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authorrostdotio <rostdotio@paranoia.at>2014-02-28 10:31:10 +0100
committerrostdotio <rostdotio@paranoia.at>2014-02-28 10:31:10 +0100
commitbd6d3be775fd6be55f92d1d368b303f40618c0e1 (patch)
treee8d48ce48abe3c0b447ab6b50b8530c1abd6a2f4 /scala.html.markdown
parent31b542777449d6a2a8bbd66a0e1cf570ea82e335 (diff)
Added explanation for colon character
Use of the colon character for value assignment is now explained by example of function add10.
Diffstat (limited to 'scala.html.markdown')
-rw-r--r--scala.html.markdown5
1 files changed, 4 insertions, 1 deletions
diff --git a/scala.html.markdown b/scala.html.markdown
index 5dfaefe0..2666746e 100644
--- a/scala.html.markdown
+++ b/scala.html.markdown
@@ -104,10 +104,13 @@ val sq = (x:Int) => x * x
sq(10) // Gives you this: res33: Int = 100.
+// The colon explicitly defines the type of a value, in this case a function
+// taking an Int and returning an Int.
+val add10: Int => Int = _ + 10
+
// Scala allows methods and functions to return, or take as parameters, other
// functions or methods.
-val add10: Int => Int = _ + 10 // A function taking an Int and returning an Int
List(1, 2, 3) map add10 // List(11, 12, 13) - add10 is applied to each element
// Anonymous functions can be used instead of named functions: