Objective-C code (array.indexOfObjectPassingTest) to Swift - objective-c

Question

How can I use the Objective-C code below in Swift, I tried but something is wrong.
Objective-C:
NSUInteger index = [theArray indexOfObjectPassingTest:
^BOOL(NSDictionary *dict, NSUInteger idx, BOOL *stop)
{
return [[dict objectForKey:#"name"] isEqual:theValue];
}
];
Swift (Doesn't work):
let index = theArray.indexOfObjectPassingTest { (var dict: NSDictionary, var ind: Int, var bool: Bool) -> Bool in
return dict.objectForKey("name")?.isEqual("theValue")
}

Answer 1

I played with it and got this to work:
let theArray: NSArray = [["name": "theName"], ["name": "theStreet"], ["name": "theValue"]]
let index = theArray.indexOfObjectPassingTest { (dict, ind, bool) in return dict["name"] as? String == "theValue" }
if index == NSNotFound {
print("not found")
} else {
print(index) // prints "2"
}
This can be further reduced. As #newacct mentioned in the comment, the return can be dropped since the closure is only a single line. Also, _ can be used in place of the parameters that aren't being used:
let index = theArray.indexOfObjectPassingTest { (dict, _, _) in dict["name"] as? String == "theValue" }
You can get rid of the parameter list in the closure entirely and use the default $0 value. Note in that case, the three parameters are combined as a tuple, so the first value of the tuple dict is referenced as $0.0:
let index = theArray.indexOfObjectPassingTest { $0.0["name"] as? String == "theValue" }

Answer 2

Swift 3:
Consider this method:
public func index(where predicate: (Element) throws -> Bool) rethrows -> Int?
The following gives you an example how to use it:
let dict1 = ["name": "Foo"]
let dict2 = ["name": "Doh"]
let array = [dict1, dict2]
let index = array.index { (dictionary) -> Bool in
return dictionary["name"] == "Doh"
}
This returns the value 1.
Hope that helps

Answer 3

Guess you need this:
var index: UInt = theArray.indexOfObjectPassingTest({(dict: [NSObject: AnyObject], idx: UInt, stop: Bool) -> BOOL in return dict.objectForKey("name").isEqual(theValue)
})

Answer 4

I ended up using this for a Swift5 project:
let index = self.info.indexOfObject(passingTest: { (obj:Any, ind:Int, stop:UnsafeMutablePointer<ObjCBool>) -> Bool in
if let details = obj as? NSDictionary, let id = details["id"] as? Int
{
if (orderId == id)
{
stop.pointee = true
return true
}
}
return false;
})
Where orderId is id value of the object I wanted to find.