Input

" Levenshtein distance between two strings
function! LD(s1, s2)
  let l1 = strlen(a:s1)
  let l2 = strlen(a:s2)
  if l1 <= 0
    return l2
  elseif l2 <= 0
    return l1
  elseif a:s1[0] ==# a:s2[0]
    return LD(a:s1[1:], a:s2[1:])
  else
    return 1 + min([
    \ LD(a:s1, a:s2[1:]), LD(a:s1[1:], a:s2), LD(a:s1[1:], a:s2[1:])
    \ ])
  endif
endfunction
" Humm... Is this useful?
"nmap M I=LD("a","b")

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