I made this Metatable and used the __pow Metamethod, but my numbers aren't being squared. How can I make my Metatable square given numbers? Any and all help is appreciated.
local metatable = {
__pow = function(t)
local squares = {}
for key, value in pairs(t) do
squares[key] = value
end
return squares
end
}
table2 = setmetatable({2,3,4}, metatable)
print(table.concat(table2, "; "))
There are two issues in your code.
The first is that the __pow metamethod is only called when you use the exponentation operator (^) on the table. Since you're not doing this, the function is never called.
Secondly, even if the function was called, it doesn't do anything to change the numbers.
The complete code is here:
local metatable = {
__pow = function(t, power) -- Notice the extra argument, 'power'. This is the second value.
local squares = {}
for key, value in pairs(t) do
squares[key] = value^power -- We set the number to value^power here.
end
return squares
end
}
table2 = setmetatable({2,3,4}, metatable)
print(table.concat(table2^2, "; ")) -- We also use the power operator to call the __pow metamethod.
Hopefully this does what you are trying to achieve.
(Also, as the comment says, you should put your code in a code block next time)
Thanks mate!
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2 comments
put it in a code block so we can read it better.
Edited to fix formatting