First pass conversion of NAV Patterns

content/NAVPatterns/by-reference-parameters/index.md

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+title = "by-reference-parameters.md"
+weight = 280
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+Do not declare parameters by reference if their values are not intended to be changed.
+
+Unintentional value changes might propagate. Also, it might lead people to believe that value changes are intended. 
+
+Bad code
+
+    LOCAL PROCEDURE ShowMessage@15(VAR Text@1000 : Text\[250\]);
+    BEGIN
+    Text := GetMessageText;
+    IF (Text <\> '') AND GenJnlLineInserted THEN
+    MESSAGE(Text);
+    END;
+
+Good code
+
+    LOCAL PROCEDURE ShowMessage@15(Text@1000 : Text\[250\]);
+    BEGIN
+    Text := GetMessageText;
+    IF (Text <\> '') AND GenJnlLineInserted THEN
+    MESSAGE(Text);
+    END;