Gary Johnson wrote:
You could first sort the file,
:%sort
then search for duplicate lines in the result,
/\(^.*\)\n\1
If sorting the file is allowed, I'd use Gary's solution with one
small tweak:
/^\(.*\)\n\1$
(adding the "$") to prevent these sorts of matches from being found
1234
12345
If you don't want to sort the file, you could use something like
/^\(.*\)\ze\_$\_.\{-}\_^\1$
which would find/highlight anything that has a following match
(which means the final match wouldn't be hit). It may be a bit
slow with a larger file because of the distance it may have to
search for each line, but it should be a good way to find hits
without sorting your file.
If you want to have them all in a data-structure, you can use
Brett's suggestion
:let dict = {}|let arr = []|g/^./exe "if has_key(dict, getline('.'))|
call add(arr, line('.'))|endif|let dict[getline('.')] = 1"
though I don't think the "exe" is needed, making it
:let d={}|let a=[]|g/^./if has_key(d, getline('.'))|call add(a,
line('.'))| endif | let d[getline('.')] = 1
You can adjust what gets stashed in "a" instead of line('.') if
you want the duplicates' content instead of line#.
-tim
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