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const boundaryPrefix = String.raw`(^|\s)`
const boundarySuffix = String.raw`(\s|$)`
/*** Patterns ***/

// Address patterns
const zipPattern = String.raw`\d{5}(?:-\d{4})?`
const cityPattern = String.raw`(?:[A-Z][a-z.-]+[ ]?){0,20}`
const stateAbbrvPattern = String.raw`AL|AK|AS|AZ|AR|CA|CO|CT|DE|DC|FM|FL|GA|GU|HI|ID|IL|IN|IA|KS|KY|LA|ME|MH|MD|MA|MI|MN|MS|MO|MT|NE|NV|NH|NJ|NM|NY|NC|ND|MP|OH|OK|OR|PW|PA|PR|RI|SC|SD|TN|TX|UT|VT|VI|VA|WA|WV|WI|WY`
const cityStateZipPattern = String.raw`${cityPattern},\s*(?:${stateAbbrvPattern}),?\s*${zipPattern}`
const streetSuffixPattern = String.raw`Avenue|Lane|Road|Boulevard|Place|Drive|Street|Ave|Dr|Rd|Blvd|Ln|St|Pl`

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import { get, set, del, setMany, keys } from 'idb-keyval'

export class IDBStore {
  private memoryStore: Record<string, string> = {}
  private useIndexedDB: boolean

  constructor() {
    this.useIndexedDB = typeof window !== 'undefined' && !!window.indexedDB
  }

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export const playNotificationSound = (audioContext: AudioContext) => {
  const oscillator = audioContext.createOscillator();
  const gainNode = audioContext.createGain();

  oscillator.connect(gainNode);
  gainNode.connect(audioContext.destination);

  const options = {
    type: 'sine' as OscillatorType,
    freq: [

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import { useCallback, useEffect } from "react";

/**
 * Represents the parsed details of a keyboard shortcut.
 */
type KeyCombo = {
  key: string; // Original key name (e.g., 'e', 'enter') - useful for display
  code?: string | null; // Expected KeyboardEvent.code (e.g., 'KeyE', 'Enter') - used for matching
  ctrl: boolean; // True if Ctrl key is required
  meta: boolean; // True if Meta key (Cmd/Win) is required

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When does this error occur?

This error occurs when you try to convert a JavaScript object to JSON, but the object contains a circular reference. A circular reference occurs when an object refers to itself, directly or indirectly.

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import * as b64ArrBufferConvertor from "base64-arraybuffer";

const SECRET_HMAC_KEY =
  "209C5BBE79E2752FD1E4E687AD410778DD098546CC9B15ECAB1AEB4F21A46EF2";
async function importHmacSecretKey(secret: string) {
  return crypto.subtle.importKey(
    "raw",
    new TextEncoder().encode(secret),
    { name: "HMAC", hash: "SHA-256" },
    false,

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Javascript Big Timeout

setTimeout caps out at ~25 days. If you need a bigger timeout, use setBigTimeout.

import { setBigTimeout } from "./mod.mts";

const FORTY_DAYS_IN_MILLISECONDS = 3.456e9;

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document.addEventListener("contextmenu", function(event) {
  event.preventDefault();
  
  alert("Right-click is disabled on this website!");
});

// Disable Right-Click for Specific Elements Only
document.getElementById("protected-content").addEventListener("contextmenu", function(event) {
  event.preventDefault();
});

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1. Min-Heap Implementation in TypeScript

We first define a generic MinHeap class with the following operations:

• size(): Returns the number of elements in the heap.
• peek(): Returns the minimum (root) without removing it.
• push(value): Inserts a value, keeping the heap structure.
• pop(): Removes and returns the minimum (root).
• heapifyUp() and heapifyDown(): Internal methods to maintain heap order.

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import ko from 'knockout';

import {getLogger} from 'Util/Logger';

export const serverTimeHandler = {
  computeTimeOffset(serverTimeString: string): void {
    const timeOffset = Date.now() - new Date(serverTimeString).valueOf();
    this.timeOffset(timeOffset);
    this.logger.log(`Current backend time is '${serverTimeString}'. Time offset updated to '${this.timeOffset()}' ms`);
  },