Vim : how to index a plain text file?

Question

Is it possible to index a plain text file (a book) in vim such as :

1. This line contains the words : London, Berlin, Paris
2. In this line, I write about :          


        

Answer 1

Have a look at ptx, perhaps

:%!cut -d: -f2 | ptx -Ar

Will output something like this, when unmodified:

:1:                         London,   Berlin, Paris
:2:               New-York, London,   Berlin
:1:                                   London, Berlin, Paris
:2:                       New-York,   London, Berlin
:2:                                   New-York, London, Berlin
:4:                                   New-York, Paris
:1:                 London, Berlin,   Paris
:4:                       New-York,   Paris
:2:                            New-   York, London, Berlin
:4:                            New-   York, Paris

I'll see if I can the rest of the steps too