I don't think you understand what I am trying to say.
The unary '+' operator is completely pointless if something is already a number, it is a no-op. Literally the only time anyone would ever type +x is if x is not a number, if someone chose to write +x and x turned out to unexpectedly be an array, pretty much the only thing that you know they were thinking of when they wrote the + was that they thought x isn't a number; maybe a string if they were using +x instead of parseFloat(x), but definitely not a number.
It just isn't a reasonable example of a situation where an array is being used where a number should be, +x where you know that x is a number would make no sense. If you talk about -x then that is completely different, people who write -x almost certainly expect it to be a number, and -[] === 0. Unary plus is just not the right example for awful type coercion here.
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I don't think you understand what I am trying to say.
The unary '+' operator is completely pointless if something is already a number, it is a no-op. Literally the only time anyone would ever type +x is if x is not a number, if someone chose to write +x and x turned out to unexpectedly be an array, pretty much the only thing that you know they were thinking of when they wrote the + was that they thought x isn't a number; maybe a string if they were using +x instead of parseFloat(x), but definitely not a number.
It just isn't a reasonable example of a situation where an array is being used where a number should be, +x where you know that x is a number would make no sense. If you talk about -x then that is completely different, people who write -x almost certainly expect it to be a number, and -[] === 0. Unary plus is just not the right example for awful type coercion here.