Module:If empty: Difference between revisions

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(properly handle blanks acting like empties (I'm not sure it's a good idea to do this at all, but if it is, this is how you should do it))
(add comment)
Line 3: Line 3:
 
function p.main(frame)
 
function p.main(frame)
 
local args = require('Module:Arguments').getArgs(frame, {wrappers = 'Template:If empty', removeBlanks = false})
 
local args = require('Module:Arguments').getArgs(frame, {wrappers = 'Template:If empty', removeBlanks = false})
  +
  +
-- For backwards compatibility reasons, the first 9 parameters can be unset instead of being blank,
  +
-- even though there's really no legitimate use case for this. At some point, this will be removed.
 
for i = 1,9 do
 
for i = 1,9 do
 
if args[i] == nil then
 
if args[i] == nil then
Line 8: Line 11:
 
end
 
end
 
end
 
end
  +
 
for _,v in ipairs(args) do
 
for _,v in ipairs(args) do
 
if v ~= '' then
 
if v ~= '' then

Revision as of 16:24, 23 December 2014

Documentation for this module may be created at Module:If empty/doc

local p = {}

function p.main(frame)
	local args = require('Module:Arguments').getArgs(frame, {wrappers = 'Template:If empty', removeBlanks = false})

	-- For backwards compatibility reasons, the first 9 parameters can be unset instead of being blank,
	-- even though there's really no legitimate use case for this. At some point, this will be removed.
	for i = 1,9 do
		if args[i] == nil then
			args[i] = ''
		end
	end

	for _,v in ipairs(args) do
		if v ~= '' then
			return v
		end
	end
end

return p