| fillList | R Documentation | 
Loop through list, get unique names and make sure every element has those names
fillList(x, namesList = unique(unlist(lapply(x, names))), fill = NA)
| x | list to loop through | 
| namesList | names to make sure every element has (and delete extras) | 
| fill | value to insert in missing elements | 
list with missing elements filled in and elements not in namesList removed
fillList(list(c('a'=1,'b'=2),c('c'=3)))
fillList(list(c('a'=1,'b'=2),c('c'=3)),namesList='a')
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