When I checked the shuffle.c source code, I found several issues. The Motex library it belongs to has not been maintained for a decade and there is no longer a project site for it, so I'm not able to make a pull request with fixes. Instead, I wrote my own drop-in replacement from scratch: pd-shuffle.

I'm not sure what else to do besides posting it here. Advice welcome.

1. outputs a random series of integers, one for each bang
2. the series is initially empty -- there is no initial series of consecutive integers as with the [shuffle ] object
3. one or more integers can be added to the series between bangs
4. integers already in the series can be removed
5. the integers in the series need not be in a consecutive sequence
6. the series can be reset to its initial empty state

For convenience, the [purdie ] object can be loaded with a series of consecutive integers provided by another new object named [seq ], optionally with only one bang.

[qlist ] and [textfile ], which are built in to Pd Vanilla, already provide an interface with files, so the value of [lotus ] is in its simplicity and single focus: it only does one thing, an associative memory array with permanent storage.