Module:Pn: Difference between revisions

Revision as of 17:31, 15 May 2020

Latest revision as of 18:00, 29 May 2024

(9 intermediate revisions by one other user not shown)

Line 2:

Module that returns one value from a list of unnamed parameters

Named parameter idx is the index of the parameter that is to be returned

NegativesNegative indices count backward from the end of the list

==]]

local p = {}

p.getVal = function(frame)

local args = frame.args{}

-- copy arguments from frame object and its parent

for k, v in pairs(frame.args) do

args[k] = v

end

args for =k, v in pairs(frame:getParent().args) do

args[k] = v

end

if not args[1] then

return nil

args = frame:getParent().args

if not args[1] then return error("No values supplied") end

end

local idx = tonumber(args.idx) or 1

if idx < 10 then idx = #args + idx + 1 end

if idx > #args then idx = #args end

return args[idx]

end