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词条 Module:If empty/sandbox
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local p = {}

function p.main(frame)

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

local lastk = 0

for k,v in ipairs(args) do

if v ~= then

return v

end

lastk = k

end

-- For backwards compatibility reasons, the first 8 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 = lastk + 1, 9 do

if args[i] and args[i] ~= then

-- If any uses of this template depend on the behavior above, add them to a tracking category.

-- This is a rather fragile, convoluted, hacky way to do it, but it ensures that this module's output won't be modified

-- by it.

frame:extensionTag('ref', , {group = 'TrackingCategory'})

frame:extensionTag('references', , {group = 'TrackingCategory'})

return args[i]

end

end

end

return p

1 : Instances of Template:If_empty missing arguments

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