fixed while with a break. Similar issues as if() inside a for loop. Resolve both of these
callbacks2.R not working, but rest are
removed the printing of the filled in expression. Just debugging
additional routines we can call
list subsetting; compiling lapply()  better behaved
dataFrameSubset working
get the argument names in the call correct
allow the caller to specify the names of R variables so we can ignore those.
callbacks with R global variable (bob) working
handle local variables properly when passing to R
works, and shows different wrinkles