Module:Set to list

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This is a meta-module, designed to convert a "set" table (keys where the values are set to true) into a list. It does not work if called from a regular template.

Syntax

require('Module:Set to list').setToList( { a = true , b = true , c = true } )

returns

{ a , b , c }

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-- Converts a set (table with values as true) to a list (array of keys)
return function (set)
	local list = {}
	for key, value in pairs(set) do
		if value then
			table.insert(list, key)
		end
	end
	table.sort(list)
	return list
end