Method count

src/fl/stl/unordered_set.h:116–118

Count - returns 0 or 1 for sets

    
    // Count - returns 0 or 1 for sets
    fl::size count(const Key &key) const {
        return has(key) ? 1 : 0;
    }

    // Erase operations
    bool erase(const Key &key) {