In MATLAB, you can check if a hash includes a key using the function called isKey(). The isKey() function takes two arguments: the first argument is the hash object, and the second argument is the key you want to check.
Here's an example:
% Define a hash with several key-value pairs
myHash = containers.Map();
myHash('John') = 25;
myHash('Mary') = 30;
myHash('Mike') = 35;
% Check if the hash includes the key 'Mary'
if isKey(myHash, 'Mary')
fprintf('The hash includes the key ''Mary''.\n')
else
fprintf('The hash does not include the key ''Mary''.\n')
end
% Check if the hash includes the key 'Alice'
if isKey(myHash, 'Alice')
fprintf('The hash includes the key ''Alice''.\n')
else
fprintf('The hash does not include the key ''Alice''.\n')
end
The output of this code will be:
The hash includes the key 'Mary'.
The hash does not include the key 'Alice'.
As you can see, the isKey() function returns true if the hash includes the key you are checking, and false otherwise.