Find maximum number in an NSMutablearray iOS swift

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 Problem:

I had Nsmutablearray with multiple values in nsnumber format.I want to get the maximum number in that array.How can i get that?

Solution: 

            var maxHeight = myArray.map { CGFloat($0 as! NSNumber) }.max() ?? 40


Here i had myArray is my mutable array with dynamic type.But it had Nsnumber array.So i added as conditional.

maxHeight is float value so i converted nsnumber to cgfloat like

CGFloat($0 as! NSNumber) 

Also assigned to  maxheight variable.But it shows error that to apply conditional.But i had added that default value as 40.So it will never throw exception

max() function for fetching max value in that array...

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