matlab - 在 Matlab 中，如何按元素比较两个 container.Map 对象？

Question

我有两个 container.Map 对象，具有相同的键和值。是否有一个 Matlab 函数，它将在以下场景中返回 true：

>> m1 = containers.Map('hi', 'ho');
>> m2 = containers.Map('hi', 'ho');
>> m1 == m2

ans =

     0

Answer 1

该类containers.Map继承自句柄类，这意味着==运算符仅在以下情况下返回 true：

m1 = containers.Map('hi', 'ho');
m2 = m1;
m2 == m1

句柄的行为就像一个指针（在某种程度上！）。

如果要比较两个不同的地图，则需要循环它们的元素并一一比较。例如：

keys1 = m1.keys;
keys2 = m2.keys;

% // If the keys are not equal there is no reason to loop
if ~isequal(keys1, keys2)
    disp('Maps are not equal');
    return;
end

% // Since at this point it is known that keys1 == keys2, keys1 is used as a
% // base
results = false(size(keys1));
for i = 1:length(keys1)
    results(i) = ms1(keys{i}) == ms2(keys{i});
end

if all(results)
    disp(';aps are equal');
else
    disp('Maps are not equal');
end

Answer 2

isequal你的朋友在这里吗...

从帮助isequal

When comparing handle objects, use EQ or the == operator to test
whether objects are the same handle. Use isequal to test if objects
have equal property values, even if those objects are different
handles.

正如@gire 所提到的，containers.Map它与handle课程相关联

所以用给出的简单地图

isequal(m1,m2)

ans =

     1