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Delphi source code for Strings >> Extract numbers from a string


Category: Strings
Title: Extract numbers from a string
Date added: 15.03.2006
Hits: 16175


type
  TCharSet = set of Char;

function StripNonConforming(const S: string;
  const ValidChars: TCharSet): string;
var
  DestI: Integer;
  SourceI: Integer;
begin
  SetLength(Result, Length(S));
  DestI := 0;
  for SourceI := 1 to Length(S) do
    if S[SourceI] in ValidChars then
    begin
      Inc(DestI);
      Result[DestI] := S[SourceI]
    end;
  SetLength(Result, DestI)
end;

function StripNonNumeric(const S: string): string;
begin
  Result := StripNonConforming(S, ['0'..'9'])
end;

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