arrays - lua中的数组索引

Question

在 lua 中显示数组时，它总是从 1 开始，所以如果我使用它select * from ...作为table.id. 我现在的问题是，如果 sql 查询table.id不是以 1 开头，或者会是这样[3,5,6, ...]怎么办？

我的代码是这样的，

local data = {}

for row in db:nrows("SELECT song.id as id, song.title as song, artist.name as artist, genre.name as genre, album.title as album FROM song, artist, genre, album WHERE song.artist_id = artist.id AND song.genre_id = genre.id AND song.album_id = album.id AND song.duration = 120.00") do
                        data[row.id] = {}
                        data[row.id].song = row.song
                        data[row.id].artist = row.artist
                        data[row.id].genre = row.genre
                        data[row.id].album = row.album
end

所以输出row.id是 [3,5,6, ..] 因为我使用了row.id作为数组的索引data。

我的问题是我应该做什么或使用什么才能使数组的索引data变成这样，[1,2,3,....]？

Answer 1

您可以只使用索引变量：

local data = {}
local next = 1

for row in db:nrows("SELECT song.id as id, song.title as song, artist.name as artist, genre.name as genre, album.title as album FROM song, artist, genre, album WHERE song.artist_id = artist.id AND song.genre_id = genre.id AND song.album_id = album.id AND song.duration = 120.00") do
    data[next] = row
    next = next + 1
end