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While Lua allows the true and false boolean values, wikicode templates can only express boolean values through strings such as "yes", "no", etc. This module processes these kinds of strings and turns them into boolean input for Lua to process. It also returns nil values as nil, to allow for distinctions between nil and false. The module also ...
Indentation, extra whitespace, and (with one exception) newlines don't change syntax or semantics. Almost everything is a table. If it isn't a table, it's a string, a number, a boolean, a function, or a nil. Libraries are tables. string.gmatch is the "gmatch" entry in the table named by the global variable string.
-- This will not normally be used because it's an expensive call. local qid = frame. args. qid if qid and (# qid == 0) then qid = nil end local entity = mw. wikibase. getEntity (qid) local props if entity and entity. claims then props = entity. claims [propertyID] end if props then-- Check that the first value of the property is an external id ...
Therefore, return {mw. ustring. gmatch ("Hello world", "(.*)")} is actually a complete Lua module (though a very strange one) - it returns the function returned by mw.ustring.gmatch (an iterator function listed in the Lua reference cited above) as the one and only element in an array (represented within {})—which when executed using {{#invoke ...
Takes an array t with one or more nil values, and removes the nil values while preserving the order, so that the array can be safely traversed with ipairs. Any keys that are not positive integers are removed. For example, for the table {1, nil, foo = 'bar', 3, 2}, compressSparseArray will return {1, 3, 2}.
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Unlike in wikicode, Lua does not use functions like #ifexpr and #expr. Add the Lua operators and functions straight into your module. Add the Lua operators and functions straight into your module. See mw:Help:Calculation for details on how #expr and mw . ext .
This parameter is optional, and defaults to nil. options: A table of options. This parameter is optional. The following options can be specified in the options table: pretty: If true, output the string in "pretty" format (as in pretty-printing). This will add new lines and indentation between table items. If false, format everything on one line.