Almost every text editor / word processor has the ability to search for a given string and replace it with another. If you're planning on adding similar functionality to your application, here's an example of where all of it can start:
function SearchAndReplace(
sSrc, sLookFor, sReplaceWith
: string )
: string;
var
nPos,
nLenLookFor : integer;
begin
nPos := Pos( sLookFor, sSrc );
nLenLookFor := Length( sLookFor );
while(nPos > 0)do
begin
Delete( sSrc, nPos, nLenLookFor );
Insert( sReplaceWith, sSrc, nPos );
nPos := Pos( sLookFor, sSrc );
end;
Result := sSrc;
end;
For example, let's say you have a string -- 'this,is,a,test' -- and you want to replace the commas with spaces. Here's how you'd call SearchAndReplace():
SearchAndReplace( 'this,is,a,test', ',', ' ' )
SearchAndReplace() will now return the string 'this is a test'.