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Michał Pierzchała
af6f12e391
* chore: adopt shared oxlint config * fix: preserve project lint boundaries * fix: remove redundant oxlint config
23 lines
704 B
TypeScript
23 lines
704 B
TypeScript
import type { Stat } from './types.ts';
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// Nearest-rank percentile over a copy of the values.
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function percentile(sorted: number[], p: number): number {
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if (sorted.length === 0) return Number.NaN;
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const rank = Math.ceil((p / 100) * sorted.length);
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const idx = Math.min(sorted.length - 1, Math.max(0, rank - 1));
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return sorted[idx];
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}
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export function summarize(values: number[]): Stat | null {
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const clean = values.filter((v) => Number.isFinite(v));
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if (clean.length === 0) return null;
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const sorted = [...clean].sort((a, b) => a - b);
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return {
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n: sorted.length,
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min: sorted[0],
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median: percentile(sorted, 50),
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p95: percentile(sorted, 95),
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max: sorted.at(-1),
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};
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}
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