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Boris Likhobabin
3,581 PointsWhy argument name title is not used?
***swift
extension Page {
func addChoice(title: String, story: Story) -> Page {
let page = Page(story: story)
return addChoice(title, page: page)
}
func addChoice(title: String, page: Page) -> Page {
switch (firstChoice, secondChoice) {
case (.Some, .Some): break
case (.None, .None), (.None, .Some): firstChoice = (title, page)
case (.Some, .None): secondChoice = (title, page)
}
return page
}
}
Why in the first addChoice function when we return the second (addChoice(title: String, page: Page)) we don't write the name for the title argument like this : return addChoice(title: title, page: page) ? If I do it this way I get an error "extraneous argument label 'title' in call.
Alternatively why do we need to use page: page instead of just page? In this case the error is missing argument.
So why are these two arguments treated differently? so I'm confused.
1 Answer
Florian Thompson
Courses Plus Student 18,609 PointsHi Boris, the first parameter name is inferred. You if you want to use the first name like addChoice(title: ... ) your addChoice function needs a named parameter.
Which would look like : func addChoice(title title: String, page: Page)
Hope that helped