I have a source file with two similar yet subtly different sections. I’d like to merge the two sections into one subroutine with a parameter that handles the subtle differences, but I need to be sure I’m aware of them all so I don’t miss any.
What I usually do in such cases is copy each of the sections to a separate file and then use tkdiff or vimdiff to highlight the differences. Is there any way to skip the intermediate files and just diff two parts of the same file?
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Answer
The linediff plugin for Vim works well for me. Visually select one section of your file and type :Linediff. Visually select the other section and type :Linediff. It will put vim in to vimdiff mode, showing only the two sections you highlighted previously. Type:LinediffReset to exit vimdiff mode.
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