real-world.js
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real-world.js
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	import { printTable } from '../formatter.js';

	import Ajv from 'ajv';
	import Handlebars from 'handlebars';
	import { format, addDays, differenceInDays, formatDistance } from 'date-fns';

	const now = new Date('2026-02-27T12:00:00Z');
	const later = addDays(now, 10);
	const formatted = format(now, 'yyyy-MM-dd');
	const distance = formatDistance(now, later);
	const daysDiff = differenceInDays(later, now);

	const ajv = new Ajv();
	const schema = {
	type: 'object',
	properties: {
	name: { type: 'string' },
	age: { type: 'integer', minimum: 0 }
	},
	required: ['name', 'age']
	};

	const validate = ajv.compile(schema);
	const valid = validate({ name: 'alice', age: 30 });
	const invalid = validate({ name: 'bob', age: -1 });

	const template = Handlebars.compile('Hello {{name}}, you have {{count}} messages');
	const rendered = template({ name: 'Alice', count: 5 });

	const rows = [
	['Real world tools', 'output'],
	['date-fns format', formatted],
	['date-fns addDays', format(later, 'yyyy-MM-dd')],
	['date-fns distance', distance],
	['date-fns diffDays', daysDiff],
	['ajv valid', valid],
	['ajv invalid', `${invalid} — ${validate.errors?.[0]?.message}`],
	['handlebars', rendered]
	];

	printTable(rows);