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16 lines
514 B
TypeScript
16 lines
514 B
TypeScript
/**
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* Shuffle.
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*
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* Return a new array containing the shuffled elements of the given array.
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*
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* The algorithm used is not the most efficient, but is effectively a one-liner
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* whilst being reasonably efficient. To each element we assign a random key,
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* then we sort by this key. Since the key is random, the sorted array will have
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* the original elements in a random order.
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*/
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export const shuffle = <T>(xs: T[]) =>
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xs
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.map((x) => [Math.random(), x])
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.sort()
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.map(([, x]) => x);
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