tome4 chn 英文空格保留

linesplit.lua

-- 删除字符串中的空格和制表符
function delSpaceTxt(txt)
	local chr = txt
	local chr_new = ""
	local len_chr = chr:len()
	local cur_char
	for i = 1 , len_chr do
		cur_char = chr:sub(i,i)
		if cur_char ~= " " and  cur_char ~= "\t" then
			chr_new = chr_new..cur_char
		elseif i~=1 and chr:sub(i-1,i-1) == '%w' then 
			chr_new = chr_new..cur_char
		-- 前置非中文，保留空格
		elseif i > 1 and string.byte(chr, i-1) < 128 then
			chr_new = chr_new..cur_char
		-- 后置非中文，保留空格
		elseif i < len_chr and string.byte(chr, i+1) < 128 then
			chr_new = chr_new..cur_char
		end
	end
	return chr_new

end