文件操作 - IterableHelpers.js
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文件: /usr/share/nodejs/webpack/lib/util/IterableHelpers.js
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/* MIT License http://www.opensource.org/licenses/mit-license.php Author Tobias Koppers @sokra */ "use strict"; /** * @template T * @param {Iterable<T>} set a set * @returns {T | undefined} last item */ const last = set => { let last; for (const item of set) last = item; return last; }; /** * @template T * @param {Iterable<T>} iterable iterable * @param {function(T): boolean} filter predicate * @returns {boolean} true, if some items match the filter predicate */ const someInIterable = (iterable, filter) => { for (const item of iterable) { if (filter(item)) return true; } return false; }; /** * @template T * @param {Iterable<T>} iterable an iterable * @returns {number} count of items */ const countIterable = iterable => { let i = 0; // eslint-disable-next-line no-unused-vars for (const _ of iterable) i++; return i; }; exports.last = last; exports.someInIterable = someInIterable; exports.countIterable = countIterable;
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