Various Scala Examples

ScalaExamples.scala

// Find character with largest Unicode value
"Hello".reduceLeft((x, y) => if(x > y) x else y)

// Sum the unicode numeric value of the characters in "Hello World"
println("Hello World".foldLeft(0)((x, y) => x + y))

// Filter characters with even Unicode values
"Hello".filter(c => c % 2 == 0) // Filter characters with even Unicode values
"Hello".filter(_ % 2 == 0)

// Stream example
val s = Stream.from(1).takeWhile(_ > 0)
s.takeWhile(_ < 10).toList
s.takeWhile(_ < 10).mkString

// Prepend to a stream
val t = 0 #:: s
t.takeWhile(_ < 10).mkString

// Concatenating Lists
List(1, 2, 3) ++ List(4, 5, 6)
List(1, 2, 3) ::: List(4, 5, 6) // Possibly deprecated

// Example of zip function
List(1, 2, 3).zip(List(4, 5, 6))

// Examples of map function
(1 until 10).map(num => "file" + num)
(1 to 10).map { x => (x, x * x) }

// Convert List of tuples to Map
(1 to 10).map { x => (x, x * x) }.toMap