| | |
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| | | "use strict"; |
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| | | |
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| | | /** |
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| | | * Returns last item. |
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| | | * @template T |
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| | | * @param {Iterable<T>} set a set |
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| | | * @returns {T | undefined} last item |
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| | | */ |
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| | | const last = (set) => { |
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| | | /** @type {T | undefined} */ |
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| | | let last; |
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| | | for (const item of set) last = item; |
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| | | return last; |
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| | | }; |
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| | | |
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| | | /** |
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| | | * Returns true, if some items match the filter predicate. |
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| | | * @template T |
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| | | * @param {Iterable<T>} iterable iterable |
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| | | * @param {(value: T) => boolean | null | undefined} filter predicate |
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| | |
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| | | }; |
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| | | |
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| | | /** |
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| | | * Returns count of items. |
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| | | * @template T |
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| | | * @param {Iterable<T>} iterable an iterable |
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| | | * @returns {number} count of items |
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