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uplearned.com has asked 12 questions and find answers to 12 problems.

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uplearned.com questions

All stored properties of a class instance must be initialized before returning nil from an initializer
Eclipse C/C++ error 1 duplicate symbol for architecture x86_64
Realm = RLMRealm' has no member 'setDefaultRealmPath'
Implicit declaration of function 'sum' is invalid in C99
Machine Learning Error when loading mlmodel "No known class for loading model type > MLModelType_pipelineClassifier"
error Nil default argument value of cannot be converted to type 'NSLayoutFormatOptions'

uplearned.com answers

Xcode UIView.init(frame:) must be used from main thread only
Simple UITableView in Swift - unexpectedly found nil
Xcode 12: Failed to start remote service "com.apple.debugserver" on iOS device
How to make a sprite move up and down forever in swift SpriteKit
When using input function "scanf" in Xcode 4's debugging console
SwiftUI with Core Data getting Blank Screen in simulator in Xcode 12
MFMailComposeViewController error [MC] Filtering mail sheet accounts for bundle ID
Prevent custom keyboard in textfield
Find my custom code snippets Xcode 6?
Why is 'nil' not compatible with 'UnsafePointer<CGAffineTransform>' in Swift 3?