
    - start with triple double quotes
    - write whatever you want
    - no need to escape newlines or double quotes
    - end with triple double quotes
    """

- what did I learn from it?

- properties

- creator

John McCarthy

- creator

Beard: ✅ ✅ ✅

- what does it look like?

(define (fizzbuzz x y)
  (cond ((eq? (remainder x 15) 0) (display "FizzBuzz\n"))
        ((eq? (remainder x 3) 0) (display "Fizz\n"))
        ((eq? (remainder x 5) 0) (display "Buzz\n"))
        (else (display x) (display "\n")))

  (cond ((< x y) (fizzbuzz (+ x 1) y))
        (else ())))

(fizzbuzz 1 100)

- what makes it interesting?

Minimal syntax, maximal power

(println "Hello world")

(+ 1 (* 2 3) 4)

(define Y
  (lambda (f)
    (f (lambda (x) ((Y f) x)))))

- what did I learn from it?

- properties

- creator

Unknowable

- creator

Beard:

- what does it look like?

١ ،٢، فيز، ٤، بوز، فيز، ٧، ٨، فيز، بوز، ١١، فيز، ١٣، ١٤، فيزبوز، ١٦، ١٧، فيز، ١٩، بوز، فيز، ٢٢، ٢٣، فيز، بوز، ٢٦، فيز، ٢٨، ٢٩، فيزبوز

- what makes it interesting?

- what did I learn from it?

- properties

- creator

Yukihiro Matsumoto

- creator

Beard: ✅

- what does it look like?

1.upto 100 do |i|
  puts "FizzBuzz" if i % 15 == 0
  puts "Fizz" if i % 3 == 0 and i % 5 != 0
  puts "Buzz" if i % 3 != 0 and i % 5 == 0
  puts i if i % 3 != 0 and i % 5 != 0
end

- what makes it interesting?

class Integer
  def to_xml
    "<int>#{self}</int>"
  end
end

puts 10.to_xml

class Module
  alias private_old private
  alias public_old public
  alias private public_old
  alias public private_old
end

- what did I learn from it?

- properties

- creator

Anders Hejlsberg

- creator

Beard: ❌

- what does it look like?

program FizzBuzz;
var
  i: Integer;
begin
  for i := 0 to 100 do
  begin
    if i mod 15 = 0 then
      WriteLn('FizzBuzz');
    else if i mod 3 = 0 then
      WriteLn('Fizz');
    else if i mod 5 = 0 then
      WriteLn('Buzz');
    else
      WriteLn(IntToStr(i));
  end;
end.

- what makes it interesting?

- what did I learn from it?

- properties

- creator

Anders Hejlsberg

- creator

Beard: ❌

- what does it look like?

using System;

class Program
{
    static void Main(string[] args)
    {
        for (int i = 1; i <= 100; i++)
        {
            if (i % 15 == 0)
            {
                Console.WriteLine("FizzBuzz");
            }
            else if (i % 3 == 0)
            {
                Console.WriteLine("Fizz");
            }
            else if (i % 5 == 0)
            {
                Console.WriteLine("Buzz");
            }
            else
            {
                Console.WriteLine(i);
            }
        }
    }
}

- what makes it interesting?

LINQ

var popular = from lang in languages
              where lang.Creator.HasBeard
              select lang.Name;

- what did I learn from it?

- properties

- creator

Anders Hejlsberg

- creator

Beard: ❌

- what does it look like?

for (let i = 1; i < 101; i++) {
    if (i % 15 === 0) {
        console.log('FizzBuzz')
    }
    else if (i % 3 === 0) {
        console.log('Fizz')
    }
    else if (i % 5 === 0) {
        console.log('Buzz')
    }
    else {
        console.log(i)
    }
}

- what does it look like?

for (let i: number = 1; i < 101; i++) {
    if (i % 15 === 0) {
        console.log('FizzBuzz')
    }
    else if (i % 3 === 0) {
        console.log('Fizz')
    }
    else if (i % 5 === 0) {
        console.log('Buzz')
    }
    else {
        console.log(i)
    }
}

- what makes it interesting?

// Lodash's pick() function

function pick(object, paths)

pick({ a: 1, b: 2, c: 3, d: 4 }, ['a', 'd'])
===> { a: 1, d:4 }

- what makes it interesting?

// Lodash's pick() function

function pick(object, paths)

pick({ a: 1, b: 2, c: 3, d: 4 }, ['a', 'd'])
===> { a: 1, d:4 }

function pick<O extends object, Keys extends keyof O>
             (object: O, paths: Keys[]): { [K in Keys]: O[K] }

- what did I learn from it?

- what did I learn from it?

- properties

- creator

Me!

- creator

Beard: ✅

- what does it look like?

import nl.jqno.annotationscript.AnnotationScript;
import nl.jqno.annotationscript.Annotations.*;

@Zero("begin")
@Zero(list={@One("define"), @One("fizz-buzz"), @One(list={@Two("lambda"), @Two(list=@Three("n")), @Two(list={
    @Three("cond"),
    @Three(list={@Four("="), @Four(list={@Five("%"), @Five("n"), @Five("15")}), @Four("0")}), @Three("'fizzbuzz'"),
    @Three(list={@Four("="), @Four(list={@Five("%"), @Five("n"), @Five("3")}), @Four("0")}), @Three("'fizz'"),
    @Three(list={@Four("="), @Four(list={@Five("%"), @Five("n"), @Five("5")}), @Four("0")}), @Three("'buzz'"),
    @Three("else"), @Three("n")})})})
@Zero(list={@One("map"), @One("println"), @One(list={@Two("map"), @Two("fizz-buzz"), @Two(list={@Three("range"), @Three("1"), @Three("101")})})})
public class FizzBuzz {
    public static void main(String[] args) {
        AnnotationScript.run(FizzBuzz.class);
    }
}

- what makes it interesting?

@Autowired @Bean
@Column(name = "id")
@PostMapping("/endpoint/new")
@Test
public void waitwhat() { ... }

- what did I learn from it?

(begin
  (define fizz-buzz (lambda (n) (cond
    (= (% n 15) 0) 'fizzbuzz
    (= (% n 3) 0) 'fizz
    (= (% n 5) 0) 'buzz
    else n)))
  (map println (map fizz-buzz (range 1 101))))

FIN

jqno.nl/talks/fantasticlanguages

#fantasticlanguages