Hi, given a recent bug I reported https://sourceforge.net/p/pure-data/bugs/1293/
and someone's request that we should have a more complete and updated expr-help.pd file, I thought I'd make this more complete revision of the object, so I found another issue, and also have proposed some updates/features.
And I'd also like to volunteer to create a complete/full documentation of expr functions to be included in the next pd release.
cheers