Issue with calling function in swift

Question

I was following optional values tutorial, in which we have following method

  func findIndexOfString (string : String, array : String[]) -> Int?{           
            for (index, value) in enumerate(array){             
                if(value == string){
                    return index
                }               
            }           
            return nil          
        }

however if i call this method by

let indexFound = findIndexOfString("myString", neighbour) //neighbour is array of String

give error that "Missing argument label ''array" in call , means i have to call this by

let indexFound = findIndexOfString("myString", array:neighbour)

Is it made compulsory to mention argument label in call?

Anil Varghese · Accepted Answer · 2014-06-25T06:58:08.207

1

Yeah. It is compulsory for for class methods. You should use the parameter names except for the first parameter. There comes the difference between the class methods and functions, for functions you will not use(You cant unless function defines an external parameter name) the parameter names.

edited Jun 25 '14 at 06:58

answered Jun 25 '14 at 06:46

Anil Varghese

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In tutorial, they could use let indexFound = findIndexOfString("myString", neighbour), without label – BaSha Jun 25 '14 at 06:58
1

If they are using like that, it could be a function(outside of the class) not a method – Anil Varghese Jun 25 '14 at 07:00

Issue with calling function in swift

1 Answers1