4.1 KiB
4.1 KiB
title | id | localeTitle | challengeType |
---|---|---|---|
Date manipulation | 5966c21cf732a95f1b67dd28 | 5966c21cf732a95f1b67dd28 | 5 |
Description
Dada una cadena de fecha en EST, genera la fecha dada como una cadena con 12 horas agregadas a la hora.
La zona horaria debe ser preservada.
Ejemplo de entrada:
"March 7 2009 7:30pm EST"
Ejemplo de salida:
"March 8 2009 7:30am EST"
Instructions
Tests
tests:
- text: <code>add12Hours</code> es una función.
testString: 'assert(typeof add12Hours === "function", "<code>add12Hours</code> is a function.");'
- text: <code>add12Hours(dateString)</code> debe devolver una cadena.
testString: 'assert(typeof add12Hours(tests[0]) === "string", "<code>add12Hours(dateString)</code> should return a string.");'
- text: ' <code>add12Hours("" + tests[0] + "")</code> debe devolver <code>"" + answers[0] + ""</code> '
testString: 'assert(add12Hours(tests[0]) === answers[0], "<code>add12Hours("" + tests[0] + "")</code> should return <code>"" + answers[0] + ""</code>");'
- text: Debería cambiar el día. <code>add12Hours("" + tests[1] + "")</code> debe devolver <code>"" + answers[1] + ""</code> '
testString: 'assert(add12Hours(tests[1]) === answers[1], "Should handel day change. <code>add12Hours("" + tests[1] + "")</code> should return <code>"" + answers[1] + ""</code>");'
- text: 'Debe cambiar el mes en un año bisiesto. <code>add12Hours("" + tests[2] + "")</code> debe devolver <code>"" + answers[2] + ""</code> '
testString: 'assert(add12Hours(tests[2]) === answers[2], "Should handel month change in a leap years. <code>add12Hours("" + tests[2] + "")</code> should return <code>"" + answers[2] + ""</code>");'
- text: 'Debería cambiar el mes en un año común. <code>add12Hours("" + tests[3] + "")</code> debe devolver <code>"" + answers[3] + ""</code> '
testString: 'assert(add12Hours(tests[3]) === answers[3], "Should handel month change in a common years. <code>add12Hours("" + tests[3] + "")</code> should return <code>"" + answers[3] + ""</code>");'
- text: Debería cambiar de año. <code>add12Hours("" + tests[4] + "")</code> debe devolver <code>"" + answers[4] + ""</code> '
testString: 'assert(add12Hours(tests[4]) === answers[4], "Should handel year change. <code>add12Hours("" + tests[4] + "")</code> should return <code>"" + answers[4] + ""</code>");'
Challenge Seed
function add12Hours (dateString) {
// Good luck!
return true;
}
After Test
console.info('after the test');
Solution
function add12Hours (dateString) {
const months = ['January', 'February', 'March', 'April', 'May', 'June',
'July', 'August', 'September', 'October', 'November', 'December'];
// Get the parts of the string
const parts = dateString.split(' ');
const month = months.indexOf(parts[0]);
const day = parseInt(parts[1], 10);
const year = parseInt(parts[2], 10);
const time = parts[3].split(':');
let hours = parseInt(time[0], 10);
if (time[1].slice(-2) === 'pm') {
hours += 12;
}
const minutes = parseInt(time[1].slice(0, -2), 10);
// Create a date with given parts, and updated hours
const date = new Date();
date.setFullYear(year, month, day);
date.setHours(hours + 12); // Add 12 hours
date.setMinutes(minutes);
let hoursOutput = date.getHours();
let abbreviation = 'am';
if (hoursOutput > 12) {
hoursOutput -= 12;
abbreviation = 'pm';
}
return `${months[date.getMonth()]} ${date.getDate()} ${date.getFullYear()} ${hoursOutput}:${date.getMinutes()}${abbreviation} EST`;
}