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myriad.md

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Install this vscode extension for syntax highlight

Declarations

  • Variables 
    let name = "Roshan Acharya";
  • Constants 
    const name = "Roshan Acharya";

Comments

  • Singleline

    // This is a single line comment

  • Multiline

    /*
    This is a multi line comment
*/

Data Types

  • String

    let name = "Roshan Acharya";

  • Number

    let age = 100;

  • Boolean

    let x = false;
let y = true;

  • Null

    let n = null;

  • Objects

    let age = 100;

let obj = { name: "Roshan Acharya", age };

print(obj.name);
print(obj.age);

  • Arrays

    let arr = ["Roshan", 100, true, false, null];

print(arr[0]);
print(arr[1]);

If Statements

let val;

if (x > 0) {
  val = "positive";
 else if (x < 0) {
  val = "negative";
} else {
  val = "equal";
}

print(val);

Curly braces are optional of body has single statement

let val;

if (x > 0) val = "positive";
else if (x < 0) val = "negative";
else val = "equal";

print(val);

Also parenthesis are optional in test condition.

let val;

if x > 0
  val = "positive";
else if x < 0
  val = "negative";
else
  val = "equal";

print(val);

Function Statements

func log(val){
    print(val);
}

Funcions return last expression by default

func add(x, y){
    x + y;
}

Or you can use the return keyword

func add(x, y){
    return x + y;
}

Function Expressions

You can define functions as a expressions too. Similar to function statements without function name.

const add = func (x, y) {
  return x + y;
}

Loops

  • While

    let x = 0;

while (x < 20) {
  if (x == 10) continue;

  const y = calculateY(x);

  if (y == null) break;

  print("Value of x is: ", x);

  x++;
}

  • For

    for (let i = 0; i < 20; i++) {}

Try Catch

try {
  const x = calculateValue();

  if (x == null) {
    throw "Something went wrong";
  }
} catch (err) {
  print(err);
}

Import and Export

  • export

    func add(x, y) {
  x + y;
}

func sub(x, y) {
  x - y;
}

export { add, sub };

  • import

    You can import both builtin module and file using import

    import "vector" vec; // builtin module

import "./ops.myriad" ops; // custom file

const sum = ops.add(1, 2);

const vec = vec.create(2, 4);

String methods

  • length

    let name = "Roshan";

print(name.length()); // 6

  • split

    let name = "Roshan Acharya";

print(name.split(" ")); // ["Roshan", "Acharya"]

  • replace

    let name = "Roshan".replace("R", "r"); // roshan

  • uppercase

    let name = "Roshan";

print(name.uppercase()); // ROSHAN

  • lowercase

    let name = "Roshan";

print(name.lowercase()); // roshan

Array methods

  • length

    print([1, 2, 3].length()); // 3

  • join

    print([1, 2, 3].join("-")); // 1-2-3

  • pop

    ["a", "b", "c"].pop(); // c

  • push

    ["a", "b", "c"].push("d"); // 4

  • includes

    [1, 2, 3].includes(2); // true

  • foreach

    [1, 2, 3].forEach(func (val, i) {
  print(val, i);
})

Global Functions

  • format

    format("My Name is {}", "Roshan");

  • print

    print("Hello World");

  • input

    input("> Enter your age ");

  • typeof

    typeof(34);

Global Objects

Math

  • rand
  • abs
  • ceil
  • floor
  • round
  • cos
  • sin
  • tan

Json

  • stringify

    json.stringify(obj);

  • parse

    json.parse(str);

dt

  • now

    dt.now();

  • date

    const date = dt.date("2000-01-01");

date.date();
date.year();
date.month();

http

  • server

    const server = http.server(func (req, res){

    if(req.url == "/json") {
        res.set_header("Content-Type", "application/json");

        const msg = json.stringify({ message: "Hello World" });
        res.send(msg);

        return;
    }

    if(req.method == "POST") {
      const body = json.parse(req.body);

      res.send("Your name is: " + body.name);

      return;
    }

    print(req.headers);

    res.send("Hello World");
})

server.listen(3000);

print("Listening on port 3000");

fs

  • write

    fs.write("file.txt", "Hello");

  • read

    fs.read("file.txt");

  • stat

    fs.stat("file.txt");

  • mkdir

    fs.mkdir("testdir");

  • readdir

    fs.readdir("testdir");

  • rmrf

    fs.rmrf("directory");

run_node

  • run

    run_node.run(`console.log("Hello")`);