Editing Module talk:Arguments (section)

== Using ipairs ==

I have not seriously used Module:Arguments so now that I'm looking at how it is used in [[Module:Team appearances list]], I am puzzled about the default options and <code>ipairs</code>. What happens if a module does the following?
<syntaxhighlight lang="lua">
local getArgs = require('Module:Arguments').getArgs
local args = getArgs(frame)  -- where frame is from a template invoke
for i, v in ipairs(args) do
    print(i, v)
end
</syntaxhighlight>
I gather that works as expected with something like <code><nowiki>{{example|one|two|three}}</nowiki></code> (and it would trim any leading/trailing whitespace from each parameter).

However, it would only process "one" in <code><nowiki>{{example|one||three}}</nowiki></code> because the blank second parameter would be converted to nil, and that would terminate ipairs.

Does that mean that anything using Module:Arguments with a variable number of numeric arguments must use something like <code>compressSparseArray</code> from [[Module:TableTools]] (or set options to not trim/remove parameters)? If that is true, I would have thought it would be mentioned in the documentation here. Did an early version of Module:Arguments default to removing blank parameters so ipairs processes each provided numeric parameter (that's what I thought happened)? [[User:Johnuniq|Johnuniq]] ([[User talk:Johnuniq|talk]]) 03:25, 18 November 2016 (UTC)

:{{re|Johnuniq}} Have you found a solution for this problem? —&nbsp;[[User:UnladenSwallow|UnladenSwallow]] ([[User talk:UnladenSwallow|talk]]) 01:58, 15 May 2020 (UTC)
::{{re|UnladenSwallow}} I haven't looked for a solution because I don't like obscure layers. Module:Arguments appears to be very efficient although it appears to do quite a lot of work, yet it seems unnecessary overhead to me. I've never needed the module and I don't know if the above is a problem now. [[User:Johnuniq|Johnuniq]] ([[User talk:Johnuniq|talk]]) 03:38, 15 May 2020 (UTC)