32 lines
888 B
TypeScript
32 lines
888 B
TypeScript
const random = () => Math.random();
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const randFromArray = (array: unknown[]) => array[Math.floor(random() * array.length)];
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const randIntFromInterval = (min: number, max: number) => Math.floor(random() * (max - min) + min);
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// Durstenfeld shuffle
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function shuffleArrayMutate<T>(array: T[]): T[] {
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for (let i = array.length - 1; i > 0; i--) {
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const j = Math.floor(Math.random() * (i + 1));
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[array[i], array[j]] = [array[j], array[i]];
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}
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return array;
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}
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const shuffleArray = <T>(array: T[]): T[] => shuffleArrayMutate([...array]);
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const shuffleString = (str: string, delimiter = ''): string => shuffleArrayMutate(str.split(delimiter)).join(delimiter);
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const generateRandomId = () => `id-${random().toString(36).substring(2, 12)}`;
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export {
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randFromArray,
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randIntFromInterval,
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random,
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shuffleArray,
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shuffleArrayMutate,
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shuffleString,
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generateRandomId,
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};
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