diff --git a/std.isbpl b/std.isbpl
index 0ae8eb4..6546c13 100644
--- a/std.isbpl
+++ b/std.isbpl
@@ -179,13 +179,13 @@ func _string {
         object itos =object
     }
     object isfloat if {
-        object ftoi =object
+        object ftos =object
     }
     object islong if {
-        object ltoi =object
+        object ltos =object
     }
     object isdouble if {
-        object dtoi =object
+        object dtos =object
     }
 
     object isarray if {
diff --git a/time.isbpl b/time.isbpl
index b50d6ee..76a2bf3 100644
--- a/time.isbpl
+++ b/time.isbpl
@@ -23,21 +23,24 @@ construct Timer {
     timeTakenTMP
     ;
     start {
-        getms =startMS
-        null =timeTakenTMP
+        with this ;
+        getms this =startMS
+        null this =timeTakenTMP
     }
-    stop {
-        getms =stopMS
-        null =timeTakenTMP
+    end {
+        with this ;
+        getms this =stopMS
+        null this =timeTakenTMP
     }
     timeTaken {
-        timeTakenTMP if {
-            timeTakenTMP 2 stop
+        with this ;
+        this timeTakenTMP null eq not if {
+            this timeTakenTMP 2 stop
         }
-        startMS stopMS eq if {
-            0 dup =timeTakenTMP
+        this startMS this stopMS eq if {
+            0 dup this =timeTakenTMP
             2 stop
         }
-        stopMS startMS - dup =timeTakenTMP
+        this stopMS this startMS - dup this =timeTakenTMP
     }
 } =Timer