compare() now labels output as old and new, since that’s the most natural way to use it.
compare() can selectively ignore attributes by providing vector to ignore_attr (#45).
print() method gets n argument to allow explicitly specifying number of differences to show (@mnazarov).
Improvements to comparison display:
Zero length vectors compare robustly (#39)
Line-by-line comparisons show modifications as deletion then addition, rather than addition then deletion (#44).
Differences between numeric vectors are more robust, particularly in the presence of missing values (#43). The number of digits selected has also been slightly improved so that you’re more likely to get exactly the number of digits needed.
All objects: class (#26) and names (#31) are ignored when ignoring attributes.
Numeric and logical vectors: clearer display of differences. Numbers are right-aligned, and we show the numbers not the differences.
Character vectors: a trailing newline is no longer ignored (#37).
Lists: all elements of the unnamed lists are compared, not just the last! (#32)
Lists: unclassed prior to comparison (#21).
Data frames: The internal representation of row names is no longer used; instead we use the same result of rownames() (#23).
Environments: New ignore_formula_env and ignore_function_env arguments to ignore formula and function environments for compatibility with all.equal() (#24).
Expression objects: can now be compared (#29).
Calls: srcrefs and attributes are ignored.
compare_proxy() is now exported so that you can provide methods if your objects need special handling (particularly needed for objects that contain external pointers) (#22).
Fixed a partial argument name in as.list().
NEWS.md file to track changes to the package.