Changeset 26

Timestamp:

10/12/08 14:44:00 (2 years ago)

Author:

Jonathan Jacobs <korpse@…>

Message:

Some utility functions.

Files:

• procyon/util.py (modified) (1 diff)

procyon/util.py

@@ -107 +107 @@
         yield delim
         yield x
+
+
+def maybe(value, f, default=None):
+    """
+    Maybe apply C{f} to C{value} otherwise return C{default}.
+
+    If C{value} is None then C{default} is returned, otherwise C{f} is applied
+    to C{value} and the result returned.
+
+    @type f: C{callable}
+    @param f: A callable that is passed one argument, C{value}, the result of
+        which is then returned
+    """
+    if value is None:
+        return default
+    return f(value)
+
+