Entries:
Comments:
Posts:

Loading User Information from Channel 9

Something went wrong getting user information from Channel 9

Latest Achievement:

Loading User Information from MSDN

Something went wrong getting user information from MSDN

Visual Studio Achievements

Latest Achievement:

Loading Visual Studio Achievements

Something went wrong getting the Visual Studio Achievements

Part 9: Understanding JavaScript Async Promises

Download

Right click “Save as…”

In this lesson, we backtrack and learn about the Async features in the WinJS Library. We cover the basics of processes and threads, how the Windows 8 execution model has changed, how apps have traditionally handled long running operations, and how Async Promises simplifies development and debugging of async operations.

 

Asynchronous programming in JavaScript

http://msdn.microsoft.com/en-us/library/windows/apps/hh700330.aspx

 

WinJS Promise Example

http://code.msdn.microsoft.com/windowsapps/Promise-e1571015

 

 

Tags:

Follow the Discussion

  • mshawmshaw

    Isn't promises callbacks under the cover?

  • @mshaw: I don't claim to be the expert on this at all.  I have an "end user's" knowledge.  However, this article:

    http://dev.bennage.com/blog/2012/08/21/winjs-unpacking-promises/

    ... does a really nice explaining what the promise really is and how it relates to callbacks.

    "A promise is an object. It is not a function and it is not the value returned from the async operation. To get to the value, you need to call the then method on the promise object. You pass a callback function as an argument to then. The promise invokes the callback and passes the value you're interested in into the callback. Clear as mud, right?"

Remove this comment

Remove this thread

close

Comments Closed

Comments have been closed since this content was published more than 30 days ago, but if you'd like to continue the conversation, please create a new thread in our Forums,
or Contact Us and let us know.