" Show all mapped keys in a list - from https://stackoverflow.com/questions/13990136/display-a-ordered-vim-keyboard-mapping
function! s:ShowMaps()
  let old_reg = getreg("a")          " save the current content of register a
  let old_reg_type = getregtype("a") " save the type of the register as well
try
  redir @a                           " redirect output to register a
  " Get the list of all key mappings silently, satisfy "Press ENTER to continue"
  silent map | call feedkeys("\<CR>")
  redir END                          " end output redirection
  vnew                               " new buffer in vertical window
  put a                              " put content of register
  " Sort on 4th character column which is the key(s)
  %!sort -k1.4,1.4
finally                              " Execute even if exception is raised
  call setreg("a", old_reg, old_reg_type) " restore register a
endtry
endfunction
" use :ShowMaps to call the function
command! ShowMappings call s:ShowMaps()      " Enable :ShowMaps to call the function