unleash-server/dist/lib/util/findDuplicates.js

Unleash is an enterprise ready feature flag service. It provides different strategies for handling feature flags.

export const findDuplicates = (arr) => {
    const seen = new Set();
    const duplicates = new Set();
    for (const item of arr) {
        if (seen.has(item)) {
            duplicates.add(item);
        }
        else {
            seen.add(item);
        }
    }
    return [...duplicates];
};
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