Module:Separated entries

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This Lua module is used on 1,153,000+ 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.

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 iThempleti:Para. iThempleti:Para can be optionally defined if a different separator is desired between the last and second last items. Leading and trailing whitespace is stripped; if the iThempleti:Para should contain spaces, use the HTML escape code  . Separated entries does not raise any errors by design.

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

-- 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".

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 named parameters.
	local values = compressSparseArray(args)
	return mw.text.listToText(values, separator, conjunction)
end

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

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

return p