CODEWITHSUNDEEP
swiftvapor
Arsen Gaming
Arsen Gaming

Reputation: 1

Swift Array elements to variables

I am making a web application in Vapor.

I have an array of things, e.g :

["thing", "other thing", "third thing"]

I want to make empty string variables with the same names but " " replaced with "+" in a struct.

I cannot use a dictionary or an array as vapor wants individual variables in strings. The reason I cannot write them all manually is that I want to be able to add things to my array and not have to also add them somewhere else.

I can do the replacing by myself, I just need to know if it is possible to make variables out of the array elements.

I am new to Swift, I do not know where to start.

Thanks for helping

Upvotes: 0

Views: 212

Answers (2)

GrandFelix
GrandFelix

Reputation: 551

I hope I understand you correctly. You could use @dynamicMemberLookup to dynamically look for struct/class property. Here is an example but I don't know exactly where is your purpose to use this and if this would help you.

import Foundation

let replaced = ["thing", "other thing", "third thing"].map {$0.replacingOccurrences(of: " ", with: "_")}

@dynamicMemberLookup
struct User {
    subscript(dynamicMember m: String) -> String? {
        if replaced.contains(m) {
            return "soemthing for that thing"
        }

        return nil
    }
}

let u = User()
print(u.other_thing)
print(u.thinga)

Because + is not allowed in property names you must use _ insetad. If you realy want to access it with + you could do it with print(u[dynamicMember: "other+thing"]). To use this you must also replace $0.replacingOccurrences to replace " " with +.

Here is some more info about @dynamicMemberLookup https://docs.swift.org/swift-book/ReferenceManual/Attributes.html

Upvotes: 0

mag_zbc
mag_zbc

Reputation: 6992

let array = ["thing", "other thing", "third thing"]
let newArray = array.map { $0.replacingOccurrences(of: " ", with: "+") }

print(newArray)
// ["thing", "other+thing", "third+thing"]

Upvotes: 2

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