Cannot call value of non-function type 'String'

Question

I\'m trying to pass the ILTItem variable into my ILTViewController, triggered by AppDelegate.swift when the user launches my app via a deeplink.

The code I have erro

Answer 1

Works:

let works = ["foo", "bar"].first(where: { ($0 == "foo") } )
let works = ["foo", "bar"].first(where: { (_ in true) } )

Fails:

let fails = ["foo", "bar"].first(where: { (true) } )

// Cannot call value of a non-function type 'String?'

You must be sure to use the parameter ($0 or _ in) in the closure expression.

Use _ in or $0 to discard or reference the parameter. You cannot simple move directly into the closure body and return true or you will receive this (extremely unhelpful) error.