Swift：按键引用数组元素(Swift: reference to array element by key)

 优雅的解决方案是提供与比较器运算符的intersect （例如，在C ++中 ）。 
 不幸的是，Matlab似乎并不支持这种功能/灵活性。 
 
 解决您的问题的方法是 
 
% convert structs into matrices
A = [[a(:).x];[a(:).y]]';
B = [[b(:).x];[b(:).y]]';
% intersect the equivalent representation
[C, ia, ib] = intersect( A, B, 'rows' );
% map back to original structs
c = a(ia);
 
 或者，您是否考虑使用从句柄类派生的类对象替换结构？ 有可能重载类的关系运算符 ，然后应该可以直接对类对象进行排序（我没有仔细研究过这个解决方案 - 这只是我头脑中的一个提议）。 

The elegant solution would have been to supply intersect with a comparator operator (like in , e.g., C++).
 Unfortunaetly, Matlab does not seem to support this kind of functionality/flexibility.
 
A workaround for your problem would be
 
% convert structs into matrices
A = [[a(:).x];[a(:).y]]';
B = [[b(:).x];[b(:).y]]';
% intersect the equivalent representation
[C, ia, ib] = intersect( A, B, 'rows' );
% map back to original structs
c = a(ia);
 
Alternatively, have you considered replacing your structs with class objects derived from handle class? It might be possible to overload the relational operators of the class and then it should be possible to sort the class objects directly (I haven't looked closely into this solution - it's just a proposal off the tip of my head).