Asked By: Dylan Evans Date: created: Jul 05 2021

What is the difference between weak and strong

Answered By: Tyler Harris Date: created: Jul 08 2021

A variable that does not take ownership of an object is known as a weak reference.

strong is the default.

An object remains “alive” as long as there is a strong pointer to it.

A weak reference is set to nil when there are no strong references to the object..

Asked By: Brandon Rodriguez Date: created: Dec 06 2021

What is ARC in Swift

Answered By: Bruce Henderson Date: created: Dec 08 2021

Swift uses Automatic Reference Counting (ARC) to track and manage your app’s memory usage. … ARC automatically frees up the memory used by class instances when those instances are no longer needed.

Asked By: Harold Peterson Date: created: Sep 29 2021

What is a lazy VAR in Swift

Answered By: Owen Long Date: created: Sep 30 2021

Swift has a mechanism built right into the language that enables just-in-time calculation of expensive work, and it is called a lazy variable. These variables are created using a function you specify only when that variable is first requested.

Asked By: Logan Powell Date: created: Jul 21 2022

What is retain cycle in Swift

Answered By: Christopher Diaz Date: created: Jul 22 2022

I. What are retain cycles and memory leaks? A memory leak in iOS is when an amount of allocated space in memory cannot be deallocated due to retain cycles. Since Swift uses Automatic Reference Counting (ARC), a retain cycle occurs when two or more objects hold strong references to each other.

Asked By: Blake Johnson Date: created: Jul 27 2021

Is Alexa weak AI

Answered By: Mason Coleman Date: created: Jul 28 2021

Siri and Alexa could be considered AI, but generally, they are weak AI programs. Even advanced chess programs are considered weak AI.

Asked By: Devin Torres Date: created: Jul 22 2022

Why is IBOutlet weak

Answered By: Howard Alexander Date: created: Jul 24 2022

In Mac development an IBOutlet is usually a weak reference: if you have a subclass of NSViewController only the top-level view will be retained and when you dealloc the controller all its subviews and outlets are freed automatically. UiViewController use Key Value Coding to set the outlets using strong references.

Asked By: Brian Moore Date: created: Dec 30 2021

What is unowned self in Swift

Answered By: Harry Gonzales Date: created: Dec 30 2021

The most common place you’ll see unowned variables is with closures that declare [unowned self] – this means “I want to reference self inside this closure but I don’t want to own it.” Why unowned rather than weak ? Both would work, but let’s face it: if self is nil inside a closure, something has gone wrong!

Asked By: Patrick Brooks Date: created: Sep 23 2021

What is optional in Swift

Answered By: Kyle Bryant Date: created: Sep 23 2021

An optional in Swift is basically a constant or variable that can hold a value OR no value. The value can or cannot be nil. It is denoted by appending a “?” after the type declaration. … This is a big impact on the language Swift itself because what that means is that anything non-optional types can never be nil.

Asked By: Joshua Gray Date: created: May 23 2022

Is Google an AI

Answered By: Neil Ross Date: created: May 26 2022

Google AI is a division of Google dedicated to artificial intelligence….Google AI.IndustryArtificial intelligenceFounded2017OwnerGoogleWebsitewww.ai.google

Asked By: Neil Kelly Date: created: Aug 01 2022

What is closure in Swift

Answered By: Zachary Henderson Date: created: Aug 04 2022

Closures are self-contained blocks of functionality that can be passed around and used in your code. Closures in Swift are similar to blocks in C and Objective-C and to lambdas in other programming languages. … Nested functions are closures that have a name and can capture values from their enclosing function.

Asked By: Simon James Date: created: Feb 05 2022

Why delegates are weak iOS

Answered By: Lawrence Carter Date: created: Feb 08 2022

For delegation patters in iOS, the delegated object is the parent, because there is no need for the delegate caller to exist without the delegated object. … When you define a delegate object as property, it’s used a weak reference in the object it is defined in(lets say A, i.e. the delegate object is a property of A).

Asked By: Antonio Hernandez Date: created: May 25 2022

What does weak mean in Swift

Answered By: Clifford Griffin Date: created: May 27 2022

A weak reference is just a pointer to an object that doesn’t protect the object from being deallocated by ARC. While strong references increase the retain count of an object by 1, weak references do not. In addition, weak references zero out the pointer to your object when it successfully deallocates.

Asked By: Curtis Ross Date: created: Aug 13 2022

What is strong reference in Swift

Answered By: Caleb Moore Date: created: Aug 14 2022

Strong Reference Cycle. In essence, strong references are used to describe the relationship between objects. When an object has a strong reference to another object, this creates a retain cycle that prevents the object that is being referenced from being deallocated and increases the retain count to 1.

Asked By: Carter Cook Date: created: Jan 23 2022

Why outlets are weak in Swift

Answered By: Kevin Bailey Date: created: Jan 26 2022

weak is used because in most situations the owner of the outlet isn’t the same as the owner of the view. For example, a view controller doesn’t own someLabel – the view controller’s view does. var because outlets are, by definition, set after initialization.

Asked By: Xavier Campbell Date: created: Nov 09 2021

What is @IBOutlet

Answered By: Ryan Baker Date: created: Nov 12 2021

“IBAction” is used by in place of the “return type” void for a method that receives an event sent from Interface Builder. The IBAction keyword allows the programmer to connect the source code to user interface objects in Interface Builder. Neither IBOutlet or IBAction affect how the code is compiled.

Asked By: Xavier Perez Date: created: Aug 06 2022

What is retain count in Swift

Answered By: Ronald Ramirez Date: created: Aug 08 2022

Retain Count represents number of owners for a particular object. It is zero till object does not have any owners. Increase in one ownership claim will cause retain count to increase by 1 and decrease will cause it to decrement by 1. Example: – Class A object is created using alloc/init and retain count is 1.

Asked By: Connor Rodriguez Date: created: Sep 12 2021

Is Siri an AI

Answered By: Brandon James Date: created: Sep 14 2021

Siri is the AI-based voice assistant available across all Apple devices, comparable to Amazon Alexa and Google’s google assistant.

Asked By: Gerld Cooper Date: created: Aug 03 2022

What is the difference between weak and unowned

Answered By: Cyrus Cook Date: created: Aug 06 2022

The first difference you need to know about is that an unowned reference is always expected to have a value. … When that happens, the reference is set to nil . Because a weak reference can be set to nil , it is always declared as an optional. That is the second difference between weak and unowned references.

Asked By: Matthew Lopez Date: created: Jan 12 2022

What is computed property in Swift

Answered By: Samuel Barnes Date: created: Jan 12 2022

Swift offers us two kinds of property: a stored property is one that saves a value for use later, and a computed property is one that runs some code in order to calculate the value. … The computed property returns a string based on joining the four stored properties into a sentence.

Asked By: Blake Miller Date: created: Jan 08 2022

Why is Siri an AI

Answered By: Robert Miller Date: created: Jan 10 2022

Siri relies on natural language generation, natural language processing, and machine learning in order to effectively operate and improve its performance over time.

Asked By: Horace Lopez Date: created: Mar 22 2022

What is a mutating function in Swift

Answered By: Cyrus Howard Date: created: Mar 24 2022

It clearly states that adding mutating keyword to any function in value type can enable them to modify the variable. … Internally when we try to mutate the value type, it does not mutate its value but it mutates the variable holding that value.

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