J.Util.Proxy.Idx.O

Returns element at specified position

 val idx: Idx[Char] = ('A' <> 'Z').stream.pack

 idx(1).tp // Prints: B

 idx(4).tp // Prints: E

On element add

Subscribes given function to element add event

val co: Collection.ObservableMutable[Int] = Collection.OM[Int]()

co.onAdd("Added: "+ _ tp())

co ++= 1 <> 3

// Output
Added: 1
Added: 2
Added: 3

On event

Subscribes given function to all element changes

val idx: Idx.OM[Int] = Idx.OM[Int]()

idx.onChange(_.stream.tp)

idx ++= 1 <> 5

idx(2) = 22

idx.removeRange(3 <> 4)

idx.stream.tp

// Output
Stream(IdxChange{type=Add,range=0 <> 4,items=[1,2,3,4,5]})
Stream(IdxChange{type=Update,range=2 <> 2,items=22,oldItems=3})
Stream(IdxChange{type=Remove,range=3 <> 4,items=[4,5]})
Stream(1, 2, 22)

On element remove

Subscribes given function to element remove event

val co: Collection.ObservableMutable[Int] = Collection.OM[Int]()

co.onRemove("Removed: "+ _ tp())

co ++= 1 <> 10

co --= 5 <> 7

// Output
Removed: 7
Removed: 6
Removed: 5

Stream elements

Returns a stream of all collection elements

Unless specifically defined, the order must be assumed as random

  val c = Collection(1,3,5,7)
  c.stream.tp

  // Output
  Stream(1, 3, 5, 7)