Swift - How to get the index of an array that has an initializer?

Question

I am making an IOS app and I use swift. I have an array that I need in order to retrieve data from my CoreData database.

 var myList : Array<AnyObject> = []

This "myList" array has an item called "Monday". I want to get the index of this item. I tried to use this to get the index, but it doesn't work.

find(daysOfWeek, "c")!

It gives me an error 'Genetic Paramater cannot be bound to non-@object protocol 'AnyObject''

This find method works fine for normal arrays like this:

var daysOfWeek = ["Monday", "Tuesday"]

How can I get the index of an item for my myList array?

Lyndsey Scott · Accepted Answer · 2015-03-25 04:57:52Z

1

As the error states, find can't work with AnyObject; so although this won't work:

var myList : Array<AnyObject> = []

find(myList, "c")

this will:

var myList : Array<String> = []

find(myList, "c")

Since you're searching for a string, making myList into an array of Strings should be sufficient.

answered Mar 25, 2015 at 4:57

Lyndsey Scott

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TamilKing · Accepted Answer · 2015-03-25 04:49:36Z

0

var shoppingList:Array = ["Chocolate Spread", "Cheese", "Butter"]

var indexOfObject = 0

for var index = 0; index < shoppingList.count ; index++ {
if "Butter" == shoppingList[index] {
    indexOfObject = index
}
}

println("Butter index is \(indexOfObject)")

I hope this ll help you to find the index of the object.. I don't there is any function to get index directly bt now i use like above only..

answered Mar 25, 2015 at 4:49

TamilKing

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1 Comment

Marton Zeisler Over a year ago

Yes it works with a simple array but I have a different array, it's an anyobject array: var myList : Array<AnyObject> = []

newacct · Accepted Answer · 2015-03-25 19:49:54Z

0

In any case, find requires a type that conforms to Equatable (i.e. has ==). == is not defined on AnyObject (there is no general definition of value equality on objects). However, == is defined on NSObject:

import Foundation
var myList : [NSObject] = []
find(myList, "c")

answered Mar 25, 2015 at 19:49

newacct

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