This is the first of three lessons on the Scala String data type.
Strings are:
- Enclosed in double-quotes
- Enclosed in triple-quotes (multiline strings)
- Immutable
- A
Stringcan also be treated as aSeq[Char]
val x = "Alvin"Multiline string:
val x = """
Alvin
123 Main Street
Talkeetna, AK 99676
""""Common String methods
val s = "big belly burger"
s.length
s.capitalize
s.toUpperCase
s.take(3)
s.drop(4)
s.startsWith("b")
s.endsWith("er")
s.distinct
s.intersect("big")Higher-order functions (HOFs)
A primary use of an HOF is that it’s a function that takes other functions as input parameters:
s.map(c => c.toUpper)
s.filter(c => !c.isSpaceChar)
s.dropWhile(c => c != 'e')String is also a Seq[Char]
s(0)
for c <- s do println(c)Many more methods!
See my blog post:
