The title says it all

Oh god, have I let the cat out of the bag (pun definitely intended) with this one?

Cheers,
Joe

lol, that's not very helpful

I know the right inlet expects a float...

The helpfile shows lists of two numbers going into the left inlet. This is common to most (maybe all?) Pd objects that have more than one inlet: instead of sending separate values to each inlet, you can combine them in a list and send them all to the first inlet. So in the case of [bag], the first inlet is the value and the second is the flag.

You would think so but that's not the case (geddit?).

But in all seriousness,

Putting a single value into each inlet ends up with the left inlet's value's flag set to nothing, not even 0. Actually this must be a bug, if you only send a value to the left inlet then flush does nothing. However, if you change the right value and then the left - flushing the object outputs all values sent to the left with no flag.

This object is seriously broken in my eyes, unless someone can show how it can be implemented in a helpful way (i.e. non-hacky).

I guess that's why it's not included in the default help patch that shows all the objects available.