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A general description is here.
‘mapply()’ and hence ‘Map()’ now also obey the “max-or-0-if-any” recycling rule, such that, e.g., ‘Map(`+`, 1:3, 1[0])’ is valid now.
‘try()’ is considerably faster in case of an error and long call, as e.g., from some ‘do.call()’. Thanks to Alexander Kaever's suggestion posted to R-devel.