Module:Sandbox/Lemondoge/Calc

Usage

Performs a calculation.

{{#invoke:Sandbox/Lemondoge|add|5|8}}

Examples

{{#invoke:Sandbox/Lemondoge/Calc|add|3|6}} returns 9

{{#invoke:Sandbox/Lemondoge/Calc|minus|6|3}} returns 3

{{#invoke:Sandbox/Lemondoge/Calc|mod|3|15}} returns 3

Error detection

The "times" function (but not the VERY similar "multiplication" function) will return a error like this: "", if the second parameter is 0, unless the third parameter is set to 1. This works by using the code below.

if num2 == 0 and errordetect ~= 1 then
   return RError("You cannot multiply a number by zero.")
else
   return num1 * num2
end

Anti-not-a-number mechanism

The "division" function (and it's similar "div" function) will normally return "-nan" if all 3 parameters are set to 0, but if the third parameter is 1, it will return "1" instead. This works with the code below:

if num1 == 0 and num2 == 0 and antinotanumber == 1 then
		return 1
	else
		return num1 / num2
	end

---

-------------This (test) module performs a calculation.-------------
local p = {}


local function RError(msg)
	return mw.ustring.format('<b class="error">%s</b>', msg)
end

function p.add(frame)
	local num1 = tonumber(frame.args[1])
	local num2 = tonumber(frame.args[2])
	return num1 + num2
end

function p.addition(frame)
	local num1 = tonumber(frame.args[1])
	local num2 = tonumber(frame.args[2])
	return num1 + num2
end


function p.minus(frame)
	local num1 = tonumber(frame.args[1])
	local num2 = tonumber(frame.args[2])
	return num1 - num2
end

function p.subtraction(frame)
	local num1 = tonumber(frame.args[1])
	local num2 = tonumber(frame.args[2])
	return num1 - num2
end

function p.times(frame)
	local num1 = tonumber(frame.args[1])
	local num2 = tonumber(frame.args[2])
	local errordetect = tonumber(frame.args[3])
	if num2 == 0 and errordetect ~= 1 then
		return RError("You cannot multiply a number by zero.")
	else
		return num1 * num2
	end
end

function p.multiplication(frame)
	local num1 = tonumber(frame.args[1])
	local num2 = tonumber(frame.args[2])
	return num1 * num2
end

function p.double(frame)
	local num1 = tonumber(frame.args[1])
	return num1 * 2
end

function p.div(frame)
	local num1 = tonumber(frame.args[1])
	local num2 = tonumber(frame.args[2])
	local antinotanumber = tonumber(frame.args[3])
	if num1 == 0 and num2 == 0 and antinotanumber == 1 then
		return 1
	else
		return num1 / num2
	end
end

function p.division(frame)
	local num1 = tonumber(frame.args[1])
	local num2 = tonumber(frame.args[2])
	local antinotanumber = tonumber(frame.args[3])
	if num1 == 0 and num2 == 0 and antinotanumber == 1 then
		return 1
	else
		return num1 / num2
	end
end

function p.mod(frame)
	local num1 = tonumber(frame.args[1])
	local num2 = tonumber(frame.args[2])
	return num1 % num2
end

function p.modulo(frame)
	local num1 = tonumber(frame.args[1])
	local num2 = tonumber(frame.args[2])
	return num1 % num2
end

function p.exp(frame)
	local num1 = tonumber(frame.args[1])
	local num2 = tonumber(frame.args[2])
	return num1 ^ num2
end

function p.exponentiation(frame)
	local num1 = tonumber(frame.args[1])
	local num2 = tonumber(frame.args[2])
	return num1 ^ num2
end

return p