Lua 文件读取和写入
228
2017-07-17
--[[
-- C:\\Users\\eden\\Desktop\\LuaLearning\\demo\\data 中的内容
Entry{
author = "eden1" ,
title = "bookname1" ,
publishing = "publishing company1" ,
year = "1997"
}
Entry{
author = "eden2" ,
title = "bookname2" ,
publishing = "publishing company2" ,
year = "1997"
}
Entry{
author = "eden3" ,
title = "bookname3" ,
publishing = "publishing company3" ,
year = "1997"
}
Entry{
author = "eden4" ,
title = "bookname4" ,
publishing = "publishing company4" ,
year = "1997"
}
--]]
-- Entry{ <code> } 与 Entry({<code>}) 完全相同的
do
local count = 0
function Entry(...) count = count + 1 end
dofile("C:\\Users\\huangMP.DESKTOP-88ENV6P\\Desktop\\LuaLearning\\demo\\data")
print("number of entries : " .. count)
local authors = {} -- 作者姓名集合
function Entry(b) authors[b[1]] = true end
dofile("C:\\Users\\DESKTOP-88ENV6P\\Desktop\\LuaLearning\\demo\\data")
for name in pairs(authors) do
print(name)
end
end
-- 采用键值对的方式保存
--[[
-- C:\\Users\\DESKTOP-88ENV6P\\Desktop\\LuaLearning\\demo\\data2 中的内容
Entry{
author = "eden1" ,
title = "bookname1" ,
publishing = "publishing company1" ,
year = "1997"
}
Entry{
author = "eden2" ,
title = "bookname2" ,
publishing = "publishing company2" ,
year = "1997"
}
Entry{
author = "eden3" ,
title = "bookname3" ,
publishing = "publishing company3" ,
year = "1997"
}
Entry{
author = "eden4" ,
title = "bookname4" ,
publishing = "publishing company4" ,
year = "1997"
}
--]]
do
local authors = {} -- 作者姓名集合
function Entry(b) authors[b.author] = true end
dofile("C:\\Users\\DESKTOP-88ENV6P\\Desktop\\LuaLearning\\demo\\data2")
for name in pairs(authors) do
print(name)
end
end
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