scala> // basics
scala> 3+4
res0: Int = 7
scala> def gcd(x: Int, y: Int): Int = {
if (x == 0) y
else if (y == 0) x
else gcd(y%x, x)
}
gcd: (x: Int, y: Int)Int
scala> val five = gcd(15,35)
five: Int = 5
scala> var x = 1
x: Int = 1
scala> x = 2
x: Int = 2
scala> val three = x+1
three: Int = 3
scala> type anotherint = Int
defined type alias anotherint
scala> val four: anotherint = 4
four: anotherint = 4
scala> val bogus: anotherint = "hello"
<console>:12: error: type mismatch;
found : String("hello")
required: anotherint
(which expands to) Int
val bogus: anotherint = "hello"
^
scala> trait PointlessTrait
defined trait PointlessTrait
scala> val (x,y) = (2,3)
x: Int = 2
y: Int = 3
scala> println("hello")
hello
scala>
scala> // ticket #1513
scala> val t1513 = Array(null)
t1513: Array[Null] = Array(null)
scala> // ambiguous toString problem from #547
scala> val atom = new scala.xml.Atom(())
atom: scala.xml.Atom[Unit] = ()
scala> // overriding toString problem from #1404
scala> class S(override val toString : String)
defined class S
scala> val fish = new S("fish")
fish: S = fish
scala> // Test that arrays pretty print nicely.
scala> val arr = Array("What's", "up", "doc?")
arr: Array[String] = Array(What's, up, doc?)
scala> // Test that arrays pretty print nicely, even when we give them type Any
scala> val arrInt : Any = Array(1,2,3)
arrInt: Any = Array(1, 2, 3)
scala> // Test that nested arrays are pretty-printed correctly
scala> val arrArrInt : Any = Array(Array(1, 2), Array(3, 4))
arrArrInt: Any = Array(Array(1, 2), Array(3, 4))
scala>
scala> // implicit conversions
scala> case class Foo(n: Int)
defined class Foo
scala> case class Bar(n: Int)
defined class Bar
scala> implicit def foo2bar(foo: Foo) = Bar(foo.n)
warning: there was one feature warning; re-run with -feature for details
foo2bar: (foo: Foo)Bar
scala> val bar: Bar = Foo(3)
bar: Bar = Bar(3)
scala>
scala> // importing from a previous result
scala> import bar._
import bar._
scala> val m = n
m: Int = 3
scala>
scala> // stressing the imports mechanism
scala> val one = 1
one: Int = 1
scala> val one = 1
one: Int = 1
scala> val one = 1
one: Int = 1
scala> val one = 1
one: Int = 1
scala> val one = 1
one: Int = 1
scala> val one = 1
one: Int = 1
scala> val one = 1
one: Int = 1
scala> val one = 1
one: Int = 1
scala> val one = 1
one: Int = 1
scala> val one = 1
one: Int = 1
scala> val one = 1
one: Int = 1
scala> val one = 1
one: Int = 1
scala> val one = 1
one: Int = 1
scala> val one = 1
one: Int = 1
scala> val one = 1
one: Int = 1
scala> val one = 1
one: Int = 1
scala> val one = 1
one: Int = 1
scala> val one = 1
one: Int = 1
scala> val one = 1
one: Int = 1
scala> val one = 1
one: Int = 1
scala>
scala>
scala> val x1 = 1
x1: Int = 1
scala> val x2 = 1
x2: Int = 1
scala> val x3 = 1
x3: Int = 1
scala> val x4 = 1
x4: Int = 1
scala> val x5 = 1
x5: Int = 1
scala> val x6 = 1
x6: Int = 1
scala> val x7 = 1
x7: Int = 1
scala> val x8 = 1
x8: Int = 1
scala> val x9 = 1
x9: Int = 1
scala> val x10 = 1
x10: Int = 1
scala> val x11 = 1
x11: Int = 1
scala> val x12 = 1
x12: Int = 1
scala> val x13 = 1
x13: Int = 1
scala> val x14 = 1
x14: Int = 1
scala> val x15 = 1
x15: Int = 1
scala> val x16 = 1
x16: Int = 1
scala> val x17 = 1
x17: Int = 1
scala> val x18 = 1
x18: Int = 1
scala> val x19 = 1
x19: Int = 1
scala> val x20 = 1
x20: Int = 1
scala>
scala> val two = one + x5
two: Int = 2
scala>
scala> // handling generic wildcard arrays (#2386)
scala> // It's put here because type feedback is an important part of it.
scala> val xs: Array[_] = Array(1, 2)
xs: Array[_] = Array(1, 2)
scala> xs.size
res2: Int = 2
scala> xs.head
res3: Any = 1
scala> xs filter (_ == 2)
res4: Array[_] = Array(2)
scala> xs map (_ => "abc")
res5: Array[String] = Array(abc, abc)
scala> xs map (x => x)
res6: Array[_] = Array(1, 2)
scala> xs map (x => (x, x))
warning: there was one feature warning; re-run with -feature for details
res7: Array[(_$1, _$1)] forSome { type _$1 } = Array((1,1), (2,2))
scala>
scala> // interior syntax errors should *not* go into multi-line input mode.
scala> // both of the following should abort immediately:
scala> def x => y => z
<console>:1: error: '=' expected but '=>' found.
def x => y => z
^
scala> [1,2,3]
<console>:1: error: illegal start of definition
[1,2,3]
^
scala>
scala>
scala> // multi-line XML
scala> <a>
<b
c="c"
d="dd"
/></a>
res8: scala.xml.Elem =
<a>
<b c="c" d="dd"/></a>
scala>
scala>
scala> /*
/*
multi-line comment
*/
*/
You typed two blank lines. Starting a new command.
scala> // multi-line string
scala> """
hello
there
"""
res12: String =
"
hello
there
"
scala>
scala> (1 + // give up early by typing two blank lines
You typed two blank lines. Starting a new command.
scala> // defining and using quoted names should work (ticket #323)
scala> def `match` = 1
match: Int
scala> val x = `match`
x: Int = 1
scala>
scala> // multiple classes defined on one line
scala> sealed class Exp; class Fact extends Exp; class Term extends Exp
defined class Exp
defined class Fact
defined class Term
scala> def f(e: Exp) = e match { // non-exhaustive warning here
case _:Fact => 3
}
<console>:18: warning: match may not be exhaustive.
It would fail on the following inputs: Exp(), Term()
def f(e: Exp) = e match { // non-exhaustive warning here
^
f: (e: Exp)Int
scala> :quit
plusOne: (x: Int)Int
res0: Int = 6
res0: String = after reset
<console>:12: error: not found: value plusOne
plusOne(5) // should be undefined now
^
