Quote:
Originally Posted by kovidgoyal
A diff tool is useful for seeing the changes in the code of a book. If you want to compare two books to see which one to keep, open them in the viewer.
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a diff tool has many uses the the idea that a tool can only be used for 1 thing is a little short sighted... designing a tool so that many use cases are feasable is smart design. Comparing books to decide which to keep is something i bet many people using Calibre would use. currently opening the 1st then comparing to another does work but how is this different to selecting both books from rhe library? you could select a totaly different book in the editor and selecting both from the library makes sure the right book is selected instead of making sure the directory is the one you want when opening the 2nd book.
Unfortunately the viewer is not realy up to the task of showing differences in multiple files quickly... The best alternative i can think of currently is extracting both books then using a tool like winmerge, to show differences then selecting the book to keep... winmerge also allows eding side by side which is handy...