Module:For loop
Revision as of 19:05, 17 July 2018 by wikipedia>Pppery (Pppery moved page Module:ForLoop to Module:For loop without leaving a redirect: Make module name match template name)
Documentation for this module may be created at Module:For loop/doc
-- This module implements {{for loop}}.
local getArgs = require('Module:Arguments').getArgs
local yesno = require('Module:Yesno')
local makeTemplate = require('Module:Template invocation').invocation
p = {}
function p.main(frame)
local args = getArgs(frame, {
trim = false,
removeBlanks = false
})
return p._main(args)
end
function p._main(args)
local template = args['call'] or 'void'
local calltemplates = yesno(args.substall or "", true) or not mw.isSubsting()
local variableParam = args.pv
variableParam = tonumber(variableParam) or variableParam or 1 -- fix for positional parameters
local variableValPrefix = args.prefix or ''
local variableValPostfix = args.postfix or ''
local sep = args[1] or ''
local constantArgs = p.getConstants(args)
local variableVals = p.getVariableVals(args)
local result = ''
local addSeparator = false;
for i, v in ipairs(variableVals) do
v = mw.text.trim(v) -- trim whitespace
if #v > 0 or not yesno(args.skipBlanks) then
if addSeparator then
result = result .. sep
end
addSeparator = true;
local targs = constantArgs
targs[variableParam] = variableValPrefix .. v .. variableValPostfix
if calltemplates then
result = result .. p.callTemplate(template, targs)
else
result = result .. makeTemplate(template, targs)
end
end
end
return result
end
function p.getConstants(args)
local constantArgNums = p.getArgNums(args, 'pc', 'n')
local constantArgs = {}
for _, num in ipairs(constantArgNums) do
local keyArg = 'pc' .. tostring(num) .. 'n'
local valArg = 'pc' .. tostring(num) .. 'v'
local key = args[keyArg]
key = tonumber(key) or key
local value = args[valArg]
constantArgs[key] = value
end
return constantArgs
end
function p.getVariableVals(args)
local variableVals = {}
for i, v in ipairs(args) do
if i ~= 1 then
variableVals[i - 1] = v
end
end
return variableVals
end
function p.getArgNums(args, prefix, suffix)
-- Returns a table containing the numbers of the arguments that exist
-- for the specified prefix and suffix.
local nums = {}
local pattern = '^' .. prefix .. '([1-9]%d*)' .. suffix .. '$'
for k, v in pairs(args) do
local num = tostring(k):match(pattern)
if num then
nums[#nums + 1] = tonumber(num)
end
end
table.sort(nums)
return nums
end
function p.callTemplate(template, targs)
return mw.getCurrentFrame():expandTemplate{title = template, args = targs}
end
return p
