[PD] object that blocks stream of numbers unless new values arrive?

[altern]

hi

is there a spigot type of object that blocks numbers from a stream
unless the value is different than the previos one that arrived?

i just want to avoid reinventing the wheel... i am using pd extended
right now so if any library there has something like this it would be
nice to know.

btw. is there anywhere i can check this kind of things without asking the list?

thanks

enrike