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" Add me to your .vimrc :]
function! Fib(n)
if a:n == 0
return "0"
elseif a:n == 1
return "0,1"
endif
let sequence = "0,1"
let prev = 0
let curr = 1
let iter = 2
while iter <= a:n
let curr = prev + curr
let prev = curr - prev
let sequence .= "," . curr
let iter += 1
endwhile
return sequence
endfunction
function! AppendFib(n)
execute "normal! i" . Fib(a:n) . "\<Esc>"
endfunction
" Map AppendFib to \fib
:command! -nargs=1 AppendFib :call AppendFib(<q-args>)
nnoremap <Leader>fib :AppendFib<Space>
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