From d296d64027626b77bf33cc2a0c01fa40891048f6 Mon Sep 17 00:00:00 2001
From: Alexander Udalov <Alexander.Udalov@jetbrains.com>
Date: Mon, 4 Jun 2012 17:41:28 +0400
Subject: [PATCH] File.listFiles(filter)

---
 libraries/stdlib/src/kotlin/io/Files.kt | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/libraries/stdlib/src/kotlin/io/Files.kt b/libraries/stdlib/src/kotlin/io/Files.kt
index 52b24387fab..8b46f8ccf76 100644
--- a/libraries/stdlib/src/kotlin/io/Files.kt
+++ b/libraries/stdlib/src/kotlin/io/Files.kt
@@ -202,3 +202,12 @@ fun File.readLines(charset : String = "UTF-8") : List<String> {
 
     return rs
 }
+
+/**
+ * Returns an array of files and directories in the directory that satisfy the specified filter.
+ */
+fun File.listFiles(filter : (file : File) -> Boolean) : Array<File>? = listFiles(
+    object : FileFilter {
+        override fun accept(file: File?) = filter(file!!)
+    }
+) as Array<File>?