function getRandomIntInclusive(min, max) {
  return Math.floor(Math.random() * (max - min + 1)) + min;
}

var enableClicks = $("#enable").asEventStream("click");
var disableClicks = $("#disable").asEventStream("click");

// Use .map to create a stream with more sensible values than jquery events
var enableStream = enableClicks.map(function(x) {return getRandomIntInclusive(1,10);});

var disableStream = disableClicks.map(function(x) {return getRandomIntInclusive(1000,10000);});

// Use .merge to join the two streams together
var combinedStream = enableStream.merge(disableStream);

// Use .onValue to enable or disable the
// textarea
combinedStream.onValue(function(x) {
  console.log("number from result stream:",  x);
  if (x>10)
    $("#target").prop( "disabled", true );
    });