Editing Module talk:TableTools (section)

== Duplicate handling with "invert" ==

I wonder if it would be useful to have something like {{code|invert|lua}} that supports duplicates by providing values that are arrays of indices from the original input array. —[[User:Uzume|Uzume]] ([[User talk:Uzume|talk]]) 19:37, 17 December 2021 (UTC)
:Currently, <code>p.invert({'a','b','c','a'})</code> would give <code>{a=4,b=2,c=3}</code>. I think the proposal is that it might give <code>{a={1,4},b=2,c=3}</code>. Perhaps, but this kind of consideration might be best handled after considering a real need at Wikipedia. Another possibility would be to throw an error if a duplicate occurs, possibly controlled by a parameter saying what should happen with duplicates. I don't think we should worry about that unless a need arises. [[User:Johnuniq|Johnuniq]] ([[User talk:Johnuniq|talk]]) 01:01, 18 December 2021 (UTC)
::{{re|Johnuniq}} I agree about waiting for an actual need but I thought I would bring up this lack of functionality anyway. I was thinking more along the lines of: {{code|p.invert{'a','b','c','a'}|lua}}→{{code|{a{{=}}{1,4},b{{=}}{2},c{{=}}{3}<noinclude/>}|lua}} but you got the gist of my suggestion/observation.—[[User:Uzume|Uzume]] ([[User talk:Uzume|talk]]) 23:00, 30 December 2021 (UTC)