bool
=== (
α
 
_
, 
α
 
_)
Physical equality.This operator is for advanced uses, as it compares memory addresses of two objects.
Unless you know what you are doing, chances are that you should rather use operator
`==`.a===b produces true if and only if a and b are the same object -- not just if
they are equal. For instance,
a = {blue}; a === a returns true, while"blue" === "blue" will probably return false. Note that circumstances beyond the control
of the developer may alter the physical equality of two objects: compiler optimizations may
transform two immutable identical objects into one, while concurrency or distribution may
cause an object to be duplicated transparently.

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