How to create a BindingSeq[T] from a Binding[Seq[T]]

Question

I have a Binding[Seq[T]].

I want to create a BindingSeq[T] in a way that, whenever I change the Seq the BindingSeq will change in the same way.

How can I do this?

What exactly do you mean by the latter part of your question? Do you want `BindingSeq` to change if you change the `Seq` stored in your first variable, or if you change something inside the mutable `Seq` itself? I don't think the latter is possible. — Adowrath, Feb 14 '18 at 08:34

Yang Bo · Accepted Answer · 2018-02-14T17:32:33.577

You can convert a Binding[Seq[T]] to a BindingSeq[T].

def convert1[T](bindingOfSeq: Binding[Seq[T]]): BindingSeq[T] = {
  Constants(bindingOfSeq).flatMap { bindingOfSeq =>
    Constants(bindingOfSeq.bind: _*)
  }
}

or

def convert2[T](bindingOfSeq: Binding[Seq[T]]): BindingSeq[T] = {
  SingletonBindingSeq(bindingOfSeq).flatMap { seq =>
    Constants(seq: _*)
  }
}

However, the Seq, if it is a mutable Seq, has no magic data-binding ability.

When you change the content of the Seq, nothing happens.

How to create a BindingSeq[T] from a Binding[Seq[T]]

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