swift 1.2 if loop to switch statement

Question

I have the following If-Statment and I was wondering how this could be achieved with a switch statement?

I am trying to represent an integer value within an array as a string (e.g. 1 == "Jan")

func assigningMonthName([Data]) {
    for i in dataset.arrayOfDataStructures {
        if (i.month) == 1 {
            println("Jan")
        }
        else if (i.month) == 2 {
            print("Feb")
        }
        else if (i.month) == 3 {
            print("March")
        }
        else if (i.month) == 4 {
            print("April")
        }
        else if (i.month) == 5 {
            print("May")
        }
        else if (i.month) == 6 {
            print("June")
        }
        else if (i.month) == 7 {
            print("July")
        }
        else if (i.month) == 8 {
            print("August")
        }
        else if (i.month) == 9 {
            print("September")
        }
        else if (i.month) == 10 {
            print("October")
        }
        else if (i.month) == 11 {
            print("November")
        }
        else if (i.month) == 12 {
            print("December")
        }
        else {
            println("Error assigning month name")
        }
    }

}

any answers would be appreciated :)

Just a suggestion, find a way to get month from Int by using NSDate. It will make your life easier than use if else or switch case — t4nhpt
– t4nhpt, Commented Oct 19, 2015 at 8:22

Sulthan · Accepted Answer · 2015-10-19 08:33:04Z

2

While you can use a switch, this is essentially just another way to write if-else so there is no big improvement to your code:

switch i.month {
    case 1:
        print("Jan")
    case 2:
        print("Feb")
    ...
}

What about using an array?

let monthNames = ["January", "February", "March", "April", "May", "June", "July", "August", "Sept", "October", "November", "December"]
print(monthNames[i.month - 1])

The system actually already contains month names, they are even localized:

let monthNames = NSDateFormatter().monthSymbols;
print(monthNames[i.month - 1])

answered Oct 19, 2015 at 8:33

Sulthan

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2 Comments

Jess Murray Over a year ago

Thanks! this makes a lot of sense. I have created an empty string within the arrayofdatastructures called 'monthValue', if i wanted to insert the written month. I tried 'i.monthName.insert(monthNames[i.month - 1])' however i got the error 'immutable value of type string only has mutating members named insert'

Sulthan Over a year ago

@JessMurray That's a bit different question. Probably you want to create a new string (e.g. using String(format: ...) and assign that instead of modyfing an already existing string.

Orkhan Alizade · Accepted Answer · 2015-10-19 07:51:03Z

1

Try this:

switch i.month {
    case 1:
        print("Jan")
    case 2:
        print("Feb")
    ...
    default:
        print("default value")
}

answered Oct 19, 2015 at 7:51

Orkhan Alizade

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