lua中的表值排序

本文介绍了lua中的表值排序的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我有一张这样的桌子:

tbl = { ['etc1'] = 1337, ['etc2'] = 14477, ['etc3'] = 1336, ['etc4'] = 1335 }

现在我需要对这张表进行排序，以将输出从高位转换为最低值:

And now I need to sort this table to get output from highes to lowest value:

tbl = { ['etc2'] = 14477, ['etc1'] = 1337, ['etc3'] = 1336, ['etc4'] = 1335 }

已经尝试了很多功能，例如table.sort或官方手册中的其他功能，但没有任何帮助.所以希望你能帮帮我！

Already tried lots of functions like table.sort or others from the official manual, but nothing helped. So hope you'll help me out guys!

致谢.

推荐答案

Lua表除通过其键进行排序外没有其他排序.您将需要像这样更结构化数据:

Lua tables do not have ordering other than by their keys. You will need to structure your data more like this:

tbl = { [1] = { ['etc2'] = 14477 }, [2] = { ['etc1'] = 1337 }, [3] = { ['etc3'] = 1336 }, [4] = { ['etc4'] = 1335 } }

或者这个:

tbl = { [1] = { 'etc2', 14477 }, [2] = { 'etc1', 1337 }, [3] = { 'etc3', 1336 }, [4] = { 'etc4', 1335 } }

或此，如果要与原始表一起使用:

or this, if you want to use it in conjunction with the original table:

tbl_keys = { [1] = 'etc2', [2] = 'etc1', [3] = 'etc3', [4] = 'etc4' }

请注意，我非常明确，并写下了所有数字索引.您当然可以省略它们，所以最后的解决方案是:

Note that I was very explicit and wrote all the numeric indices. You can of course omit them, so the last solution would be:

tbl_keys = { 'etc2', 'etc1', 'etc3', 'etc4' }

也许这意味着您应该编写一个函数，将原始数据转换为这种新形式，或者您可以在表格首次创建之前就将其完成.

Maybe this means you should write a function which turns the original data into this new form, or maybe you can get it done earlier on, before the table is made in the first place.