May 14, 2021 Groovy
Maps (also known as associated arrays, dictionaries, tables, and hash) are out-of-order collections of object references. ue. he keys used in Map can be any class. W hen we insert into the Map collection, we need two values: the key and the value.
Here are some examples of mapping -
'TopicName': 'Lists', 'TopicName': 'Maps' - A collection of key value pairs with TopicName as a key and its corresponding values.
- Empty mapping.
In this chapter, we'll discuss the mapping methods available in Groovy.
| Serial number | Method and description |
|---|---|
| 1 |
containsKey()
Does this map contain this key? |
| 2 |
get()
Look for the keys in this Map and return the appropriate value. I f there are no key entries in this map, null is returned. |
| 3 |
keySet()
Gets a set of keys in this map. |
| 4 |
put()
Associate the specified value with the specified key in this map. If this map previously contained a map of this key, the old value is replaced with the specified value. |
| 5 |
size()
Returns the number of key value maps in this map. |
| 6 |
values()
Returns a collection view of the values contained in this map. |