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class SampleService {
    constructor(connection) {
        this.model = connection.models['sample'];
        this.connection = connection;
    }
    
    async findById(id) {
        return this.model.findById(id);
    }
}

kevboutin

const mongoose = require('mongoose').set('debug', process.env.NODE_ENV !== 'production');
const SampleService = require('./sampleService');
const DatabaseCache = require('./databaseCache');

// The time-to-live in seconds for each cache entry.
const cacheTtl = process.env.CACHE_TTL || 3600;
// The cache must live in global scope so it remains in memory between invocations.
let databaseCache = new DatabaseCache(cacheTtl);

const sampleFunctionHandler = async (context, req) => {

kevboutin

const DatabaseService = require('./databaseService');

/**
 * Database options.
 * @typedef {Object.<string, boolean|number|string>} DatabaseOptions
 */

/**
 * A cache entry.
 * @typedef {Object} CacheEntry

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const mongoose = require('mongoose').set('debug', process.env.NODE_ENV !== 'production');

/** @constant {boolean} */
const DB_BUFFER_COMMANDS = process.env.DB_BUFFER_COMMANDS === 'true';

/**
 * Database options.
 * @typedef {Object.<string, boolean|number|string>} DatabaseOptions
 */

kevboutin

const twilio = require('twilio');

const TAG = 'smsUtility';

/**
 * Send an SMS text message.
 *
 * Example response from Twilio:
 * {
 *   "account_sid": "ACXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX",

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const sgMail = require('@sendgrid/mail');

sgMail.setTimeout(40000);

const TAG = 'emailUtility';
const DEFAULT_SENDER = '[email protected]';

/**
 * Send an email.
 *

kevboutin

const groupBy = (arr, groupFn) => {
  const grouped = {};
  for (const obj of arr) {
    const groupName = groupFn(obj);
    if (!grouped[groupName]) {
      grouped[groupName] = [];
    }
    grouped[groupName].push(obj);
  }
  return grouped;

kevboutin

/* The old way:
const reverseString = (str) => {
  let reversed = '';
  for (let i = str.length - 1; i >= 0; i--) {
    const ch = str[i];
    reversed += ch;
  }
  return reversed;
};
const reverse = reverseString('javascript');

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const areEqual = (arr1, arr2) =>
  arr1.sort().join(',') === arr2.sort().join(',');
const arr1 = [1, 2, 3, 4];
const arr2 = [3, 4, 1, 2];
const arr3 = [1, 2, 3];
console.log(areEqual(arr1, arr2)); // true
console.log(areEqual(arr1, arr3)); // false

kevboutin

const removeDuplicates = (arr) => [...new Set(arr)];
const arr = [1, 2, 3, 4, 5, 3, 1, 2, 5];
const distinct = removeDuplicates(arr);
console.log(distinct); // [1, 2, 3, 4, 5]