| Description |
Returns the index of the last occurence of any of the set of character Values in the current string.
If not found, then -1 is returned.
The scan is case sensitive.
The scan starts at the end and continues until either the Needle is found, or the string start is passed.
The scan can be forced to commence from the Start character backwards, and can be limited to Count scan characters.
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| | Notes | Very Important : Methods in .Net treat strings as starting at 0, unlike traditional Delphi where they started at 1.
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| Microsoft MSDN Links |
system
system.String
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| A simple example |
program Project1;
{$APPTYPE CONSOLE}
var
strA : String;
strArray : Array[1..3] of Char;
result : Integer;
begin
strA := 'Hello World';
Console.WriteLine('Guide= 1111111111');
Console.WriteLine(' 01234567890123456789');
Console.WriteLine('strA = ' + strA);
strArray[1] := 'h'; // Not in the string
strArray[2] := 'o'; // In positions 4 and 7 of the string
strArray[3] := 'w'; // In position 11 of the string
result := strA.LastIndexOfAny(strArray);
Console.WriteLine('Looking for h,o,w');
Console.WriteLine('Result = ' + result.ToString);
Console.ReadLine;
end.
| | Show full unit code | Guide= 1111111111
01234567890123456789
strA = Hello World
Looking for h,o,w
Result = 7
| | | Specifying a start position | program Project1;
{$APPTYPE CONSOLE}
var
strA : String;
strArray : Array[1..3] of Char;
result : Integer;
begin
strA := 'Hello World';
Console.WriteLine('Guide= 1111111111');
Console.WriteLine(' 01234567890123456789');
Console.WriteLine('strA = ' + strA);
strArray[1] := 'h'; // Not in the string
strArray[2] := 'o'; // In positions 4 and 7 of the string
strArray[3] := 'd'; // In position 11 of the string
result := strA.LastIndexOfAny(strArray, 10);
Console.WriteLine('Looking for h,o,d, starting @ 10 moving backwards');
Console.WriteLine('Result = ' + result.ToString);
result := strA.LastIndexOfAny(strArray, 6);
Console.WriteLine('Looking for h,o,d, starting @ 6 moving backwards');
Console.WriteLine('Result = ' + result.ToString);
result := strA.LastIndexOfAny(strArray, 3);
Console.WriteLine('Looking for h,o,d, starting @ 3 moving backwards');
Console.WriteLine('Result = ' + result.ToString);
Console.ReadLine;
end.
| | Show full unit code | Guide= 1111111111
01234567890123456789
strA = Hello World
Looking for h,o,d, starting @ 10 moving backwards
Result = 10
Looking for h,o,d, starting @ 6 moving backwards
Result = 4
Looking for h,o,d, starting @ 3 moving backwards
Result = -1
| | | Specifying a start position and limit in the character scan | program Project1;
{$APPTYPE CONSOLE}
var
strA : String;
strArray : Array[1..3] of Char;
result : Integer;
begin
strA := 'Hello World';
Console.WriteLine('Guide= 1111111111');
Console.WriteLine(' 01234567890123456789');
Console.WriteLine('strA = ' + strA);
strArray[1] := 'h'; // Not in the string
strArray[2] := 'o'; // In positions 4 and 7 of the string
strArray[3] := 'd'; // In position 11 of the string
result := strA.LastIndexOfAny(strArray, 10, 2);
Console.WriteLine('Looking for h,o,d, starting @ 10 back for 2 chars');
Console.WriteLine('Result = ' + result.ToString);
result := strA.LastIndexOfAny(strArray, 6, 2);
Console.WriteLine('Looking for h,o,d, starting @ 6 back for 2 chars');
Console.WriteLine('Result = ' + result.ToString);
result := strA.LastIndexOfAny(strArray, 3, 2);
Console.WriteLine('Looking for h,o,d, starting @ 3 back for 2 chars');
Console.WriteLine('Result = ' + result.ToString);
Console.ReadLine;
end.
| | Show full unit code | Guide= 1111111111
01234567890123456789
strA = Hello World
Looking for h,o,d, starting @ 10 back for 2 chars
Result = 10
Looking for h,o,d, starting @ 6 back for 2 chars
Result = -1
Looking for h,o,d, starting @ 3 back for 2 chars
Result = -1
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