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Home>IT Tests>Questions>Use dispatch_once from Grand Central Dispatch,Declare the portion of code whose result is stored in a static let in Swift.

Question from the Swift test

Use dispatch_once from Grand Central Dispatch,Declare the portion of code whose result is stored in a static let in Swift.

Hard

How do you ensure that a portion of code is executed once and only once?

Author: Smart&SoftStatus: PublishedQuestion passed 379 times
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