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Where Future [Programmers] Begin
& Code Becomes Confidence.

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Extended IDE
Into Codeblock

Turn complex lessons into simplified, interactive Codeblocks - designed to boost understanding and make learning to code more intuitive.


type User = { name: string; email?: string };

function sendEmail(user: User) {
  // ❌ Error if email is undefined
  console.log("Sending email to:", user.email.toUpperCase()); 
}

const newUser: User = { name: "Alice" };
sendEmail(newUser); // ❌ TypeError: Cannot read properties of undefined


function renderList(items: string[]) {
  for (let i = 0; i < items.length; i++) {
    const item = items[i]; 
    // Warning: item is defined but never used
  }

  console.log("Rendering complete");
}


#include <iostream>

int main() {
    bool isPassion = true
    bool passion = true;
    bool isTired = false
    bool tired = false;

    while (passion) {
        if (tired) {
            recharge();
        } else {
            buildDreams();
            pushLimits();
        }
        reflect();
        learn(); 
    }

    std::cout << "return legacy;" << std::endl;
    return 0;
}


function getDiscount(price: number): number {
  if (price > 100) {
    return price * 0.9; 
  }

  return price;
}

const finalPrice = getDiscount(150);


"use client";
import React, { useRef } from "react";

export default function FocusInput() {
  const inputRef = useRef<HTMLInputElement>(null); 

  const handleFocusClick = () => {
    inputRef.current?.focus(); 
  };

  const handleFocus = () => {
    console.log("Input is focused!");
  };

  const handleBlur = () => {
    console.log("Input lost focus.");
  };

  return (
    <div className="p-4 space-y-4">
      <input
        ref={inputRef}
        onFocus={handleFocus}
        onBlur={handleBlur}
        type="text"
        placeholder="Click the button to focus me"
        className="border px-4 py-2 rounded focus:outline-none focus:ring-2 focus:ring-blue-400 transition-all"
      />

      <button
        onClick={handleFocusClick}
        className="bg-blue-600 text-white px-4 py-2 rounded hover:bg-blue-700 transition"
      >
        Focus Input
      </button>
    </div>
  );
}