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String Classhelper
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| unit StringHelper; | |
| interface | |
| type | |
| TStringHelper = record helper for string | |
| function OnlyNumbers :String; | |
| end; | |
| implementation | |
| function TStringHelper.OnlyNumbers: String; | |
| var | |
| I :Byte; | |
| begin | |
| for I := 1 To Length(Self) do | |
| if Self[I] In ['0'..'9'] Then | |
| Result := Result + Self[I]; | |
| end; | |
| end. |
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