Diff
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(Redirected from Diffs)
Diff is a class of programming utilities that compares two or more files for changes or differences between them and frequently offer methods to merge one or more files together as well. This tool is both available as a separate utility but is frequently also embedded into IDEs and text editors.
File output
- Edit script
- can be generated by modern implementations with the -e option
- Context format
- introduced with 2.8 BSD (July 1981)
- Unified format
- introduced by unidiff (Aug 1990), GNU diff 1.15 (Jan 1991)
Although many newer diff tools have modified the output file format for more flexibility, the original diff output file format has become something of a standard since a number of utilities and systems can open up diff files for further processing or visualisation.
Implementations
- GNU diffutils - Open source
- OS/2 PM
- Araxis PMDiff - last version 4.0c freeware
- Java GUI
- Guiffy - Commercial
- Text editor support