init

src/test/scala/org/functionalkoans/forscala/AboutPartiallyAppliedFunctions.scala

@@ -0,0 +1,22 @@
+package org.functionalkoans.forscala
+
+import support.KoanSuite
+import org.scalatest.matchers.ShouldMatchers
+
+class AboutPartiallyAppliedFunctions extends KoanSuite with ShouldMatchers {
+  koan("""A partially applied function is a function that you do not apply any or all the
+         | arguments, creating another function. This partially applied function
+         | doesn't apply any arguments""") {
+    def sum(a: Int, b: Int, c: Int) = a + b + c
+    val sum3 = sum _
+    sum3(1, 9, 7) should be(17)
+    sum(4, 5, 6) should be(15)
+  }
+
+  koan("""Partially applied functions can replace any number of arguments""") {
+    def sum(a: Int, b: Int, c: Int) = a + b + c
+    val sumC = sum(1, 10, _: Int)
+    sumC(4) should be(15)
+    sum(4, 5, 6) should be(15)
+  }
+}