function _init()
last={{0,0},{0,0}}
def={{0,0},{0,0}}
--shouldn't throw error
assert(last==def)
end |
These metatables are identical, but for some reason, they are not considered equal. Why is this? I tested something similar with regular tables and they work just fine, so I doubt metatable comparisons aren't supported by PICO-8. Does anyone know what's happening here?
Terminology: Those are just regular tables. Metatables are special tables that control how a table functions.
As for why they are considered different, Lua does not do a deep compare on tables. The == operator will only tell you if the table referred to by a variable is the same one referred to by another. For instance:
> t1 = { 1, 2, 3 }
> t2 = { 1, 2, 3 }
> t3 = t2 -- this copies the reference, not the table
> print( t1 == t2 )
false
> print( t2 == t3 )
true |
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