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Select the syntax(s) with an error in this example that sorts an array of integers
Author: Smart&SoftStatus: PublishedQuestion passed 430 times
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Swift: What is the output of the following code? `var x = 10; x = x + undefined; print(x)`0
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Is the following code valid?
```
var x = 10
var y = x
```1
Use dispatch_once from Grand Central Dispatch,Declare the portion of code whose result is stored in a static let in Swift.