新一代AI云原生开发平台

///|
fn main {
  let name = "World!" // Define a variable
  println("Hello, \{name}") // and use it directly
  println("current count:")
  let buf = @buffer.new()
  for i in 1..<10 { // Loop over a range from 1 to 10
    buf.write_string("\{i} ")
  }
  println(buf)
}

///|
enum Resource {
  Text(String)
  CSV(content~ : String)
  Executable
}

///|
let resources : Map[String, Resource] = {
  "hello.txt": Text("Hello, world! A long text."),
  "test.csv": CSV(content="name, age\nAlice, 25\nBob, 30"),
  "ls.exe": Executable,
}

///|
fn main {
  resources
  .iter()
  .filter_map(res => match res {
    (name, Text(str)) | (name, CSV(content=str)) => Some((name, str))
    (_, Executable) => None
  })
  .map(res => {
    let (name, content) = res
    let name = name.pad_start(10, ' ')
    let content = try! content.pad_end(10, ' ').replace_all(old="\n", new=" ")[:10]
    "\{name}: \{content} ..."
  })
  .intersperse("\n")
  .fold(init="Summary:\n", String::add)
  |> println
}

///|
const Zero = 0

///|
fn sign(x : Int) -> Int {
  match x {
    _..<Zero => -1
    Zero => 0
    Zero..<_ => 1
  }
}

///|
fn classify_char(c : Char) -> String {
  match c {
    'a'..='z' => "lowercase"
    'A'..='Z' => "uppercase"
    '0'..='9' => "digit"
    _ => "other"
  }
}

///|
fn main {
  sign(20) |> println
  classify_char('X') |> println
}

///|
fn main {
  let json_example : Json = {
    "array": ["a", "b"],
    "age": 22,
    "name": "John",
    "boolean": true,
  }
  let greeting = match json_example {
    { "age": Number(age, ..), "name": String(name), .. } =>
      "Hello \{name}. You are \{age}"
    _ => "not match"
  }
  greeting |> println
}