please discard my previous post – I found out what is wrong. It is not JavaScript, it is iPad which has samoe limitations.

regards Matej

great presentation!
I have a question about Ajax calls. What actually happens with JS exection when Ajax call is invoked?

I’m asking this because I have next problem. When I call function playItem() it normally executes – creates HTML5 video tag and starts to play (function playLiveFlowplayer() createys HTML5 video tag on iPad, on PC it creates Flash player).

function playItem()
{
var playerArea = $(‘#playerArea’);
var fpId = getFlowplayerId();
playerArea.empty();

playerArea.append(createQualityChooserHTML()+”);
clipProperties.url = ‘http://192.168.100.107:1935/ia/live/playlist.m3u8';
playLiveFlowplayer(fpId, getWowzaUrl(‘ia’), ”, ”, true, true);
}

But you can see that url is hardcoded – it has to be assigned by ajax call. So here is what I did:
function playItem()
{
$.ajax({
url : ‘playVODServlet’,
type : ‘GET’,
data : JSON.stringify(playItemParams),
timeout : 5000,
dataType : “json”,
error : function(xhr, ajaxOptions, thrownError)
{
console.error(“Error”);
},
success : function(searchResult)
{
var playerArea = $(‘#playerArea’);
var fpId = getFlowplayerId();
playerArea.empty();

playerArea.append(createQualityChooserHTML()+”);
clipProperties.url = searchResult.assetId;
playLiveFlowplayer(fpId, getWowzaUrl(‘ia’), ”, ”, true, true);

}
});

But now autostart doesn’t work. Do you maybe know why?

Is there any good presentation about Ajax calls? And one more question: if I set interval to 1000 ms if I measure with Date() I get that interval has 998 (or similar) ms of time delay and not 1000 (or more). Can you explain why?

best Matej

since hero.constructor == Hero then
hero.constructor === hero.constructor.prototype.constructor becomes Hero === Hero.prototype.constructor which is true

A function automatically has a prototype property.

So the real question is why is this true

hero.constructor === Hero.prototype.constructor

that is because
hero.__proto__ === Hero.prototype

Hero.prototype.hasProperty(‘constructor’) == true
Hero.prototype.constructor == Hero
hero.constructor == Hero // inherited not actually on hero
hero.hasProperty(‘constructor’) == false;

So the constructor property is inherited from the hero.__proto__ which is the same as the Hero.prototype

var hero = new Hero();
console.log(hero.constructor); //Hero()
console.log(hero.constructor.prototype); // Object{}
—————————————————
hero.constructor === hero.constructor.prototype.constructor; //true

Misko can you explain how the last line evaluated to true?

thanks for your kind words. believe it or not I have never read any JavaScript book.

Reference section citing some of the recent developments makes the presentation more complete.
Curious to know if you have read the book pro javascript design patterns by justina diaz and ross harmes.

I want to thank you for all these beautiful presentations! Keep going.

Indrit

I use jstestdriver for all of my development.
http://code.google.com/p/js-test-driver/

I know you are a big eclipse fan for java dev, are you using mostly browser windows for js dev or another setup?