[svn] r6363: nemerle/trunk/lib/hashtable.n

[VladD2]

Log:
1.Performance improvement of Hashtable.Get() method. 2. Has added alternative methods for get value.

Author: VladD2
Date: Sat Jun  3 04:15:15 2006
New Revision: 6363

Modified:
   nemerle/trunk/lib/hashtable.n

Modified: nemerle/trunk/lib/hashtable.n
==============================================================================
--- nemerle/trunk/lib/hashtable.n	(original)
+++ nemerle/trunk/lib/hashtable.n	Sat Jun  3 04:15:15 2006
@@ -97,12 +97,42 @@
      */
     public Get (key : 'a) : option ['b]
     {
-      if (ContainsKey (key))
-        Some (this [key])
+      mutable value;
+      
+      if (TryGetValue (key, out value))
+        Some (value)
       else
         None ()
     }
 
+    public TryGetValue (key : 'a) : 'b * bool
+    {
+      mutable value;
+      
+      if (TryGetValue (key, out value))
+        (value, true)
+      else
+        (Nemerle.Extensions.DefaultValue ('b), false)
+    }
+
+    public GetValueOrDefault (key : 'a) : 'b
+    {
+      mutable value;
+      
+      ignore (TryGetValue (key, out value));
+      
+      value
+    }    
+    
+    public GetValueOrDefault (key : 'a, defaultValue : 'b) : 'b
+    {
+      mutable value;
+      
+      if (TryGetValue (key, out value))
+        value
+      else
+        defaultValue
+    }
     
     /**
      * This is different from add, which can fail if the key is