imported>Gabe Mitnick: Lua task #9 step 3 error handling

2017-12-19T23:46:51Z

Lua task #9 step 3 error handling

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-- Gabe Mitnick Google Code-in 2017, Introduction to Lua in Wikipedia

local p = {} -- p stands for package

p.hello = function(frame)
return "Hello, world!"
end

-- inspired by isitthursday.org
-- returns whether or not it is Thursday,
-- or some other day specified by the day argument.
-- for example: {{#invoke:Sandbox/Gabe_Mitnick|thursday|day=Monday}}
-- os.date isn't accurate for the user's timezone, but for some other timezone.
p.thursday = function(frame)
weekday = frame.args.day or "Thursday"
if os.date("%A") == weekday then
return "it is " .. weekday
else
return "it's not " .. weekday
end
end

-- from RexxS
p.Hi = function(frame)
strName = frame.args.name or "Jimbo"
return "Hello from Lua to my friend " .. strName .. ". "
end

p.temperature = function(frame)
cel = frame.args.celsius or 0
fah = cel * 9 / 5 + 32
msg = cel .. " degrees Celsius is " .. fah .. " degrees Fahrenheit. "
if (tonumber(cel) > 9) then
msg = msg .. "It is warm. "
else
msg = msg .. "It is cold. "
end
return msg
end

-- Displays a mathematical "times-table"
-- The number base for the times-table is passed as parameter "num"
-- If no parameter or a blank parameter or a value less than 2 is passed, use 2
p.times = function(frame)
local num = tonumber( frame.args.num ) or 2
local out = num .. " times table "
for i = 1, 12 do
out = out .. num .. " times " .. i .. " equals " .. i * num .. " "
end
return out
end

p.mum = function(frame)
local family = {"Dad", "Mum", "Uncle Stan", "Aunty Elsie", "Brian", "Grandma", "Cinnamon", "Beth"}
local msg = ""
for i = 1, #family do
msg = msg .. "Hello " .. family[i] .. " "
end
return msg
end

p.langnames = function(frame)
local langs = mw.language.fetchLanguageNames()
local langlist = ""
local count = 0
for key, value in pairs( langs ) do
langlist = langlist .. key .. " - " .. value .. " "
count = count + 1
end
return langlist .. " = " .. count .. " languages"
end

p.pageinfo = function(frame)
if (frame.args.title == nil) then
error("Please provide an artictle title")
else
local titleObj = mw.title.new(frame.args.title)
local returnVal = frame.args.title
if (titleObj.exists) then
returnVal = returnVal .. " exists and is "
else
returnVal = returnVal .. " does not exist and is "
end
if (titleObj.isRedirect) then
returnVal = returnVal .. "a redirect. "
else
returnVal = returnVal .. "not a redirect. "
end
return returnVal
end
end
return p

Module:Sandbox/Gabe Mitnick - Revision history

imported>Gabe Mitnick: Lua task #9 step 3 error handling