Immutable maps Implemented by using a list-based data structure. The Scala List class holds a sequenced, linear list of items. We must import
scala.collection.mutable.ListMap for ListMap. ListMap collection used only for a small number of elements.
var listMapName = ListMap("k1"->"v1", "k2"->"v2", "k3"->"v3", ...)
Here, k is key and v is value.
Operaion performed by ListMap
Creating an ListMap:
In below code we can see a ListMap is created with values.
Map(C -> Csharp, S -> Scala, J -> Java)
Adding and accessing elements :
A ListMap is created, add elements and access elements also performed.
J -> Java C -> Csharp S -> Scala Scala P -> Perl C -> Csharp J -> Java S -> Scala
Removing an element from ListMap :
A ListMap is created than removing an element is performed using – sign. Below is the example to removing an element from ListMap.
J -> Java C -> Csharp S -> Scala After Removing J -> Java S -> Scala
Creating an empty ListMap:
An empty ListMap is created either by calling its constructor or using ListMap.empty method.