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update Data Structures section to show outputs

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chris-hranj 2015-10-24 23:53:17 -04:00
parent 82deb66194
commit 069e127ff8
1 changed files with 12 additions and 11 deletions
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23
scala.html.markdown
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@ -278,21 +278,21 @@ val text = if (x == 10) "yeah" else "nope"
/////////////////////////////////////////////////
val a = Array(1, 2, 3, 5, 8, 13)
a(0)
a(3)
a(0) // Int = 1
a(3) // Int = 5
a(21) // Throws an exception
val m = Map("fork" -> "tenedor", "spoon" -> "cuchara", "knife" -> "cuchillo")
m("fork")
m("spoon")
m("fork") // java.lang.String = tenedor
m("spoon") // java.lang.String = cuchara
m("bottle") // Throws an exception
val safeM = m.withDefaultValue("no lo se")
safeM("bottle")
safeM("bottle") // java.lang.String = no lo se
val s = Set(1, 3, 7)
s(0)
s(1)
s(0) // Boolean = false
s(1) // Boolean = true
/* Look up the documentation of map here -
* http://www.scala-lang.org/api/current/index.html#scala.collection.immutable.Map
@ -313,15 +313,16 @@ s(1)
// Why have this?
val divideInts = (x: Int, y: Int) => (x / y, x % y)
divideInts(10, 3) // The function divideInts gives you the result and the remainder
// The function divideInts gives you the result and the remainder
divideInts(10, 3) // (Int, Int) = (3,1)
// To access the elements of a tuple, use _._n where n is the 1-based index of
// the element
val d = divideInts(10, 3)
val d = divideInts(10, 3) // (Int, Int) = (3,1)
d._1
d._1 // Int = 3
d._2
d._2 // Int = 1
/////////////////////////////////////////////////