Logical and/or do not short-circuit

sahara-min

a = foo() and bar()
sleep(2)

function foo()
    print("foo")
return false

function bar()
    print("bar")
return false

I expected this little program to print "foo", but it actually prints "barfoo".
Looks like 'and' evaluates its operands right to left and does not short-circuit evaluation when the first operand evaluates to false. I don't know if this is a bug but it's a bit different from how logical operations usually work in other languages.

Spacemario

@sahara-min I once ran into a bug in my game, and it was due to me assuming operators short-circuit, which they weren't. I re-wrote the single if statement into a nested one, and my bug went away.

So I think you're on to something here :D