---字符串分割
function string:split(sep)
    --sep = sep or "\t"
	local fields = {}
	local pattern = string.format("([^%s]+)", sep)
    self:gsub(pattern, function(c) fields[#fields+1] = c end)
	return fields
end

---字符串直接转Number
function string.splitToNumber(InStr, sep)
	--sep = sep or "\t"
	local  fields = {}
	local pattern = string.format("([^%s]+)", sep)
    InStr:gsub(pattern, function(c) fields[#fields+1] = tonumber(c) end)
	return fields
end