Swift Interview Questions And Answers part 1

​An NSMutableArray is an NSArray is a subclass of NSArray.But,we can really
​another immutable instance by the following way.In this post, I have shared some examples - how to turn a swift Array to Mutable Array or vice versa.This is my first article in swift for the beginners.Feel free to share your comments.

1.How to convert NSMutableArray to Swift Array in swift?
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Answer:
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var myMutableArray = NSMutableArray(array: ["xcode", "eclipse", "net bins"])

​var myswiftArray = myMutableArray as NSArray as! [String]

2.How to convert NSArray to NSMutableArray in swift?

Answer:

We can convert the SwiftArray to a MutableArray by using the following code.

let myArray: NSArray = ["iOS","Android","PHP"]
var myMutableArray = NSMutableArray(array:myArray)

print(myMutableArray)


3.How to convert an array of characters into string in Swift without using any separator?

Answer:

let SwiftCharacterArray: [Character] = ["a", "b", "c", "d"]
let SwiftString = String(characterArray)

print(SwiftString)

4.How to convert an array of Strings into a string in Swift without using any separator?
Answer:

let SwiftStringArray = ["cocos2d", "cocos2d-x", "UIKit"]
 let SwiftCharacterArray = SwiftStringArray.flatMap   { String.CharacterView($0) }
 let SwiftString = String(SwiftCharacterArray)

 print(SwiftString)


5.How to convert an array of Strings into a string in Swift using space as separator?
Answer:

let SwiftStringsArray = ["Model", "View", "Controller"]
let MySwiftString = SwiftStringsArray.joinWithSeparator(" ")

print(MySwiftString)



6.How to convert an array of Strings into a string in Swift using separator?
Answer:

let SwiftStringsArray = ["iPhone", "iPad", "iPod"]
let MySwiftString = SwiftStringsArray.joinWithSeparator(",")
print(MySwiftString)


6.How to convert Swift String into an Array?
Answer:

let Ustring : String = "iOS Developer Questions"
let characters = Array(Ustring.characters)
print(characters)

Read:
An Introduction To The Swift Programming Language
Swift 2 Tutorial Part 2: Basics
How to Integrate Google Signin SDK in iOS Application using Swift 
How To Add  A SWIFT Bridging Header in iOS


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