Array.filter with inline regex

Question

I'm writing a function that given an array of objects that contain a property called url, remove all objects with bad urls.

Here's what I have:

func cleanArray(data:[String: Any])->Void {
   let uris = data.filter{($0["url"] as! String).range(of: #"^(https?|file|ftp)"#, options: .regularExpression) != nil };
}

But xcode is showing an error in $0:

Value of tuple type '(key: String, value: Any)' has no member 'subscript'

To check that a string is a valid URL, have a look here stackoverflow.com/questions/28079123/… — ielyamani
– ielyamani, Commented Sep 10, 2019 at 11:44
You shouldn't do URL operations like this on a raw String. You should extract the data from your dictionary into structs, and perform this validation in the initializer of your struct. Your code doesn't even need a regex. It would be much simpler if just used the URL API, which would allow you to write: ["http", "https", "file", "ftp"].contains(url.scheme) — Alexander
– Alexander, Commented Sep 10, 2019 at 12:58

Shehata Gamal · Accepted Answer · 2019-09-10 11:53:04Z

2

[String: Any] is a dictionary , You need [[String: Any]]

func cleanArray(data:[[String: Any]]) -> Void { 
    let uris = data.filter{ ($0["url"] as! String).range(of: #"^(https?|file|ftp)"#, options: .regularExpression) != nil };
}

This could be more object oriented if you make it an array of a model

edited Sep 10, 2019 at 11:53

answered Sep 10, 2019 at 11:34

Shehata Gamal

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