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17 lines
538 B
TypeScript
17 lines
538 B
TypeScript
export function sampleSize(array: string[], n: number): string[] {
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const length = array == null ? 0 : array.length;
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if (!length || n < 1) {
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return [];
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}
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// eslint-disable-next-line no-param-reassign
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n = n > length ? length : n;
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let index = 0;
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const lastIndex = length - 1;
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const result = [...array];
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while (index < n) {
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const rand = index + Math.floor(Math.random() * (lastIndex - index + 1));
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[result[rand], result[index]] = [result[index], result[rand]];
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index += 1;
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}
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return result.slice(0, n);
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}
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