| Description |
StrScan is used when you need to check a single character against a list of known characters (Characters).
If the SearchChar exists in Characters, then a pointer to the position in Characters is returned.
If it does not exist, a nil pointer is returned.
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| Related commands |
| AnsiPos |
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Find the position of one string in another |
| AnsiIndexStr |
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Compares a string with a list of strings - returns match index |
| AnsiMatchStr |
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Returns true if a string exactly matches one of a list of strings |
| LastDelimiter |
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Find the last position of selected characters in a string |
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| Example code : A simple example |
// Full Unit code.
// -----------------------------------------------------------
// You must store this code in a unit called Unit1 with a form
// called Form1 that has an OnCreate event called FormCreate.
unit Unit1;
interface
uses
SysUtils, // Unit containing the StrScan command
Forms, Dialogs;
type
TForm1 = class(TForm)
procedure FormCreate(Sender: TObject);
end;
var
Form1: TForm1;
implementation
{$R *.dfm} // Include form definitions
procedure TForm1.FormCreate(Sender: TObject);
const
Numbers = '0123456789';
begin
if StrScan(Numbers, '2') <> nil
then ShowMessage('2 is a numeric digit')
else ShowMessage('2 is not a numeric digit');
if StrScan(Numbers, 'A') <> nil
then ShowMessage('A is a numeric digit')
else ShowMessage('A is not a numeric digit');
end;
end.
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| Hide full unit code |
2 is a numeric digit
A is not a numeric digit
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