Unable to append String to array in Swift

Question

So I am using this code and I get the error: Immutable value of type 'Array' only has mutating members named 'append.' I have been unable to find any working solutions as of yet.

import Foundation
struct Roster
{
    var names: Array<String>  = []

    func add(name: String) {
        names.append(name)
    }
}

Thank you!

Sandeep · Accepted Answer · 2015-06-11 20:35:20Z

3

As the rule of immutable struct in swift, if you want to be able to modify the properties inside a method, you have to mark the method as mutating.

struct Roster
{
    var names: Array<String>  = []

    mutating func add(name: String) {
        names.append(name)
    }
}

answered Jun 11, 2015 at 20:35

Sandeep

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