From 1c0172be5ce88cf468b940008948c49eedc3eddc Mon Sep 17 00:00:00 2001
From: Maxim Kulkin <mkulkin@mirantis.com>
Date: Sun, 15 Sep 2013 17:45:25 +0400
Subject: [PATCH] Added index() helper function

---
 ostack_validator/common.py | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/ostack_validator/common.py b/ostack_validator/common.py
index d0d1c37..0d83350 100644
--- a/ostack_validator/common.py
+++ b/ostack_validator/common.py
@@ -3,6 +3,14 @@ def find(l, predicate):
   results = [x for x in l if predicate(x)]
   return results[0] if len(results) > 0 else None
 
+def index(l, predicate):
+  i = 0
+  while i<len(l):
+    if predicate(l[i]):
+      return i
+    i += 1
+  return -1
+
 class Mark(object):
   def __init__(self, source, line, column):
     self.source = source