rbind.fill: if a column contains both factors and characters (in different inputs), the resulting column will be coerced to character
When there are more than 2^31 distinct combinations
id, switches to a slower fallback strategy using strings (inspired by
merge) that guarantees correct results. This fixes problems with
join when joining across many columns. (Fixes #63)
split_indices checks input more aggressively to prevent segfaults. Fixes #43.
fix small bug in
loop_apply which lead to segfaults in certain circumstances. (Thanks to Pål Westermark for patch)
iterators moved to suggests from imports so that plyr now only depends on base R.