Modül:ParameterCount
-- This module produces a count of all the arguments passed to it. local yesno = require('Module:Yesno')
-- Trim a string
local function trim(s) return s:match('^%s*(. -)%s*$')
end
-- Test whether a string is blank
local function isBlank(s) return not s:find('%S')
end
-- Tests whether a string is a valid positional key, and if so, returns it.