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T O P I C    R E V I E W
illysam Posted - 02/23/2004 : 10:41:45 AM
I have a string of the following format:

token1 token2 token3 token4 ...

What's the best way to delete a single token from that string? The problem is that only the token text is known while the position of the token is variable.

Thanks, Rolf.
3   L A T E S T    R E P L I E S    (Newest First)
Hideo Fujii Posted - 02/25/2004 : 10:34:46 AM
Hi Rolf.

You can also use a simple substring notation:
%[%A," token"] %[%A,>"token "],

e.g.,
  %a="abc bcd cde";
  type %[%A," bcd"] %[%A,>"bcd "];
  abc cde

Though it seems that this works only when the search token is a literal.

Hiedo Fujii
  OriginLab
rlewis Posted - 02/23/2004 : 12:05:06 PM
If you have Origin 7.0 or higher you can also try the OriginC option. The following (or something like it) should work

 
bool delete_token (string &InputString, string TokenString)
{
/*
  Deletes the string "TokenString" from the string "InputString"
*/
	string LocalCopy="";
	int i=0;
	while (i<InputString.GetNumTokens())
	{
		string strToken=InputString.GetToken(i);
		if (strToken.Compare(TokenString)!=0)
		{
			LocalCopy+=strToken;
			LocalCopy+=" ";
		}
		i++;
	}
		InputString=LocalCopy;	
	return (true);
}
Mike Buess Posted - 02/23/2004 : 11:45:01 AM
Hi Rolf,

One way is to examine each token like this...
%R=string;
%S=token_to_delete;
%T="";
for(i=1; i>0; i++) {
%A=%[%R,#i];
if( %A=="" ) break;
if( "%A"!="%S" ) %T=%T %A;
};

...There is a shorter way to do it but I can't to get the expression to appear in a forum message. Email me if you're interested.

Mike Buess
Origin WebRing Member

Edited by - Mike Buess on 02/23/2004 11:47:01 AM

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