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A general description is here.
The ‘numeric’ method of ‘all.equal()’ gets optional arguments ‘countEQ’ and ‘formatFUN’. If ‘countEQ’ is true, the mean error is more sensible when many entries are *eq*ual.
‘format.POSIXlt()’ now also recycles the ‘zone’ and ‘gmtoff’ list components to full length when needed, and its internal C code detects ‘have_zone’ in more cases. In some cases, this changes its output to become ‘format.POSIXct’ compatible.
Parse data now have deterministic parent nodes (PR#16041).