One code - All languages

[zenorocha]

Hey everyone!

In order to improve the quality and standardize our screenshots, we created this code snippet:

Snippet

/*
 * Once upon a time...
 */

class Vampire {
  constructor(props) {
    this.location = props.location;
    this.birthDate = props.birthDate;
    this.deathDate = props.deathDate;
    this.weaknesses = props.weaknesses;
  }

  get age() {
    return this.calcAge();
  }

  calcAge() {
    return this.deathDate - this.birthDate;
  }
}

// ...there was a guy named Vlad

const Dracula = new Vampire({
  location: 'Transylvania',
  birthDate: 1428,
  deathDate: 1476,
  weaknesses: ['Sunlight', 'Garlic']
}); 

Why this is cool?

• It contains examples of string, number, and array
• It contains examples of single line and multi-line comments
• It contains examples of inheritance and functions
• It's simple, funny, and silly

Where to store them?

They are going to be kept on the template repo under the sample folder. This will help new theme authors to create their screenshots.

Help us with other languages!

Leave a comment on this thread with that same code snippet in other programming languages.

• Javascript
• Typescript
• Dart
• Python
• Markdown
• HTML
• CSS
• PHP
• Ruby
• Java
• Kotlin
• Swift
• Go
• Scala
• Rust
• C
• C++
• B4X
  ...

[danspinola]

Python

'''
Once upon a time...
'''

class Vampire:
    def __init__(self, traits):
        self.location = traits['location']
        self.birth_date = traits['birth_date']
        self.death_date = traits['death_date']
        self.weaknesses = traits['weaknesses']
        
    def get_age(self):
        return self.calc_age()
    
    def calc_age(self):
        return self.death_date - self.birth_date

# ...there was a guy named Vlad

Dracula = Vampire({
  'location': 'Transylvania',
  'birth_date': 1428,
  'death_date': 1476,
  'weaknesses': ['Sunlight', 'Garlic']
})

[zenorocha]

🐍🐍🐍

[lucassiqueirago]

B4X

' /*
' * Once upon a time...
' */

Sub Class_Globals
	Private location,birthDate,birthDate,deathDate,weaknesses As String
End Sub

Public Sub Initialize(props As Map)
	location = props.Get("location")
	birthDate = props.Get("birthDate")
	deathDate = props.Get("deathDate")
	weaknesses = props.Get("weaknesses")
End Sub

Public Sub age As Int
	Return calcAge
End Sub

Private Sub calcAge As Int
	Return deathDate - birthDate
End Sub

' // ...there was a guy named Vlad
Public Sub createDracula
	Private Dracula As Vampire
	
	Dracula.Initialize(CreateMap( _
		"location": "Transylvania", _ 
		"birthDate": 1428, _
		"deathDate": 1476, _
		"weaknesses": Array As String("Sunlight", "Garlic") ) )
End Sub

[zenorocha]

Looks great!

[owenvoke]

PHP

/*
 * Once upon a time...
 */

class Vampire
{
    public string $location;
    public int $birthDate;
    public int $deathDate;
    public array $weaknesses;

    public function __construct(array $props)
    {
        $this->location = $props['location'];
        $this->birthDate = $props['birthDate'];
        $this->deathDate = $props['deathDate'];
        $this->weaknesses = $props['weaknesses'];
    }

    public function age(): int
    {
        return $this->calcAge();
    }

    private function calcAge(): int
    {
        return $this->deathDate - $this->birthDate;
    }
}

// ...there was a guy named Vlad

$Dracula = new Vampire([
    'location' => 'Transylvania',
    'birthDate' => 1428,
    'deathDate' => 1476,
    'weaknesses' => ['Sunlight', 'Garlic']
]);

[zenorocha]

Thanks @owenvoke!

[milouse]

Ruby 🙂

#
# Once upon a time...
#

class Vampire
  def initialize(opts)
    @location = opts[:location]
    @birthDate = opts[:birthDate]
    @deathDate = opts[:deathDate]
    @weaknesses = opts[:weaknesses]
  end

  def age
    calcAge
  end

  private

  def calcAge
    @deathDate - @birthDate
  end
end

# ...there was a guy named Vlad

dracula = Vampire.new(
  location: 'Transylvania',
  birthDate: 1428,
  deathDate: 1476,
  weaknesses: %w[Sunlight Garlic]
)

puts dracula.age

[zenorocha]

That's great @milouse! I'm wondering if we need the first line (frozen_string_literal: true) and the last line (puts dracula.age)?

[alexandervalencia]

Neither are needed, frozen_string_literal: true is just a modern Ruby convention (for files pre 3.0), it's a magic comment that tells the interpreter that this file should treat all strings as 'some string'.freeze. puts dracula.age is essentially console.log(dracula.age).

Also weaknesses: %w[Sunlight, Garlic] should be written as: weaknesses: %w[Sunlight Garlic] because commas inside of array literals can have unintended effects. Essentially, as written it would become: ['Sunlight,', 'Garlic']

[milouse]

Hi,

Yes the first comment is something really common in the ruby ecosystem, thus I thought it would help to match the reality. However it’s a workaround, thus yeah, in a near future it will be more noisy than helping. That’s why I will remove it.

I’ve fix the array literal, sorry my bad 😕

Regarding the last line, I took the liberty to add it. Effectively it’s not in your exemple, and even if I understood the « just a non-sense exemple » goal, I thought it will be interesting to display an exemple of two more thing: a direct function call (put) and a method access on an object instance (dracula.age). I add it after seeing the same exemple in the C exemple bellow (with the get_age call). That said, I’ve not a strong opinion about that, thus I can remove it either.

[benmezger]

C!

#include <stdlib.h>

struct Vampire {
  char *location;
  int birthday;
  int deathdate;
  char *weaknesses[2];
};

int _calcAge(struct Vampire *v) { return v->deathdate - v->birthday; }

int get_age(struct Vampire *v) { return _calcAge(v); }

int main() {

  struct Vampire v;

  /* There was a guy named Vlad */
  v.location = malloc(12 * sizeof(char));
  v.location = "Transylvania";
  v.birthday = 1428;
  v.deathdate = 1476;
  v.weaknesses[0] = "Sunlight";
  v.weaknesses[1] = "Garlic";

  get_age(&v);

  return 0;
}

[zenorocha]

That's awesome @benmezger! Would you mind renaming birthday to birthdate? Do we need a malloc on the location? I'm wondering if we can have a line break on the calcAge and get_age functions as well.

Thanks!

[leandrodiniz]

Typescript

/*
 * Once upon a time...
 */

interface VampireProps {
  location: string;
  birthDate: number;
  deathDate: number;
  weaknesses: string[];
}

class Vampire {
  location: string;
  birthDate: number;
  deathDate: number;
  weaknesses: string[];

  constructor(props: VampireProps) {
    this.location = props.location;
    this.birthDate = props.birthDate;
    this.deathDate = props.deathDate;
    this.weaknesses = props.weaknesses;
  }

  get age(): number {
    return this.calcAge();
  }

  calcAge(): number {
    return this.deathDate - this.birthDate;
  }
}

// ...there was a guy named Vlad

const Dracula: VampireProps = new Vampire({
  location: 'Transylvania',
  birthDate: 1428,
  deathDate: 1476,
  weaknesses: ['Sunlight', 'Garlic'],
});

[zenorocha]

This is perfect, thanks @leandrodiniz!

[ninh-huynh]

Kotlin 😄

/*
 * Once upon a time ... 
 */

class Vampire(
        val location: String,
        val birthDate: Int,
        val deathDate: Int,
        val weaknesses: Array<String>
) {
    val age: Int
        get() = this.calcAge()

    fun calcAge() =
        this.deathDate - this.birthDate
}

// ... there was a guy named Vlad

fun main() {
    val Dracula = Vampire(
        "Transylvania",
        1428,
        1476,
        arrayOf("Sunlight", "Garlic")
    )
}

[zenorocha]

That's great @kim-ninh! Would you mind standardizing the indentation? I see that some lines have more tabs than others.

[ninh-huynh]

I've fixed it.
It's weird because I just copy the code from IDE that already formats correctly.

[tassianoalencar]

Java

class Vampire {
    private String location;
    private int birthDate;
    private int deathDate;
    private String[] weaknesses;

    public Vampire(String location, int birthDate, int deathDate, String[] weaknesses) {
        this.location = location;
        this.birthDate = birthDate;
        this.deathDate = deathDate;
        this.weaknesses = weaknesses;
    }

    public int getAge() {
        return this.calcAge();
    }

    public int calcAge() {
        return this.deathDate - this.birthDate;
    }
}

// ...there was a guy named Vlad

Vampire vampire = new Vampire(
  "Transylvania",
  1428,
  1476,
  new String[] {"Sunlight", "Garlic"}
); 

[zenorocha]

Thank you so much @tassianoalencar! What do you think of these lines like this?

Vampire vampire = new Vampire(
    "Transylvania",
    1428,
    1476,
    {"Sunlight", "Garlic"}
); 

I haven't done anything with Java in years, so feel free to correct me if I'm wrong.

Also, can you include the top comment?

[tassianoalencar]

Java does not work with parameter without typing. But...

Vampire vampire = new Vampire(
        "Transylvania",
        1428,
        1476,
        new String[] {"Sunlight", "Garlic"}
    ); 

It's working :)

[zenorocha]

Awesome!

[quietw0lf]

Go

package main

import "fmt"

/*
  Once upon a time...
*/

type Vampire struct {
  Location   string
  BirthDate  int
  DeathDate  int
  Weaknesses []string
}

func (v *Vampire) Age() int {
  return v.calcAge()
}

func (v *Vampire) calcAge() int {
  return v.DeathDate - v.BirthDate
}

// ...there was a guy named Vlad

func main() {
  dracula := &Vampire{
    Location:   "Transylvania",
    BirthDate:  1428,
    DeathDate:  1476,
    Weaknesses: []string{"Sunlight", "Garlic"},
  }

  fmt.Println(dracula.Age())
}

[zenorocha]

This is great, thanks @VladimirTkachenko!

[matuzalemsteles]

Rust

// Once upon a time...

#[derive(Debug)]
pub struct Vampire {
	location: String,
	birth_date: u16,
	death_date: u16,
	weaknesses: Vec<String>,
}

impl Vampire {
	pub fn new(
		location: String,
		birth_date: u16,
		death_date: u16,
		weaknesses: Vec<String>,
	) -> Self {
		Vampire {
			location,
			birth_date,
			death_date,
			weaknesses,
		}
	}

	pub fn age(&self) -> u16 {
		self.calc_age()
	}

	fn calc_age(&self) -> u16 {
		self.death_date - self.birth_date
	}
}

// ...there was a guy named Vlad

fn main() {
	let dracula = Vampire::new(
		"Transylvania".to_string(),
		1428,
		1476,
		vec!["Sunlight".to_string(), "Garlic".to_string()],
	);

	println!("{:?}", dracula);
}

[zenorocha]

Great to hear from you @matuzalemsteles! Thanks for sending this 🎉

[benknoble]

Here's an SML version (I have an alternate). I dropped the getter (SML doesn't have them, and it doesn't really have "objects") and renamed calcAge to age. Also, SML doesn't have single line comments.

(*
 * Once upon a time...
 *)

structure Vampire = struct
  type params = {location: string,
                 birthDate: int,
                 deathDate: int,
                 weaknesses: string list}
  type vampire = params
  fun new (v : params) : vampire = v
  fun age (v : vampire) : int = (#deathDate v) - (#birthDate v)
end

(* ...there was a guy named Vlad *)

structure Romainia = struct
  val dracula = Vampire.new {location="Transylvania",
                             birthDate=1428,
                             deathDate=1476,
                             weaknesses=["Sunlight", "Garlic"]}
end

[zenorocha]

Nice @benknoble!

[hedyhli]

Hmm, how will it work for markdown and HTML?

[zenorocha]

Let me try something @hedythedev...

[zenorocha]

HTML

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Dracula</title>
</head>
<body>
  <!--
    Once upon a time...
  -->

  <h1>Vampires</h1>

  <form>
    <label for="location">Location</label>
    <input type="text" name="location" value="Transylvania">

    <label for="birthDate">Birth Date:</label>
    <input type="number" name="birthDate" value="1428">

    <label for="deathDate">Death Date:</label>
    <input type="number" name="deathDate" value="1476">

    <label for="weaknesses">Weaknesses:</label>
    <input type="checkbox" name="weaknesses" value="Sunlight" checked>
    <input type="checkbox" name="weaknesses" value="Garlic" checked>

    <button type="submit">Submit</button>
  </form>

  <script>
    // ...there was a guy named Vlad
    const form = document.querySelector('form');
    form.addEventListener('submit', calcAge);

    function calcAge(e) {
      e.preventDefault();

      const { birthDate, deathDate } = e.target;
      const age = deathDate.value - birthDate.value;
      console.log(age);
    }
  </script>
</body>
</html>

[hedyhli]

Cool, so for markdown how about a something like

<!--
  Once a upon a time...
-->

# Vampires

| Name         | Value            |
|--------------|------------------|
| location     | Transylvania     |
| birth date   | 1428             |
| death date   | 1476             |
| weaknesses   | Sunlight, Garlic |

<!-- ...There was a guy named Vlad -->

> The **age** is the `deathDate` minus the `birthDate`

[zenorocha]

I like that @hedythedev!

[caiangums]

C++! (Format based on "Google" option from this tool)

#include <string>
#include <vector>

typedef std::vector<std::string> weaknesses_list;

/*
 * Once upon a time...
 */
class Vampire {
 private:
  std::string _location;
  int _birth_date;
  int _death_date;
  weaknesses_list *_weaknesses;

 public:
  Vampire(std::string location, int birth_date, int death_date,
          weaknesses_list *weaknesses)
      : _location(location),
        _birth_date(birth_date),
        _death_date(death_date),
        _weaknesses(weaknesses) {}

  int age() { return this->calc_age(); }

 private:
  int calc_age() { return this->_death_date - this->_birth_date; }
};

/* ...there was a guy named Vlad */
int main() {
  std::string location = "Transylvania", weakness_sunlight = "Sunligth",
              weakness_garlic = "Garlic";
  int birth_date = 1428, death_date = 1476;
  weaknesses_list *weaknesses = new weaknesses_list();
  weaknesses->push_back(weakness_sunlight);
  weaknesses->push_back(weakness_garlic);

  Vampire *dracula = new Vampire(location, birth_date, death_date, weaknesses);

  return 0;
}

[zenorocha]

Looks great @caiangums! I just changed the comment order :)

[caiangums]

Awesome! Just wondering but, should we create a PR for the sample repo? 🤔

[ianyepan]

@zenorocha @caiangums
I rewrote your C++ code a bit to make it more concise, adhere to modern (post-C++11) standards, and more 'faithful' to OP's Javascript version. Formatted with the same tool using the "Google" style.

#include <string>
#include <vector>

/*
 * Once upon a time...
 */

class Vampire {
 public:
  Vampire(std::string location, int birth_date, int death_date,
          std::vector<std::string> weaknesses)
      : _location{location},
        _birth_date{birth_date},
        _death_date{death_date},
        _weaknesses{weaknesses} {}

  int age() { return calc_age(); }

 private:
  std::string _location;
  int _birth_date;
  int _death_date;
  std::vector<std::string> _weaknesses;

  int calc_age() { return _death_date - _birth_date; }
};

// ...there was a guy named Vlad

int main() {
  std::string location = "Transylvania";
  int birth_date = 1428, death_date = 1476;
  std::vector<std::string> weaknesses { "Sunlight", "Garlic" };

  Vampire dracula{location, birth_date, death_date, weaknesses};

  return 0;
}

[caiangums]

Awesome! 👏

[zenorocha]

CSS

/*
* Once upon a time...
*/

:root {
  --birthDate: 1428px;
  --deathDate: 1476px;
}

body {
  background: #000;
}

/* ...there was a guy named Vlad */

#dracula {
  opacity: 0;
  display: none;
  visibility: hidden;
  font-family: "Transylvania";
  height: calc(var(--deathDate) - var(--birthDate));
}

.cape {
  background: #ff0000 !important;
}

@font-face {
  font-family: 'Transylvania';
  src: url('/location/Transylvania.woff2') format('woff2');
  font-weight: 700;
  font-style: normal;
}

[WhiteVermouth]

Swift

/*
 * Once upon a time...
 */

class Vampire {
    
    var location: String
    var birthDate: Int
    var deathDate: Int
    var weaknesses: [String]
    
    init(location: String, birthDate: Int, deathDate: Int, weaknesses: [String]) {
        self.location = location
        self.birthDate = birthDate
        self.deathDate = deathDate
        self.weaknesses = weaknesses
    }
    
    var age: Int {
        self.calcAge()
    }
    
    func calcAge() -> Int {
        self.deathDate - self.birthDate
    }
}

// ...there was a guy named Vlad

let dracula = Vampire(location: "Transylvania", birthDate: 1428, deathDate: 1476, weaknesses: ["Sunlight", "Garlic"])

[WhiteVermouth]

Scala

/*
 * Once upon a time...
 */
class Vampire(location: String, birthDate: Int, deathDate: Int, weaknesses: Array[String]) {
  def age(): Int = {
    calcAge()
  }

  def calcAge(): Int = {
    this.deathDate - this.birthDate
  }

}

// ...there was a guy named Vlad
val dracula = new Vampire(location = "Transylvania", birthDate = 1428, deathDate = 1476, weaknesses = Array("Sunlight", "Garlic"))

[Kab1r]

Dart

/*
 * Once upon a time...
 */

class Vampire {
  String location;
  int birthDate, deathDate;
  List<String> weaknesses;

  Vampire({this.location, this.birthDate, this.deathDate, this.weaknesses});

  int get age => this.calcAge();

  int calcAge() => this.deathDate - this.birthDate;
}

void main() {
  // ...there was a guy named Vlad
  final Dracula = Vampire(
      location: 'Transylvania',
      birthDate: 1428,
      deathDate: 1476,
      weaknesses: ['Sunlight', 'Garlic']);
}

[jaminthorns]

Elixir

defmodule Vampire do
  @moduledoc """
  Once upon a time...
  """

  defstruct [:location, :birth_date, :death_date, :weaknesses]

  def new(props) do
    %__MODULE__{
      location: props[:location],
      birth_date: props[:birth_date],
      death_date: props[:death_date],
      weaknesses: props[:weaknesses]
    }
  end
  
  def age(vampire) do
    calc_age(vampire)
  end

  defp calc_age(vampire) do
    vampire.death_date - vampire.birth_date
  end
end

# ...there was a guy named Vlad

dracula = Vampire.new(
  location: "Transylvania",
  birthDate: 1428,
  deathDate: 1476,
  weaknesses: ["Sunlight", "Garlic"]
)

[phinheiro]

I didn't found a C# snippet, so I created this one... 😄

    /*
    * Once upon a time...
    */

    public class Vampire {
        public string Location { get; private set; }
        public int BirthDate { get; private set; }
        public int DeathDate { get; private set; }
        public string[] Weaknesses { get; private set; }

        public Vampire(string location, int birthDate, int deathDate, string[] weaknesses) {
            Location = location;
            BirthDate = birthDate;
            DeathDate = deathDate;
            Weaknesses = weaknesses;
        }

        public int Age() {
            return calcAge();
        }
        
        private int calcAge() {
            return DeathDate - BirthDate;
        }
    }
    class Program {
        static void Main(string[] args) {
            // ...there was a guy named Vlad

            var vampire = new Vampire(
                "Transylvania",
                1428,
                1476,
                new string[] {"Sunlight", "Garlic"}
            );
        }
    }

[avelino]

Clojure

(comment
  "Once upon a time...")

(ns clj-dracula)

(defstruct dracula :location :birth-date :death-date :weaknesses)

(defn age
  [vamp] (- (vamp :death-date) (vamp :birth-date)))

;;...there was a guy named Vlad
(let [d (struct dracula "Transylvania" 1428 1476 '("Sunlight", "Garlic"))]
  (println (age d)))

[avelino]

@zenorocha should these examples be placed in the template repository?

[zenorocha]

All code samples have been moved to the template repository. 🎉

Thank you all for contributing!