iOS Swift: Find index for CKRecord in array - ios

Question

I'm trying to use the find function to get the index of a CKRecord in an array. However I'm running into a problem that I don't understand.
I have two arrays: notes and allNotes. notes is a subset of allNotes. I have an item from notes and I'm trying to find its index within allNotes. As you can see from the output it exists in both arrays, but its only being found in the notes array.
func removeNoteAtIndexPath(indexPath: NSIndexPath) {
let note = tableViewController.notes[indexPath.row]
if let index = find(allNotes, note) {
println("Found in allNotes")
} else {
println("Not found in allNotes")
}
if let index = find(tableViewController.notes, note) {
println("Found in notes")
} else {
println("Not found in notes")
}
println(tableViewController.notes[0])
println(allNotes[0])
}
Console output
Not found in allNotes
Found in notes
<CKRecord: 0x7fb49ad37120; recordType=Note, recordID=E6BD60A1-AB15-4952-84A3-81BDB4DFC961:(_defaultZone:__defaultOwner__), recordChangeTag=i8nh54t3, values={
Text = "My note";
}>
<CKRecord: 0x7fb49ac31f60; recordType=Note, recordID=E6BD60A1-AB15-4952-84A3-81BDB4DFC961:(_defaultZone:__defaultOwner__), recordChangeTag=i8nh54t3, values={
Text = "My note";
}>

Answer 1

You need to adapt Equatable protocol to CKRecord like below.
extension CKRecord: Equatable {}
public func
==( lhs: CKRecord, rhs: CKRecord ) -> Bool {
return lhs.recordID.recordName == rhs.recordID.recordName
}

Answer 2

I like Satachito's answer better, but this was my initial solution:
func findCKRecord(records: [CKRecord], record: CKRecord) -> Int? {
var index: Int?
let recordID = record.recordID
for (i, record) in enumerate(records) {
let currentRecordID = record.recordID
if recordID == currentRecordID {
index = i
}
}
return index
}