Adminsuzy: 1 revision imported

2020-09-13T20:46:57Z

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2020-07-28T16:56:52Z

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<includeonly>{{Module rating|release}}[[Category:Modules for general use]]</includeonly>
This module contains the functions for different templates, solving their '''iteration problem'''
:The Wikipedia template coding does not support the repetitive processing of a parameter set,
:which leads often to a very primitive and long chain of parameter checks in the kind of {{#tag:syntaxhighlight|<nowiki>
{{#if:{{{1|}}} | perform an action with parameter 1 }}
{{#if:{{{2|}}} | perform an action with parameter 2 }}
{{#if:{{{3|}}} | perform an action with parameter 3 }}
{{#if:{{{4|}}} | perform an action with parameter 4 }}
•••
•••
{{#if:{{{33|}}} perform an action with parameter 33 }}</nowiki>|lang="text"}}
with the disadvantage that such a construct will fail as soon as there comes a 34{{exp|nd}} parm.

I always thought that with Lua and its <tt>for</tt> loops this iterations should be possible, somehow. 
After long searching without any success and without an idea how to perform it, I asked at several forums 
and got finally from {{Ut|Trappist the monk|+|en}} the helping hint to solve it with a control structure like{{#tag:syntaxhighlight|
local out = {}
for i, v in ipairs (args) do
table.insert (out, frame:expandTemplate{ title = title, args = v })
end
return table.concat (out)|lang="text"}}
The functions contained therein are from very simple, just one parameter to pass, 
to more complicated ones, where e.g. a pair of parameters needs kind of a flip-flop switch 
when always a tuple of e.g. an item and its correlated text needs to be passed. 
 
When there are tuples, triples etc., the <tt>table.insert</tt> occurs, when the last element is processed; 
this performs problems when the last group is incomplete – it should be finished with empty values 
to trigger the <tt>table.insert</tt>. The check with <tt>table.maxn</tt> seems not to work correctly ? 
''This'' problem is solved differently, for the function "attribs" with a primitive workaround.
 
=== File list templates ===
The three "Ifim " templates avoid to display the file itself as an 'other version'. 
There are currently five templates creating file lists with the <tt>function:filelist</tt>
# {{T0|Other versions}} a vertical list (without initial)
# {{T0|Filelist}} a horizontal list (without initial)
# {{T0|Derivative versions}} a vertical list
# {{T0|Derived from}} a vertical list
# {{T0|File}} a horizontal list
All these templates support also the "gallery" option.

=== Other file lists ===
The <tt>function:svglang</tt> creates a list of just file_names and language_codes, for
#<li value="6"> {{T0|Svg lang}}
# {{T0|Lang gallery}}
Much more is created by the <tt>function:ownbased</tt> for the template
#<li value="8">{{T0|Own based}} 
which will handle in the ''majority of cases'' just one file, but can serve an unlimited number. 
This list can be controlled by the user to be displayed <tt>either</tt> horizontally or vertically. 
#<li value="9">{{T0|Attribs}} 
The template works, whether there is a user assigned for a file, or one filename follows another.

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