Poker stats calculator

pokerStats.js

const tests = [
	[],
	[0],
	[0, 0],
	[0, 1, 2, 3, 5, 1, 2, 5, 8, 5, 1],
	[5, 5, 5, 5],
	[5, 5, 5, 8],
	[5, 5, 8, 8],
	[5, 5, 8, 13],
	[5, 8, 8, 8],
	[5, 8, 13, 8],
	[5, 8, 8],
	[5, 5, 8],
	[5, 8, 8, 1, 2, 3],
];

console.table(tests.map(pokerStats));

function pokerStats(selectedCards) {
	const numericCards = selectedCards.filter(card => card >= 0);
	const lowest = Math.min(...numericCards);
	const highest = Math.max(...numericCards);
	const distinct = [...new Set(numericCards)].sort((a, b) => b - a);
	const counts = distinct.map(
		card => numericCards.filter(_card => _card === card).length
	);
	const commonIndex = counts.findIndex(
		maxCount => maxCount === Math.max(...counts)
	);
	const consensus = distinct[commonIndex];
	const confidence = `${~~((counts[commonIndex] / numericCards.length) * 100)}%`;

	return {
		lowest,
		highest,
		consensus,
		confidence,
	};
}

Renamed some properties to align with project.