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iOS Swift Functions and Optionals Optionals What is an Optional?

Posted by joshuawalliy
joshuawalliy
1,131 Points

I understand how to code but what's the error?

error: swift_lint.swift:15:16: error: '(StringLiteralConvertible) -> $T2' is not identical to 'String' if let n = name ("Snow White"){ ^

search.swift 
func search(#name: String) -> String? {
    let names = ["Doc","Grumpy","Happy","Sleepy","Bashful","Sneezy","Dopey"]
    for n in names {
        if n == name {
            return n
        }
    }
    return "nil"
    if let n = name ("Snow White"){
    println("Found")
    }
}

2 Answers

Jhoan Arango
Jhoan Arango
14,575 Points
Jhoan Arango
Jhoan Arango
14,575 Points

Hey Josh:

You are not calling the function.

This is what you are looking for to pass the challenge. 

func search(name name: String) -> String? {
    let names = ["Doc","Grumpy","Happy","Sleepy","Bashful","Sneezy","Dopey"]
    for n in names {
        if  n == name {
            return n
        }
    }
    return nil
}

if let result = search(name: "Doc") {
    println("Found")
}

The challenge wants you to use the if let statement, with a constant named "result", and then call the function with "Doc".

joshuawalliy
joshuawalliy
1,131 Points

I was looking at the track for the rest of IOS development. I saw that there are teachers. Why?

joshuawalliy
joshuawalliy
1,131 Points
joshuawalliy
joshuawalliy
1,131 Points

There are two different teachers.

Jhoan Arango
Jhoan Arango
14,575 Points
Jhoan Arango
Jhoan Arango
14,575 Points

Well, there are different. Amit, was the initial teacher for the Swift 1.2 courses, but for Swift 2.0 Pasan took over, because Amit is no longer teaching, he is now in a different position in treehouse.