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A general description is here.
‘as.table()’ now allows tables with one or more dimensions of length 0 (as with ‘as.table(integer())’).
‘all.equal()’ gains methods for ‘environment’s and ‘refClass’es.
‘[<-’ and ‘[[<-’ gain S4 ‘data.frame’ methods to avoid corruption of S4 class information by the S3 methods.
‘callNextMethod()’ should now work within a ‘.local’ call when ‘...’ is absent from ‘formals(.local)’.