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Merged
anndreloopez012 merged 1 commit into from
Aug 5, 2026
Merged

Resolver ejercicio 66 intermedio #249

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21 changes: 21 additions & 0 deletions intermedio/ejercicios/66-cronometro-carreras/resoluciones/maria-montepeque/index.html
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<!doctype html>
<html lang="es">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Cronometro de vueltas</title>
<link rel="stylesheet" href="style.css">
</head>
<body>
<main class="cronometro">
<h1>Cronometro de vueltas</h1>
<div class="botones">
<button id="boton-iniciar">Iniciar</button>
<button id="boton-vuelta">Vuelta</button>
<button id="boton-reset">Reset</button>
</div>
<div id="historial-vueltas"></div>
</main>
<script src="maria-montepeque.js"></script>
</body>
</html>
122 changes: 122 additions & 0 deletions ...medio/ejercicios/66-cronometro-carreras/resoluciones/maria-montepeque/maria-montepeque.js
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// 66. Cronometro de vueltas - Resolucion Maria Montepeque

function esTimestampsValidos(timestamps) {
return (
Array.isArray(timestamps) &&
timestamps.length >= 2 &&
timestamps.every((valor) => typeof valor === 'number') &&
timestamps.every((valor, indice) => indice === 0 || valor > timestamps[indice - 1])
);
}

function calcularTiemposVuelta(timestamps) {
const tiempos = [];
for (let i = 1; i < timestamps.length; i += 1) {
tiempos.push(timestamps[i] - timestamps[i - 1]);
}
return tiempos;
}

function formatearTiempo(ms) {
const totalSegundos = ms / 1000;
const minutos = Math.floor(totalSegundos / 60);
const segundos = (totalSegundos % 60).toFixed(2);
return `${minutos}:${segundos.padStart(5, '0')}`;
}

function encontrarMejorVuelta(tiemposVuelta) {
if (tiemposVuelta.length === 0) return null;
const mejorMs = Math.min(...tiemposVuelta);
return { numeroVuelta: tiemposVuelta.indexOf(mejorMs) + 1, tiempoMs: mejorMs, tiempoFormateado: formatearTiempo(mejorMs) };
}

function generarHistorial(timestampsCronometro) {
if (!esTimestampsValidos(timestampsCronometro)) {
return { valido: false, motivo: 'se necesitan al menos 2 marcas de tiempo (inicio + 1 vuelta) en orden ascendente' };
}

const tiemposVuelta = calcularTiemposVuelta(timestampsCronometro);
const historial = tiemposVuelta.map((tiempoMs, indice) => ({
numeroVuelta: indice + 1,
tiempoMs,
tiempoFormateado: formatearTiempo(tiempoMs)
}));

const tiempoTotalMs = timestampsCronometro[timestampsCronometro.length - 1] - timestampsCronometro[0];

return {
valido: true,
totalVueltas: historial.length,
historial,
mejorVuelta: encontrarMejorVuelta(tiemposVuelta),
tiempoTotalMs,
tiempoTotalFormateado: formatearTiempo(tiempoTotalMs)
};
}

function renderizarHistorial(timestamps) {
if (typeof document === 'undefined') return;
const contenedor = document.querySelector('#historial-vueltas');
if (!contenedor) return;

const resultado = generarHistorial(timestamps);
contenedor.innerHTML = '';

if (!resultado.valido) {
contenedor.textContent = 'Presiona Iniciar y luego Vuelta para registrar tiempos.';
return;
}

resultado.historial.forEach((vuelta) => {
const fila = document.createElement('div');
const esMejor = resultado.mejorVuelta && vuelta.numeroVuelta === resultado.mejorVuelta.numeroVuelta;
fila.textContent = `Vuelta ${vuelta.numeroVuelta}: ${vuelta.tiempoFormateado}${esMejor ? ' (mejor)' : ''}`;
contenedor.appendChild(fila);
});
}

function inicializarCronometro() {
if (typeof document === 'undefined') return;

let timestamps = [];
const botonIniciar = document.querySelector('#boton-iniciar');
const botonVuelta = document.querySelector('#boton-vuelta');
const botonReset = document.querySelector('#boton-reset');

renderizarHistorial(timestamps);

if (botonIniciar) {
botonIniciar.addEventListener('click', () => {
timestamps = [Date.now()];
renderizarHistorial(timestamps);
});
}

if (botonVuelta) {
botonVuelta.addEventListener('click', () => {
if (timestamps.length === 0) return;
timestamps = [...timestamps, Date.now()];
renderizarHistorial(timestamps);
});
}

if (botonReset) {
botonReset.addEventListener('click', () => {
timestamps = [];
renderizarHistorial(timestamps);
});
}
}

const timestampsCarrera = [0, 61250, 121050, 181550];

console.log('Caso 1: carrera con 3 vueltas registradas (marcas de tiempo en ms)');
console.log(JSON.stringify(generarHistorial(timestampsCarrera), null, 2));

console.log('\nCaso 2: solo se presiono Iniciar, sin ninguna vuelta registrada aun');
console.log(JSON.stringify(generarHistorial([0]), null, 2));

console.log('\nCaso 2b: marcas de tiempo desordenadas (invalidas)');
console.log(JSON.stringify(generarHistorial([0, 5000, 3000]), null, 2));

inicializarCronometro();
44 changes: 44 additions & 0 deletions intermedio/ejercicios/66-cronometro-carreras/resoluciones/maria-montepeque/style.css
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body {
font-family: sans-serif;
background-color: #10131a;
color: #eef1f7;
display: flex;
justify-content: center;
padding: 2rem;
}

.cronometro {
width: min(400px, 100%);
text-align: center;
}

.botones {
display: flex;
gap: 0.5rem;
justify-content: center;
margin: 1rem 0;
}

.botones button {
padding: 0.6rem 1rem;
border-radius: 4px;
border: none;
background-color: #4c9aff;
color: #10131a;
cursor: pointer;
}

#historial-vueltas {
display: flex;
flex-direction: column;
gap: 0.35rem;
text-align: left;
}

#historial-vueltas div {
background-color: #1c2130;
border-left: 3px solid #4c9aff;
padding: 0.4rem 0.6rem;
border-radius: 4px;
font-size: 0.9rem;
}
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