Scala Collections Tutorial with Examples v4

Collections in Scala,
Lists + Set + Map and Tuples APIs in Scala Collections,
Scala Collection APIs vs Java Collections,
Mutable and Immutable Collections in Scala,
Option + Some + None collection types in scala,
Scala Collections Tutorial with Examples,
Sequences Collections Examples in Scala,
List and ListBuffer Operations in Scala,
Immutable Sets and Mutable Set Operations in Scala,
Immutable Map and Mutable Map Operations in Scala,
Tuple Types with Examples in Scala,
Option + Some + None collection types in Scala,
Iterator alternatives in Scala collections,
Map + Reduce + Foreach + Filter Operations on Collections in Scala