mars 0.0.2

A data science notebook
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export function sleep(t: number) {
  return new Promise<void>((resolve) => {
    window.setTimeout(() => {
      resolve();
    }, t);
  });
}

export function defined<T>(t: T | undefined | null) {
  if (t === null || t === undefined) {
    throw Error("value was not defined");
  }
  return t;
}