Is apple a fruit? Yes.
Is orange a fruit? Yes.
Is apple an orange? No.

Does apple equal a fruit? No.
Does orange equal a fruit? No.

If you're capable of understanding this, then WHY IS IT IT SO DAMN HARD TO UNDERSTAND 0 == ""?

Reading the manual helps.

"If Type(x) is Number and Type(y) is String,
return the result of the comparison x == ToNumber(y)."

https://ecma-international.org/ecma...

But did you know that chilli pepper is a fruit

Is apple instance of fruit? Yep.

@melezorus34 That's where you may be wrong good sir. The actual fruit of an apple is the apple core.

Class chains apply on instanceof 😛

@melezorus34 Indeed, an Accessory Fruit does not know about seeds so it cannot be a subclass of Fruit, but the instanceOf still works. We have proven that JS is not class oriented then.

Is mayonnaise an instrument?

"is a" is not the same as "equals to".
It looks like your example is just confirming the wrongness of JS.

@Lensflare You mean like the is operator in C#? That would be typeof in js.

@theuser C# does also have typeof() 🙂

Think I get what you're trying to convey, but == is wrong as a comparison operator.

defining, mathematically, how null, 0, "", [], {} and other empty types are exactly empty other than just saying "they just are", is difficult.

Or read this 1980 paper, a foundational work on type theory around implicit conversions in imperative languages: http://cs.cmu.edu/afs/cs/...

Isn't type theory fun?

Anyway, my glass of cognac ∈ ⊥

Wait no, that's impossible, something can't be part of nothing.

Anyway, I'm ∈ drunk people, so my brain is ⊥