What is a deep copy? - Cracking the Java Coding Interview

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Cracking the #Java #Coding #Interview - Question 142: What is a deep copy?
  1. Java
  2. Java programming language
  3. Java
  4. JDK
  5. JVM
  6. Java virtual machine
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Комментарии
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While implementing a Conway's game of Life in Java I had the darndest time trying to figure out why me making a copy of an array was giving me such a hard time.

It was because I was only making copies of the array itself and not deep copying the nested arrays. State[][]

Lesson learned! Haha.

Gennys
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The way he explains is a dream.. never found anyone who explained with such smile and calmness.

AkhileshKumar-xqul
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I'm addicted to your channel. Can't wait for the next upload!

MyCodingDiary
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Awesome, ex deep copy through constructure and shadow cope through setter based

BSReddy
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Nit: List.copyOf() doesn't check if a list is non-modifiable, it checks if the list is immutable.

"Non-modifiable" can have a different connotation in Java, since the Collections.unmodifiableX() factory methods return unmodifiable **views**. The state of an unmodifiable view **can change**. It's just that changes cannot be made via the unmodifiable view, but code that holds a reference to the backing collection can indeed make changes to it.

This is why immutable collections are different. List.of() and List.copyOf() return immutable collections. returns unmodifiable views.

roge
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Simply deep copy creates an object inheritance

whiz-code
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Next question that arises in my mind is, how deep the deep copy should go?

JavierFausLlopis