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31 lines
592 B
31 lines
592 B
export const intersect = <A>(xs: Set<A>, ys: Set<A>): Set<A> => {
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const out: Set<A> = new Set()
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xs.forEach(x => {
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if (ys.has(x)) {
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out.add(x)
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}
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})
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return out
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}
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export const setEquals = <A>(xs: Set<A>, ys: Set<A>): boolean => {
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if (xs.size != ys.size) {
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return false
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}
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for (const x of Array.from(xs)) {
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if (!ys.has(x)) {
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return false
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}
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}
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return true
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}
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export const union = <A>(xs: Set<A>, ys: Set<A>): Set<A> =>
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new Set([
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...Array.from(xs),
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...Array.from(ys),
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])
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