Search and replace

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'.

Source : http://www.chami.com/tips/delphi/010197D.html