var requestStream = Rx.Observable.just('https://api.github.com/users');

requestStream.subscribe(function(requestUrl) {
  // execute the request
  jQuery.getJSON(requestUrl, function(responseData) {
    // ...
  });
}

requestStream.subscribe(function(requestUrl) {
  // execute the request
  var responseStream = Rx.Observable.create(function (observer) {
    jQuery.getJSON(requestUrl)
    .done(function(response) { observer.onNext(response); })
    .fail(function(jqXHR, status, error) { observer.onError(error); })
    .always(function() { observer.onCompleted(); });
  });

  responseStream.subscribe(function(response) {
    // do something with the response
  });
}

var responseMetastream = requestStream
  .map(function(requestUrl) {
    return Rx.Observable.fromPromise(jQuery.getJSON(requestUrl));
  });

var responseStream = requestStream
  .flatMap(function(requestUrl) {
    return Rx.Observable.fromPromise(jQuery.getJSON(requestUrl));
  });

responseStream.subscribe(function(response) {
  // render `response` to the DOM however you wish
});

var requestStream = Rx.Observable.just('https://api.github.com/users');

var responseStream = requestStream
  .flatMap(function(requestUrl) {
    return Rx.Observable.fromPromise(jQuery.getJSON(requestUrl));
  });

responseStream.subscribe(function(response) {
  // render `response` to the DOM however you wish
});

var refreshButton = document.querySelector('.refresh');
var refreshClickStream = Rx.Observable.fromEvent(refreshButton, 'click');

var requestStream = refreshClickStream
  .map(function() {
    var randomOffset = Math.floor(Math.random()*500);
    return 'https://api.github.com/users?since=' + randomOffset;
  });

var requestOnRefreshStream = refreshClickStream
  .map(function() {
    var randomOffset = Math.floor(Math.random()*500);
    return 'https://api.github.com/users?since=' + randomOffset;
  });

var startupRequestStream = Rx.Observable.just('https://api.github.com/users');

var requestOnRefreshStream = refreshClickStream
  .map(function() {
    var randomOffset = Math.floor(Math.random()*500);
    return 'https://api.github.com/users?since=' + randomOffset;
  });

var startupRequestStream = Rx.Observable.just('https://api.github.com/users');

var requestStream = Rx.Observable.merge(
  requestOnRefreshStream, startupRequestStream
);

var requestStream = refreshClickStream
  .map(function() {
    var randomOffset = Math.floor(Math.random()*500);
    return 'https://api.github.com/users?since=' + randomOffset;
  })
  .merge(Rx.Observable.just('https://api.github.com/users'));

var requestStream = refreshClickStream
  .map(function() {
    var randomOffset = Math.floor(Math.random()*500);
    return 'https://api.github.com/users?since=' + randomOffset;
  })
  .startWith('https://api.github.com/users');

var requestStream = refreshClickStream.startWith('startup click')
  .map(function() {
    var randomOffset = Math.floor(Math.random()*500);
    return 'https://api.github.com/users?since=' + randomOffset;
  });

refreshClickStream.subscribe(function() {
  // clear the 3 suggestion DOM elements 
});

var suggestion1Stream = responseStream
  .map(function(listUsers) {
    // get one random user from the list
    return listUsers[Math.floor(Math.random()*listUsers.length)];
  });

suggestion1Stream.subscribe(function(suggestion) {
  // render the 1st suggestion to the DOM
});

var suggestion1Stream = responseStream
  .map(function(listUsers) {
    // get one random user from the list
    return listUsers[Math.floor(Math.random()*listUsers.length)];
  })
  .merge(
    refreshClickStream.map(function(){ return null; })
  );

suggestion1Stream.subscribe(function(suggestion) {
  if (suggestion === null) {
    // hide the first suggestion DOM element
  }
  else {
    // show the first suggestion DOM element
    // and render the data
  }
});

var suggestion1Stream = responseStream
  .map(function(listUsers) {
    // get one random user from the list
    return listUsers[Math.floor(Math.random()*listUsers.length)];
  })
  .merge(
    refreshClickStream.map(function(){ return null; })
  )
  .startWith(null);

var close1Button = document.querySelector('.close1');
var close1ClickStream = Rx.Observable.fromEvent(close1Button, 'click');
// and the same for close2Button and close3Button

var requestStream = refreshClickStream.startWith('startup click')
  .merge(close1ClickStream) // we added this
  .map(function() {
    var randomOffset = Math.floor(Math.random()*500);
    return 'https://api.github.com/users?since=' + randomOffset;
  });

var suggestion1Stream = close1ClickStream
  .combineLatest(responseStream,             
    function(click, listUsers) {
      return listUsers[Math.floor(Math.random()*listUsers.length)];
    }
  )
  .merge(
    refreshClickStream.map(function(){ return null; })
  )
  .startWith(null);

var suggestion1Stream = close1ClickStream.startWith('startup click') // we added this
  .combineLatest(responseStream,             
    function(click, listUsers) {l
      return listUsers[Math.floor(Math.random()*listUsers.length)];
    }
  )
  .merge(
    refreshClickStream.map(function(){ return null; })
  )
  .startWith(null);

var refreshButton = document.querySelector('.refresh');
var refreshClickStream = Rx.Observable.fromEvent(refreshButton, 'click');

var closeButton1 = document.querySelector('.close1');
var close1ClickStream = Rx.Observable.fromEvent(closeButton1, 'click');
// and the same logic for close2 and close3

var requestStream = refreshClickStream.startWith('startup click')
  .map(function() {
    var randomOffset = Math.floor(Math.random()*500);
    return 'https://api.github.com/users?since=' + randomOffset;
  });

var responseStream = requestStream
  .flatMap(function (requestUrl) {
    return Rx.Observable.fromPromise($.ajax({url: requestUrl}));
  });

var suggestion1Stream = close1ClickStream.startWith('startup click')
  .combineLatest(responseStream,             
    function(click, listUsers) {
      return listUsers[Math.floor(Math.random()*listUsers.length)];
    }
  )
  .merge(
    refreshClickStream.map(function(){ return null; })
  )
  .startWith(null);
// and the same logic for suggestion2Stream and suggestion3Stream

suggestion1Stream.subscribe(function(suggestion) {
  if (suggestion === null) {
    // hide the first suggestion DOM element
  }
  else {
    // show the first suggestion DOM element
    // and render the data
  }
});