How to get a property of a tuple with a string?-CodePudding

I'm starting in Swift, I come from JavaScript, and some things are a bit confusing for me, is there something similar to this in Swift?:

JS:

var user = {name: "Chris Answood"}
user["name"]

CodePudding user response：

In Swift, you can use a struct or class to create an object with properties, similar to an object literal in JavaScript. Here's an example of creating an object with a "name" property in Swift:

struct User {
    let name: String
}

let user = User(name: "Chris Answood")
print(user.name) // Output: "Chris Answood"

You can also use a Dictionary in Swift, which is similar to a JavaScript object. Here is an example:

var user = ["name": "Chris Answood"]
print(user["name"]) // Output: Optional("Chris Answood")

Note that the value returned by the Dictionary is an Optional, you can use if let or guard let to unwrap the value.

CodePudding user response：

JavaScript doesn't have built-in tuple support. You just created an object and get the value of the name property inside this object. You have used user["name"] but user.name would also be possible.

To achieve this in Swift you can create a struct:

struct User {
    name: String
}

let user = User(name: "Chris Answood")
print(user.name)

Unlike JavaScript, Swift has support for tuples. This is an easy example:

let user = (firstName: "Chris", lastName: "Answood")
print(user.firstName)