type-safety

import { z } from "zod";

const booleanFromString = z.preprocess((val) => {
  if (typeof val !== "string") return val;
  return ["true", "1", "yes", "on"].includes(val.toLowerCase());
}, z.boolean());

import { z } from "zod";

export const envSchema = z.object({
  VITE_API_URL: z.string().url(),
  VITE_APP_NAME: z.string().min(1).default("my-app"),
  VITE_ENABLE_ANALYTICS: z

// 1. Basic types
let username: string = 'Alex';
let age: number = 30;
let isActive: boolean = true;
let items: string[] = ['item1', 'item2'];
let numbers: Array<number> = [1, 2, 3];

export type EventMap = Record<string, unknown[]>;

type Listener<Args extends unknown[]> = (...args: Args) => void;

export class TypedEmitter<Events extends EventMap> {
  private listeners = new Map<keyof Events, Set<Listener<any>>>();

import { z } from "zod";

const booleanFromString = z
  .string()
  .transform((v) => v.trim().toLowerCase())
  .pipe(z.enum(["true", "false", "1", "0"]))

import { z } from 'zod';

export const signupSchema = z
  .object({
    email: z.string().min(1, 'Email is required').email('Enter a valid email'),
    password: z

export const FLAG_REGISTRY = {
  newDashboard: {
    default: false as boolean,
    description: 'Renders the redesigned dashboard shell',
  },
  maxUploadMb: {

#[derive(Debug, Clone, Copy, PartialEq, Eq)]
struct UserId(u32);

#[derive(Debug, Clone, Copy, PartialEq, Eq)]
struct PostId(u32);

import { initTRPC, TRPCError } from '@trpc/server';

export interface Context {
  user: { id: string; role: 'user' | 'admin' } | null;
  db: DatabaseClient;
}

from dataclasses import dataclass


class ConfigError(Exception):
    pass

import com.fasterxml.jackson.annotation.JsonSubTypes;
import com.fasterxml.jackson.annotation.JsonTypeInfo;
import com.fasterxml.jackson.annotation.JsonTypeInfo.As;
import com.fasterxml.jackson.annotation.JsonTypeInfo.Id;

import java.math.BigDecimal;

import { EventEmitter } from "events";

export interface Job<T> {
  id: string;
  payload: T;
  attempts: number;