NEWS.md
compare() gains a new max_diffs argument that allows you to control the maximum number of differences shown. Set max_diffs = Inf to see all differences (#49)
Logical vectors fall back to element-by-element comparison in more cases (#51).
Long-form diff no longer confuses additions and deletions (#52, @krlmlr).
Handle S4 objects that have attributes that are not slots.
Additions are now coloured blue and deletions yellow (instead of the opposite).
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().