VIM functions to perform unix like sort and uniq commands.

1. The following defines two functions, implemented directly in VIM language. In this example the unix like: sort and uniq commands are implemented, using VIM build in language.


2. The need for sort uniq, on text files, has been discussed in this site:
   remove file repetition
   A simple example of verifying uniqueness in seed generating without leaving vim:
   sort, uniq on a marked VIM text
   VIM running a shell command on a block
   sort, uniq using shell commands
   


3. The code can be either added to ~/.gvirc or written in a file.vim and sourced, when needed:
   :so file.vim
   
   func Strcmp(i1, i2)
     return a:i1 == a:i2 ? 0 : a:i1 > a:i2 ? 1 : -1
   endfunction
   
   
   func SortBuffer()
     let lines = getline(1, '$')
     call sort(lines, function("Strcmp"))
     call setline(1, lines)
   endfunction
   
   func MyUniq()
     " start from first line
     call cursor(1, 1)
     " while we're not on the last line
     while line(".") < line("$")
       " current line is the same as last line
       if getline(".") == getline(line(".") - 1)
         " so delete it
         delete
         " current line != last line
       else
         " just go to next line
         normal j
       endif
     endwhile
     " we are on the last line
     while getline(".") == getline(line(".") - 1)
       " remove it if it matches
       delete
       " the line before
     endwhile
   endfunction
   


4. To use it either source it or add it to ~/.gvimrc. The latter requires also the following lines:
   
   func VIMsu()
     call SortBuffer()
     call MyUniq()
   endfunction
   nmap vsu :call VIMsu()<CR>
   


5. Recently a friend told me that VIM has command to do that. :sort u