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function hashStringToInt(s, tableSize) {
  let hash = 17;

  for (let i = 0; i < s.length; i++) {
    hash = (13 * hash * s.charCodeAt(i)) % tableSize;
  }

  return hash;
}

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import { createBrowserHistory } from "history";
import { injectable } from "inversify";
import { makeAutoObservable } from "mobx";
import { useClassStore } from "../util/useClassStore";
import container from "./ioc";

@injectable()
class NavigationStore {
  history = createBrowserHistory();

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How to disable page caching with create-react-app

If you currently not using a service worker resulting in old production caches being used and users not getting new versions of the app.

src/index.js

Use:

import { unregister as unregisterServiceWorker } from './registerServiceWorker'

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Using NVM and node with Apple's new M1 chip

20 January 2021

Rationale

At the time of writing, there are no pre-compiled NodeJS binaries for versions prior to 15.x for Apple's new M1 chip (arm64 architecture).

Additional issues encountered:

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Project root:

yarn add -D --save-exact eslint-config-airbnb eslint-config-airbnb-typescript eslint-config-prettier eslint-config-react-app eslint-import-resolver-typescript eslint-webpack-plugin eslint-plugin-flowtype eslint-plugin-import eslint-plugin-jsx-a11y eslint-plugin-react eslint-plugin-react-hooks babel-eslint eslint-plugin-jest @typescript-eslint/parser @typescript-eslint/eslint-plugin prettier prettier-eslint prettier-eslint-cli eslint-plugin-prettier

$ vim .eslintrc

{
  "plugins": ["prettier", "@typescript-eslint"],

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const strongPassword = new RegExp(
  '^(?=.*[a-z])(?=.*[A-Z])(?=.*[0-9])(?=.*[!@#$%^&*])(?=.{8,})'
);

const mediumPassword = new RegExp(
  '^(((?=.*[a-z])(?=.*[A-Z]))|((?=.*[a-z])(?=.*[0-9]))|((?=.*[A-Z])(?=.*[0-9])))(?=.{6,})'
);

export const isPasswordStrong = (value = ''): boolean => {
  if (strongPassword.test(value)) {

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const array1 = [{num: 1}, {num: 1}, {num: 1}, {num: 1}];

console.log(array1.reduce((count, item) => {
    return count += item.num;
},0))

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export const facebookLogin = async () => {
  try {
    const { type, token } = await Facebook.logInWithReadPermissionsAsync('<YOUR APP ID>', {
      permissions: ['public_profile', 'email', 'user_birthday'],
      behavior: 'native',
    });
    if (type === 'success') {
      // Get the user's name using Facebook's Graph API
      
      const credential = firebase.auth.FacebookAuthProvider.credential(token)

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//Basic sum

#include <stdio.h>

int
main ()
{

  /* variable definition: */
  int num1, num2;

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heroku create <AppName> --buildpack https://github.com/mars/create-react-app-buildpack.git