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[1] [2] On most modern Unix-like systems, even BSD-derived ones like FreeBSD and NetBSD, the diff3 provided is GNU's version in diffutils (formerly GNU Tools). This version has the ability to merge files on its own without relying on ed. It internally invokes diff to do the comparison, but can use any other compatible tool too. [3]
[2] The three-way merge looks for sections which are the same in only two of the three files. In this case, there are two versions of the section, and the version which is in the common ancestor "C" is discarded, while the version that differs is preserved in the output. If "A" and "B" agree, that is what appears in the output.
Version control browsing Patch creation Patch application Patch preview Unicode support XML-aware Beyond Compare: Yes Yes Yes SVN Yes Yes Yes Yes Compare++: SVN, CVS, Git, Microsoft TFS, Perforce, VSS using command line Yes diff: No No No Yes Yes with patch Yes with patch No No diff3: No No No Eclipse (compare) Yes CVS, Subversion, Git ...
Meld is a visual diff and merge tool, targeted at developers. It allows users to compare two or three files or directories visually, color-coding the different lines. Meld can be used for comparing files, directories, and version controlled repositories.
In computing, the utility diff is a data comparison tool that computes and displays the differences between the contents of files. Unlike edit distance notions used for other purposes, diff is line-oriented rather than character-oriented, but it is like Levenshtein distance in that it tries to determine the smallest set of deletions and insertions to create one file from the other.
Additionally there is a single-row version, UPDATE OR INSERT INTO tablename (columns) VALUES (values) [MATCHING (columns)], but the latter does not give you the option to take different actions on insert versus update (e.g. setting a new sequence value only for new rows, not for existing ones.)
(Reuters) -U.S. President-elect Donald Trump's transition team is exploring ways to significantly reduce, merge, or even eliminate the top bank regulators in Washington, the Wall Street Journal ...
- This merge is the most reliable and has performed well in practice. No sources, personal opinion. - This automatic merging is something that even experienced programmers (only exposed to a two-way diff) often find miraculous and is an enormous breakthrough in computer science that is normally not taught as such.