jsii/lib/sets.js

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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.Sets = void 0;
class Sets {
    /**
     * Return the intersection of N sets
     */
    static intersection(...xss) {
        if (xss.length === 0) {
            return new Set();
        }
        const ret = new Set(xss[0]);
        for (const x of xss[0]) {
            if (!xss.every((xs) => xs.has(x))) {
                ret.delete(x);
            }
        }
        return ret;
    }
    /**
     * Return the union of N sets
     */
    static union(...xss) {
        return new Set(xss.flatMap((xs) => Array.from(xs)));
    }
    /**
     * Return the diff of 2 sets
     */
    static diff(xs, ys) {
        return new Set(Array.from(xs).filter((x) => !ys.has(x)));
    }
    static *intersect(xs, ys) {
        for (const x of xs) {
            if (ys.has(x)) {
                yield x;
            }
        }
    }
}
exports.Sets = Sets;
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