Arc ⚡

fn fetchUsers() {
  @GET("https://api.example.com/users")
    |> filter(u => u.active)
    |> map(u => u.name)
    |> sort()
}

async function fetchUsers() {
  const res = await fetch(
    "https://api.example.com/users"
  );
  const data = await res.json();
  return data
    .filter(u => u.active)
    .map(u => u.name)
    .sort();
}

let msg = match response.status {
  200 => "OK",
  404 => "Not found",
  500..599 => "Server error",
  _ => "Unknown: {response.status}"
}

let msg;
if (response.status === 200) {
  msg = "OK";
} else if (response.status === 404) {
  msg = "Not found";
} else if (response.status >= 500 && response.status < 600) {
  msg = "Server error";
} else {
  msg = `Unknown: ${response.status}`;
}

let [weather, news, stocks] = fetch [
  @GET "api/weather?city=NYC",
  @GET "api/news/top?n=5",
  @GET "api/stocks/AAPL"
]

let summary = news.articles
  |> take(3)
  |> map(a => "• {a.title}")
  |> join("\n")

const [weather, news, stocks] =
  await Promise.all([
    fetch("api/weather?city=NYC")
      .then(r => r.json()),
    fetch("api/news/top?n=5")
      .then(r => r.json()),
    fetch("api/stocks/AAPL")
      .then(r => r.json())
  ]);

const summary = news.articles
  .slice(0, 3)
  .map(a => `• ${a.title}`)
  .join("\n");