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@pgpt10 pgpt10/DeepShallow3.swift
Last active Jun 10, 2018

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class Address: NSObject, NSCopying
{
var city: String?
init(_ city: String?)
{
self.city = city
}
func copy(with zone: NSZone? = nil) -> Any
{
let address = Address(self.city)
return address
}
}
var a1 = Address("Mumbai")
var a2 = a1.copy() as! Address //This will create a Deep Copy of a1
print(a1.city) //Mumbai
print(a2.city) //Mumbai
a2.city = "Bangalore"
print(a1.city) //Mumbai
print(a2.city) //Bangalore
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