20 lines
421 B
JavaScript
20 lines
421 B
JavaScript
class Sets {
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static filterSet(set, predicate) {
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return new Set([...set].filter(predicate));
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}
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static union(sets) {
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return sets.reduce(
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(union, set) => new Set([...union, ...set]),
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new Set());
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}
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static intersection(set1, set2) {
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return new Set([...set1].filter(x => set2.has(x)));
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}
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static isEmpty(set) {
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return set.size == 0;
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}
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} |