diff options
Diffstat (limited to 'scala.html.markdown')
| -rw-r--r-- | scala.html.markdown | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/scala.html.markdown b/scala.html.markdown index b1b3ecbf..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: @@ -374,7 +377,7 @@ import scala.collection.immutable._ import scala.collection.immutable.{List, Map} // Rename an import using '=>' -import scala.collection.immutable{ List => ImmutableList } +import scala.collection.immutable.{ List => ImmutableList } // Import all classes, except some. The following excludes Map and Set: import scala.collection.immutable.{Map => _, Set => _, _} @@ -396,7 +399,7 @@ object Application { // To read a file line by line import scala.io.Source -for(line <- Source.fromPath("myfile.txt").getLines()) +for(line <- Source.fromFile("myfile.txt").getLines()) println(line) // To write a file use Java's PrintWriter |