Module:Separated entries

Module documentation

This module is subject to page protection. It is a highly visible module in use by a very large number of pages. Because vandalism or mistakes would affect many pages, and even trivial editing might cause substantial load on the servers, it is protected from editing.

This Lua module is used on approximately 1,000 pages.

To avoid large-scale disruption and unnecessary server load, any changes to this module should first be tested in its /sandbox or /testcases subpages. The tested changes can then be added to this page in one single edit.

Please consider discussing any changes on the talk page before implementing them.

Uses Lua:

Usage

Module:Separated entries serves as a template front-end to mw.text.listToText. It takes any number of positional parameters and pieces them together with |separator=. |conjunction= can be optionally defined if a different separator is desired between the last and second last items. The starting positional parameter can be specified using |start=. Leading and trailing whitespace is stripped. To add deliberate leading and trailing whitespace, use the HTML escape code   for a space and 
 for a "newline". Separated entries does not raise any errors by design.

{{#invoke:Separated entries|main|separator=...}}

Tests

Module:Separated entries/testcases: All tests passed.

	Name	Expected	Actual
	testBr
	testComma
	testMain

-- This module takes positional parameters as input and concatenates them with
-- an optional separator. The final separator (the "conjunction") can be
-- specified independently, enabling natural-language lists like
-- "foo, bar, baz and qux". The starting parameter can also be specified.

local compressSparseArray = require('Module:TableTools').compressSparseArray
local p = {}

function p._main(args)
	local separator = args.separator
		-- Decode (convert to Unicode) HTML escape sequences, such as "&#32;" for space.
		and mw.text.decode(args.separator) or ''
	local conjunction = args.conjunction and mw.text.decode(args.conjunction) or separator
	-- Discard values before the starting parameter.
	local start = tonumber(args.start)
	if start then
		for i = 1, start - 1 do args[i] = nil end
	end
	-- Discard named parameters.
	local values = compressSparseArray(args)
	return mw.text.listToText(values, separator, conjunction)
end

local function makeInvokeFunction(separator, conjunction, first)
	return function (frame)
		local args = require('Module:Arguments').getArgs(frame)
		args.separator = separator or args.separator
		args.conjunction = conjunction or args.conjunction
		args.first = first or args.first
		return p._main(args)
	end
end

p.main = makeInvokeFunction()
p.br = makeInvokeFunction('<br />')
p.comma = makeInvokeFunction(mw.message.new('comma-separator'):plain())

return p