added a groupBy method (and stumbled on a couple more little compiler bugs which could well be the same as previous issues I've raised this week). Happy holidays everyone :)

2011-12-24 07:46:26 +00:00
parent 8396017b5b
commit 393ecf2208
2 changed files with 32 additions and 0 deletions
@@ -118,6 +118,24 @@ class CollectionTest() : TestSupport() {
    assertEquals(6, count)
  }

+  fun testGroupBy() {
+    val words = arrayList("a", "ab", "abc", "def", "abcd")
+    /*
+     TODO inference engine should not need this type info?
+     */
+    val byLength = words.groupBy<String,Int>{it.length}
+    assertEquals(4, byLength.size())
+
+    println("Grouped by length is: $byLength")
+    /*
+     TODO compiler bug...
+
+    val l3 = byLength.getOrElse(3, {ArrayList<String>()})
+    assertEquals(2, l3.size)
+    */
+
+  }
+
  fun testJoin() {
    val text = data.join("-", "<", ">")
    assertEquals("<foo-bar>", text)