March 2006
Beginner to intermediate
448 pages
13h 33m
English
Content preview from Head Rush Ajax
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
140
Chapter 3
What does asynchronous really mean?
Asynchronous means that you don’t have to wait around while a web server is responding to
your request. That means you’re not stuck: you can go on doing what you want, and have the
server let you know when it’s nished with your request. Let’s take a view of this from 10,000
feet by rst looking at what a synchronous request is, and compare it to an asynchronous request.
I am
so
craving a Head First cola...
Hey Rufus, will you go GET me a
Head First cola from the store?
Must get cola,
must get cola...
This is your request: you’re
asking your trusty dog
Rufus to go GET you a cola.
A synchronous request for cola
An asynchronous request for cola
You send your request...
Now, compare that to this asynchronous request...
Hey Rufus, will you get me another cola?
Once again, your trusty dog
Rufus goes off with your
request to get your cola.
This time, though, Rufus is
an ASYNCHRONOUS dog....
Like before, you make a
request to Rufus to go
GET you a cola. Except
this time, you tell him he’s
an asynchronous dog.
I’m gonna have to
ask for a pay raise.
More kibble.
what does asynchronous mean?
you’re on your way 4
141
asynchronous applications
Ow, my
back!
Good boy, Rufus! But I gotta make
you an
asynchronous
dog... my back
can’t take this anymore.
...but because ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.