jsmodern/dist/set/intersection.js

An extension to existing JavaScript, influenced by other great languages such as Rust, Dart, Java, Golang, etc.

import { utilIsSet } from './is-set';
export const intersection = {
    label: 'intersection',
    fn: function setIntersection(other) {
        const ctx = this;
        if (!utilIsSet(other))
            throw new TypeError(`Expect 'other' to be a Set`);
        if (!ctx.size && !other.size)
            return [];
        const intersectionList = [];
        for (const n of ctx)
            if (other.has(n))
                intersectionList.push(n);
        return intersectionList;
    },
};
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