tab.search
searches for pattern within a data-frame or tibble,
returning column(s) and row(s)
tab.search(searchdata = rawdata, pattern, find.all = T, names.only = FALSE)
A list with numeric vectors for each column giving row numbers of matched elements
table to search in, predefined as rawdata
regex, for exact matches add ^findme$
return all row indices or only 1st per column,default=TRUE
return only vector of colnames rather than list with names and rows, default=FALSE