Lists Demo

Author: CodeLab20

Collections/Lists.scala

@@ -0,0 +1,31 @@
+/**
+1. List is companion object
+2. List is Immutable object with duplicates allowed, access by index and searchable
+3. Nil is an empty list
+*/
+object Lists extends App
+{
+    //List Declaration
+    val a = List(1,2,3,4,5)
+    val a2 = List.apply(1,2,3,4,5)
+    val a3 = 1::2::3::4::5::Nil
+    
+    println("a.head = " + a.head)   //1. First Element
+    println("a.tail = " + a.tail)   //2,3,4,5   //All Elements other than first one
+    println("a.init = " + a.init)   // All Initial elements except last one
+    println("a.last = " + a.last)   //Last Element in list
+    
+    println("a(3) = " + a(3))       //4th element in list
+    println("a.apply(3) = " + a.apply(3))       //4th element in list
+    
+    println("a.max = " + a.max)
+    println("a.min = " + a.min)
+    println("a.isEmpty = " + a.isEmpty)
+    println("a.nonEmpty = " + a.nonEmpty)
+    
+    println("a.updated(3,10) = " + a.updated(3,10)) //replace 4th element with 10
+    
+    println("a.mkString(\",\") = " +  a.mkString(","))
+    println("a.mkString(\"**\") = " +  a.mkString("**"))
+    println("a.mkString(\"[\",\"**\", \"]\") = " +  a.mkString("[", "**", "]"))
+}