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Jeremy Vyska 2022-02-20 13:18:49 +01:00
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59
content/NAVPatterns/3-cal-coding-guidelines/design/variable-capacity-mismatch/index.md
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+++
title = "Variable Capacity Mismatch"
weight = 1410
+++
Do not assign a value to a variable whose capacity is smaller.
It will throw an error at runtime.
Bad code
FileName@1010 : Text[250];
...
UploadedFileName@1016 : Text[1024];
...
FileName := UploadedFileName;
Good code
FileName@1010 : Text[1024];
...
UploadedFileName@1016 : Text[1024];
...
FileName := UploadedFileName;
Bad code
FileName@1010 : Text[250];
...
UploadedFileName@1016 : Text[1024];
...
FileName := UploadedFileName;
Good code
FileName@1010 : Text[250];
...
UploadedFileName@1016 : Text[1024];
...
FileName := COPYSTR(UploadedFileName,1,250); // In case only the first 250 chars are needed. Similar for fields
Bad code
VAR
ExceededNumberTxt@001 : 'ENU=Warning: Exceeded number of unsent documents/requests'
Subject@1002 : Text[50];
...
BEGIN
...
Subject := ExceededNumberTxt;
Good code
VAR
ExceededNumberTxt@001 : 'ENU=Warning: Exceeded number of unsent documents/requests'
Subject@1002 : Text[100];
...
BEGIN
...
Subject := ExceededNumberTxt';