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function sortScores(xs: Array<number>, highest: number): Array<number> {
const counts: Array<number> = [];
const result: Array<number> = [];
// Initialize counts
for (let i = 0; i <= highest; i += 1) {
counts.push(0);
}
for (let i = 0; i < xs.length; i += 1) {
counts[xs[i]] += 1
}
for (let i = highest; i >= 0; i -= 1) {
let count: number = counts[i];
for (let j = 0; j < count; j += 1) {
result.push(i);
}
}
return result;
}
// Tests
let desc = 'no scores';
let actual = sortScores([], 100);
let expected = [];
assertEqual(JSON.stringify(actual), JSON.stringify(expected), desc);
desc = 'one score';
actual = sortScores([55], 100);
expected = [55];
assertEqual(JSON.stringify(actual), JSON.stringify(expected), desc);
desc = 'two scores';
actual = sortScores([30, 60], 100);
expected = [60, 30];
assertEqual(JSON.stringify(actual), JSON.stringify(expected), desc);
desc = 'many scores';
actual = sortScores([37, 89, 41, 65, 91, 53], 100);
expected = [91, 89, 65, 53, 41, 37];
assertEqual(JSON.stringify(actual), JSON.stringify(expected), desc);
desc = 'repeated scores';
actual = sortScores([20, 10, 30, 30, 10, 20], 100);
expected = [30, 30, 20, 20, 10, 10];
assertEqual(JSON.stringify(actual), JSON.stringify(expected), desc);
function assertEqual(a, b, desc) {
if (a === b) {
console.log(`${desc} ... PASS`);
} else {
console.log(`${desc} ... FAIL: ${a} != ${b}`);
}
}
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