Function intersperse

src/utils.ts:11–12

(values: readonly T[], separator: T)

}

export const intersperse = <T>(values: readonly T[], separator: T): T[] =>
    values.flatMap((value, index) => (index === 0 ? [value] : [separator, value]));

export const union = <T>(...values: Array<Iterable<T>>): T[] => [...new Set(...values)];