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Jeremy Vyska 2021-10-30 22:09:32 +02:00
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25
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;