Re: vim function argument

thanks a lot, I get the final version.

function InsertNumber(start, end,...) " step, radix(d,o,x), is_padding
let l:i = a:start
let l:curr_line = 0

let l:step = get(a:000,0,1)
"echo l:step
if l:step <= 0
echo "Error: step cannot <= 0."
return -1
endif

let l:radix = get(a:000,1,'d')
"echo l:radix

if a:0 == 3
let l:is_padding = 0
else
let l:is_padding = 1 "default padding
endif

if l:radix == "o"
"let l:width = strlen(printf('%o',a:end))
let l:width = len(a:end)
let l:format = '%0'.l:width.'o'
elseif l:radix == "x"
"let l:width = strlen(printf('%x',a:end))
let l:width = len(a:end)
let l:format = '%0'.l:width.'x'
else
"let l:width = float2nr(trunc(log10(a:end))) + 1
"let l:width = strlen(printf('%d',a:end))
let l:width = len(a:end)
let l:format = '%0'.l:width.'d'
endif

while l:i <= a:end
if l:is_padding == 1
call append(l:curr_line, printf(l:format, l:i))
else
call append(l:curr_line, l:i)
endif
let l:i += l:step
let l:curr_line += 1
endwhile
endfunction

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