我想知道有没有办法从文件读取数据，或者只是看看它是否存在并返回true或false
function fileRead(Path,LineNumber) --..Code... return Data end
解决方法
尝试这个：
-- http://lua-users.org/wiki/FileInputOutput
-- see if the file exists
function file_exists(file)
local f = io.open(file,"rb")
if f then f:close() end
return f ~= nil
end
-- get all lines from a file,returns an empty
-- list/table if the file does not exist
function lines_from(file)
if not file_exists(file) then return {} end
lines = {}
for line in io.lines(file) do
lines[#lines + 1] = line
end
return lines
end
-- tests the functions above
local file = 'test.lua'
local lines = lines_from(file)
-- print all line numbers and their contents
for k,v in pairs(lines) do
print('line[' .. k .. ']',v)
end