ofClass - richardszalay/raix GitHub Wiki

Filters out values that are not instances of a certain type (or a sub-class of that type)

function ofClass(valueClass : Class) : IObservable.<valueClass>

As values are emitted from the source, they are checked to be instances of valueClass. If the value is an instance of valueClass or a subclass, the value is emitted; otherwise, the value is skipped.

The returned sequence completes when the source sequence completes.

The returned sequence errors when the source sequences errors.

xs = source
ys = output
true = value is instance of 'type'
false = value is not an instance of 'type'

xs  ──o─────o─────o─────o────/
      │     │     │     │    │
     true  false false true  │
      │                 │    │
ys  ──o─────────────────o────/

IObservable.<valueClass>

var source : IObservable = toObservable(
        ["first", 0, 1, 2, "second", "third"])
    .ofType(String);

source.subscribe(function(value : Object) : void
    {
        trace(value);
    });

// Trace output is:
// first
// second
// third