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function onlyUnique<T>(value: T, index: number, self: T[]) {
  return self.indexOf(value) === index;
}

function onlyNonUnique<T>(value: T, index: number, self: T[]) {
  return self.indexOf(value) !== self.lastIndexOf(value);
}

const data = [];

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export type Procedure = (...args: any[]) => void;

function makeSync<F extends Procedure>(
  func: F,
): (this: ThisParameterType<F>, ...args: Parameters<F>) => void {
  let inProgress = false;

  return async function(this: ThisParameterType<F>, ...args: Parameters<F>) {
    const context = this;

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import { useState, useEffect } from 'react';
import { useLocation } from 'react-router-dom';

type Params<T extends string> = { [key in T]: string };

// Returns object that contains all path query parameters listed in the `names` argument.
// If any path query parameters from the `names` is missing in the path, the returned object is undefined.
function useQueryParams<T extends string>(...names: T[]) {
  const location = useLocation();

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export function notEmpty<T>(value: T | null | undefined): value is T {
  return value !== null && value !== undefined;
}

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import { exec, execFile } from 'child_process';

function executeCommand(command: string): Promise<string> {
  return new Promise((resolve, reject) => {
    exec(command, (error, stdout) => {
      if (error) {
        return reject(error);
      }
      return resolve(stdout);
    });

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#!/usr/bin/env node

const { SecretManagerServiceClient } = require('@google-cloud/secret-manager');

const secretManager = new SecretManagerServiceClient();

async function getSecret(name) {
  const [secretVersion] = await secretManager.accessSecretVersion({
    name: `${name}/versions/latest`,
  });

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import {
  RequestHandler,
  Request,
  Response,
  NextFunction,
  Router,
} from 'express';

export enum APIVersion {
  v0 = 'v0',

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#!/bin/sh

DIR=$1
export BUCKET=$2

cd $DIR
ls -l ./ | tr -s ' ' | cut -d' ' -f9 |
    tr ' ' '\n' |
    xargs -n 1 -I{} gsutil -h "Cache-Control:no-cache, max-age=0" cp {} gs://$BUCKET

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#!/usr/bin/env node

const esbuild = require('esbuild');
const path = require('path');

const makeAllPackagesExternalPlugin = {
  name: 'make-all-packages-external',
  setup(build) {
    const filter = /^[^.\/]|^\.[^.\/]|^\.\.[^\/]/; // Must not start with "/" or "./" or "../"
    build.onResolve({ filter }, args => ({ path: args.path, external: true }));

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#!/bin/sh

docker run -p 8000:80 \
  -e GOOGLE_APPLICATION_CREDENTIALS=/path/to/creds/in/container.json \
  -v $GOOGLE_APPLICATION_CREDENTIALS:/path/to/creds/in/container.json \
  gcr.io/$PROJECT_ID/$IMAGE_ID