Monday, November 08, 2010 at 12:04 AM.


on isMessageDeleted (msgNum, adrMsgTable=nil, pta=nil) {
	<<Has a discussion group message been deleted?
		<<Dg messages are never destroyed -- an flDeleted flag in the message table is set to true.
		<<This flag may not exist, so it's important to test for existence before checking whether or not it's true. (Let this script do it for you.)
			<<8/2/1999; 3:09:01 PM by PBS
				<<Added adrMsgTable and pta optional parameters, because often these addresses are known before calling this script. Performance improves if they don't have to be recomputed.
	if adrMsgTable == nil { //get the address of the message table
		if pta == nil { //get the address of the page table
			pta = html.getPageTableAddress ()};
		adrMsgTable = mainResponder.discuss.getMessageTable (msgNum, pta)};
	if not defined (adrMsgTable^.flDeleted) { //if the flDeleted flag isn't defined, the message hasn't been deleted: return false
		return (false)};
	return (adrMsgTable^.flDeleted)} //the flag exists, so return the value of the flag

This listing is for code that runs in the OPML Editor environment. I created these listings because I wanted the search engines to index it, so that when I want to look up something in my codebase I don't have to use the much slower search functionality in my object database. Dave Winer.