Each entry in a Map consists of two parts: a unique key and
its corresponding value. To find all the keys in a Map, use the keys method.
To find all of the values, use the values method.
Create a new Map called ticketMap that maps
airline ticket numbers to the holders of those tickets. Construct
the Map with four key/value pairs:
ticketMap = containers.Map(...
{'2R175', 'B7398', 'A479GY', 'NZ1452'}, ...
{'James Enright', 'Carl Haynes', 'Sarah Latham', ...
'Bradley Reid'});
Use the keys method to display all keys
in the Map. MATLAB® lists keys of type char in
alphabetical order, and keys of any numeric type in numerical order:
keys(ticketMap)
ans =
'2R175' 'A479GY' 'B7398' 'NZ1452'Next, display the values that are associated with those keys in the Map. The order of the values is determined by the order of the keys associated with them.
This table shows the keys listed in alphabetical order:
| keys | values |
|---|---|
2R175 | James Enright |
A479GY | Sarah Latham |
B7398 | Carl Haynes |
NZ1452 | Bradley Reid |
The values method uses the same ordering
of values:
values(ticketMap)
ans =
'James Enright' 'Sarah Latham' 'Carl Haynes' 'Bradley Reid'containers.Map | isKey | keys | length | remove | size | values