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   ► KBTo/From GuidesDelphi  Print This     

Empty String Check (Delphi and C++ Cross Reference Guide)

By Mike Prestwood

Delphi versus C++: A side by side comparison between Delphi and C++.

 
Operators
 

A language symbol used for assignment, comparison, computational, or as a logical.

Empty String Check

[Other Languages] 

Languages Focus

An empty string is a zero length string, a string that is equal to null (""), or not assigned. In some languages, you can check if a string is empty by comparing it to an empty string (""). Some languages distinguish between nil and null ("") so checking if the length is 0 is easier.

Delphi:   length(s) = 0

Length() or SizeOf() will correctly identify an unassigned string variable or an empty string.

Syntax Example:
if length(s) = 0 then
  ShowMessage('empty string');
[Not specified yet. Coming...]













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