Difference between revisions of "Module:If empty/sandbox"
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blackwiki>Jackmcbarn (←Created page with 'local p = {} function p.main(frame) local args = require('Module:Arguments').getArgs(frame, {wrappers = 'Template:If empty', removeBlanks = false}) -- For ba...') |
blackwiki>Jackmcbarn (fix bug where later parameters are unnecessarily expanded) |
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| 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}) | ||
| + | |||
| + | 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, | -- 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. | -- even though there's really no legitimate use case for this. At some point, this will be removed. | ||
| − | + | for i = lastk + 1, 9 do | |
| − | for i = | + | if args[i] and args[i] ~= '' then |
| − | if args[i] = | + | -- 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', '[[Category:Instances of Template:If_empty missing arguments]]', {group = 'TrackingCategory'}) | ||
| + | frame:extensionTag('references', '', {group = 'TrackingCategory'}) | ||
| + | |||
| + | return args[i] | ||
end | end | ||
end | end | ||
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end | end | ||
return p | return p | ||
Revision as of 04:45, 28 December 2014
Documentation for this module may be created at Module:If empty/sandbox/doc
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', '[[Category:Instances of Template:If_empty missing arguments]]', {group = 'TrackingCategory'})
frame:extensionTag('references', '', {group = 'TrackingCategory'})
return args[i]
end
end
end
return p