Strings

Beginner tip:

Scala has a built-in implicit conversion from java.lang.String to scala.runtime.RichString. Here are some things you can try:

1. scala> val s = "hi"
2. s: java.lang.String = hi
4. scala> s.length 
5. res0: Int = 2
7. scala> s(1)
8. res1: Char = i
10. scala> s(0)
11. res2: Char = h
13. scala> s.r 
14. res3: scala.util.matching.Regex = hi
16. scala> s.drop(1)
17. res4: scala.runtime.RichString = i
19. scala> s.take(1)
20. res5: scala.runtime.RichString = h
22. scala> val longString = """
23.      | second line
24.      | third line
25.      | """
26. longString: java.lang.String = 
28.        second line
29.        third line
30.        
32. scala> longString.lines
33. res6: Iterator[String] = non-empty iterator
35. scala> longString.lines.toList
36. res7: List[String] = List(,        second line,        third line,        )
38. scala> longString.lines.map( _.length )
39. res8: Iterator[Int] = non-empty iterator