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  • Stream sound card output to icecast2 via darkice

    - by Alberto Burgos
    I want to stream to icecast server via darkice, the default .cfg comes with /dev/dsp, witch is OSS, but there is no /dev/dsp in Ubuntu 12.10, so I tried hw:0,0, but it's just the microphone, and I would like to stream all of the sound-card output. Any ideas? cat /proc/asound/cards 0 [SB ]: HDA-Intel - HDA ATI SB HDA ATI SB at 0xf8700000 irq 16 cat /proc/asound/devices 1: : sequencer 2: [ 0- 0]: digital audio playback 3: [ 0- 0]: digital audio capture 4: [ 0- 0]: hardware dependent 5: [ 0] : control 33: : timer I tried following this post: How can I stream my soundcard output?

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  • Good use of the Charms Bar in Windows 8 Metro.

    - by Shawn Cicoria
    If you’re using Win8 yet, no doubt you’ve run into the charms bar.  There’s a feature to extend via Share, links to your application. Details on the HOW are here: Adding share (Metro style apps using JavaScript and HTML) http://msdn.microsoft.com/en-us/library/windows/apps/hh758314.aspx Do, Digital Folio has taken their shopping tool to Win8 and enabled some really cool ways to take advantage.  I was fortunate enough to help out the folks there a while back on some other things, but their app is a nice shoppers aid. Digital Folio for Windows 8 | Instant Price Comparisons from Major Retailers on the Products You Want

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  • How to Deauthorize Flash Content Before You Sell Your PC

    - by Taylor Gibb
    When it comes to selling your old digital equipment you usually should wipe it of all digital traces with something like DBAN, however if you cant there are some precautions you should take, here’s one related to flash content you may have viewed on your PC. When you rent or purchase a movie over a service that uses flash, it authorizes your PC to play that particular content. When you sell your PC, unless you deauthorize your PC, the new owner will still be able to view and play the content your purchased. 6 Ways Windows 8 Is More Secure Than Windows 7 HTG Explains: Why It’s Good That Your Computer’s RAM Is Full 10 Awesome Improvements For Desktop Users in Windows 8

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  • On-board HDMI Audio

    - by TrackStar
    I have tried searching for answers to this issue but have had no luck. My HDMI display is working but I have no audio from the HDMI .There is no option for HDMI under sound preferences hardware or output. Purging and re-installing pulse audio doesn't change anything. I am using the on-board HDMI port on my motherboard, I do not have a PCI graphics card installed. CPU: i7-3770 Mobo: Asus Sabertooth z77 Kernel: 2.6.39-3-bb03 running aplay -l returns ** List of PLAYBACK Hardware Devices ** card 0: Intel [HDA Intel], device 0: ALC892 Analog [ALC892 Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 card 0: Intel [HDA Intel], device 1: ALC892 Digital [ALC892 Digital] Subdevices: 1/1 Subdevice #0: subdevice #0 Seems as if the system doesn't even recognize the possibilty of HDMI audio output. Any ideas?

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  • How to make read-only file system writable?

    - by Tim
    I am not sure since when the filesystem on my digital audio player has been changed to be read-only. I cannot copy files into it or remove files on it. Are there some possible reasons for the player's file system to change the permission of its file system? I tried chmod: $ sudo chmod a+rw SGTL\ MSCN/ chomd: changing permissions of `SGTL MSCN/': Read-only file system where "SGTL MSCN" is the mounted point of the digital audio player. I was wondering how to make it writable? Thanks and regards!

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  • Creating an IIS 6 Virtual Directory with PowerShell v2 over WMI/ADSI

    - by codepoke
    I can create an IISWebVirtualDir or IISWebVirtualDirSetting with WMI, but I've found no way to turn the virtual directory into an IIS Application. The virtual directory wants an AppFriendlyName and a Path. That's easy because they're part of the ...Setting object. But in order to turn the virtual directory into an App, you need to set AppIsolated=2 and AppRoot=[its root]. I cannot do this with WMI. I'd rather not mix ADSI and WMI, so if anyone can coach me through to amking this happen in WMI I'd be very happy. Here's my demo code: $server = 'serverName' $site = 'W3SVC/10/ROOT/' $app = 'AppName' # If I use these args, the VirDir is not created at all. Fails to write read-only prop # $args = @{'Name'=('W3SVC/10/ROOT/' + $app); ` # 'AppIsolated'=2;'AppRoot'='/LM/' + $site + $app} # So I use this single arg $args = @{'Name'=($site + $app)} $args # Look at the args to make sure I'm putting what I think I am $v = set-wmiinstance -Class IIsWebVirtualDir -Authentication PacketPrivacy ` -ComputerName $server -Namespace root\microsoftiisv2 -Arguments $args $v.Put() # VirDir now exists # Pull the settings object for it and prove I can tweak it $filter = "Name = '" + $site + $app + "'" $filter $v = get-wmiobject -Class IIsWebVirtualDirSetting -Authentication PacketPrivacy ` -ComputerName $server -Namespace root\microsoftiisv2 -Filter $filter $v.AppFriendlyName = $app $v.Put() $v # Yep. Changes work. Goes without saying I cannot change AppIsolated or AppRoot # But ADSI can change them without a hitch # Slower than molasses in January, but it works $a = [adsi]("IIS://$server/" + $site + $app) $a.Put("AppIsolated", 2) $a.Put("AppRoot", ('/LM/' + $site + $app)) $a.Put("Path", "C:\Inetpub\wwwroot\news") $a.SetInfo() $a Any thoughts?

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  • Start TabActivity from ListActivity (which is content of parent TabActivity) in Android

    - by barmaleikin
    Hi guys, I have problems with switching between activities. I have two TabActivities (A and B), each of of tab activity has 4 tabs with ListActivity. I am trying to show B activity onListItemClick. Code on click is: Intent intent = new Intent(getApplicationContext(), TabBActivity.class); startActivity(intent); My manifest file is following: <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com" android:versionCode="1" android:versionName="1.0"> <application android:icon="@drawable/app_icon" android:label="@string/app_name" android:debuggable="true"> <activity android:name=".SplashScreen" android:label="@string/app_name"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android:name=".TabAActivity"> <intent-filter> <action android:name="com.TabAActivity" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android:name=".TabAListActivityA" android:label="AA"/> <activity android:name=".TabAListActivityB" android:label="AB"/> <activity android:name=".TabAListActivityC" android:label="AC"/> <activity android:name=".TabBActivity" android:label="B"/> <activity android:name=".TabAListBctivityA" android:label="BA"/> <activity android:name=".TabAListBctivityB" android:label="BB"/> <activity android:name=".TabAListBctivityC" android:label="BC"/> </application> </manifest> Is my manifest correct or maybe something is wrong with code? I would appreciate any help on this topic.

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  • How do I handle the browser's "share page" intent in android?

    - by gfxmonk
    I read here ( http://androidlittle.blogspot.com/2009/08/intent-filter-for-share-link.html ) what intent-filter is required to handle the "share link" intent that the android web browser sends. I have placed this inside an block in my AndroidManifest.xml like so: <activity android:name=".ShareLink"> <intent-filter> <action android:name="android.intent.action.SEND" /> <category android:name="android.intent.category.DEFAULT" /> <data android:mimeType="text/plain" /> </intent-filter> <meta-data/> </activity> I cannot for the life of me get this to be triggered though. When I share a link in the android browser, the emulator log shows it's creating a chooser intent, but doesn't give the details of the intent the chooser is acting on. No chooser window pops up, and the intent gets handled by the SMS application. I have also tried kicking off the intent manually: adb shell am start -D -a android.intent.action.SEND -c android.intent.category.DEFAULT -t text/plain -d http://google.com/ but the response I get is: Starting: Intent { act=android.intent.action.SEND cat=[android.intent.category.DEFAULT] dat=http://google.com/ typ=text/plain } Error: Activity not started, unable to resolve Intent { act=android.intent.action.SEND cat=[android.intent.category.DEFAULT] dat=http://google.com/ typ=text/plain flg=0x10000000 } Can anyone tell me what I'm doing wrong? My main (launcher) activity works fine, so I assume there is no issue with installation on the emulator.

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  • Dojo Datagrid Filtering Issue

    - by Zoom Pat
    I am having hard time filtering a datagrid. Please help! This is how I draw a grid. var jsonStore = new dojo.data.ItemFileWriteStore({data:columnValues}); gridInfo = { store: jsonStore, queryOptions: {ignoreCase: true}, structure: layout }; grid = new dojox.grid.DataGrid(gridInfo, "gridNode"); grid.startup(); Now if i try something like this, it works fine and gives me the rows which has the column (AGE_FROM) value equal to 63. grid.filter({AGE_FROM:63}); but I need all kinds of filtering and not just 'equal to' So how do I try to obtain all the rows which have AGE_FROM 63, and < 63 and <= 63 and =63. because grid.filter({AGE_FROM:<63}); does not work Also One other way I was thingking was to use the following filteredStore = new dojox.jsonPath.query(filterData,"[?(@.AGE_FROM = 63]"); and then draw the grid with the filteredStore, but the above is not working for a != operator. Once I figure a good way to filter grid I need to see a way to filter out dates. I am trying to find a good example for filtering dataGrid but most of the examples are just filtering based on the 'equal to' criteria. Any help is highly appreciated.

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  • Multiple dex files define Lcom/google/api/client/auth/oauth/AbstractOAuthGetToken;

    - by Elad Benda
    I have just followed this tutorial: https://developers.google.com/drive/quickstart-android so I don't see a reason for duplicated libs in my project. I have added the drive Client lib via Google plugin for eclipse When I build my android app with this manifest <uses-sdk android:minSdkVersion="15" android:targetSdkVersion="16" /> <uses-permission android:name="android.permission.READ_CALENDAR" /> <uses-permission android:name="android.permission.WRITE_CALENDAR" /> <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/> <uses-permission android:name="android.permission.GET_ACCOUNTS"/> <uses-permission android:name="android.permission.INTERNET" /> <application android:icon="@drawable/todo" android:label="@string/app_name" > <activity android:name=".TodosOverviewActivity" android:label="@string/app_name" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android:name=".TodoDetailActivity" android:windowSoftInputMode="stateVisible|adjustResize" > <intent-filter> <action android:name="android.intent.action.SEND" /> <category android:name="android.intent.category.DEFAULT" /> <data android:mimeType="image/*" /> </intent-filter> </activity> <provider android:name=".contentprovider.MyTodoContentProvider" android:authorities="de.vogella.android.todos.contentprovider" > </provider> </application> I get the following error: [2013-10-27 00:43:58 - Dex Loader] Unable to execute dex: Multiple dex files define Lcom/google/api/client/auth/oauth/AbstractOAuthGetToken; [2013-10-27 00:43:58 - de.vogella.android.todos] Conversion to Dalvik format failed: Unable to execute dex: Multiple dex files define Lcom/google/api/client/auth/oauth/AbstractOAuthGetToken; how can I fix this?

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  • YUI DataTable with JSON and client side filtering Data Error

    - by user316574
    Hi, I don't understand what I'm doing wrong here ! I keep getting a Data Error. But I validated the JSON and it's ok... Here is the javascript from the YUI Datatble example (slightly modified). <div class="markup"> <label for="filter">Filter by state:</label> <input type="text" id="filter" value=""> <div id="tbl"></div> -- YAHOO.util.Event.addListener(window, "load", function() { //var Ex = YAHOO.namespace('example'); var dataSource = new YAHOO.util.DataSource("jsondb/json_meta_proxy.html",{ responseType : YAHOO.util.DataSource.TYPE_JSON, responseSchema : { resultsList: "records", fields: [ {key:"idprojet"}, {key:"nomprojet"} ], metaFields: { totalRecords: "totalRecords" } }, doBeforeCallback : function (req,raw,res,cb) { // This is the filter function var data = res.results || [], filtered = [], i,l; if (req) { req = req.toLowerCase(); for (i = 0, l = data.length; i and here is the JSON data in the file "jsondb/json_meta_proxy.html" { "recordsReturned": 1, "totalRecords": 1, "startIndex": 0, "sort": "idprojet", "dir": "asc", "records": [ { "idprojet": "11256", "nomprojet": "" } ] } Many thanks for your help !!!

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  • Django queryset not returning the same values as the generated sql

    - by HRCerqueira
    Hello guys, I have the following queryset: subscribers = User.objects.values('email', 'username').filter( Q(subscription_settings__new_question='i') | Q(subscription_settings__new_question_watched_tags='i', marked_tags__id__in=question.tags.values('id'), tag_selections__reason='good') ).exclude(id=question.author.id) The problem is that when I evaluate the query I get only the values that are filtered by the first Q object (even if I reverse the order of the objects). So lets say that I was expecting the user A, B, C and D, where A and B are filtered by the first Q object and C and D by the second. But the queryset only returns A and B. I used the django debug toolbar to see the query that was actually being executed (and then I used a direct print statement like "print subscriber.query.as_sql()" just to be sure) and then evaluated the query directly using psql (I'm using postgres by the way), and I get the results I expect. Here's the query btw: SELECT "auth_user"."email", "auth_user"."username" FROM "auth_user" LEFT OUTER JOIN "forum_markedtag" ON ("auth_user"."id" = "forum_markedtag"."user_id") INNER JOIN "forum_defaultsubscriptionsetting" ON ("auth_user"."id" = "forum_defaultsubscriptionsetting"."user_id") WHERE ((("forum_markedtag"."reason" = E'good' AND "forum_defaultsubscriptionsetting"."new_question_watched_tags" = E'i' AND "forum_markedtag"."tag_id" IN (SELECT U0."id" FROM "tag" U0 INNER JOIN "question_tags" U1 ON (U0."id" = U1."tag_id") WHERE U1."question_id" = 64 )) OR "forum_defaultsubscriptionsetting"."new_question" = E'i' ) AND NOT ("auth_user"."id" = 10 )) Thanks in advance EDIT: I tried to break the queryset into two, one that uses the first Q object as the filter and another one with the second Q object, and although the second queryset produces the correct sql that returns the correct values when evaluated directly, it still doesn't return nothing when evaluated as a django queryset. heres the alternative code: subscribers = User.objects.values('email', 'username').filter( subscription_settings__new_question='i').exclude(id=question.author.id) subscribers2 = User.objects.values('email', 'username').filter( subscription_settings__new_question_watched_tags='i', marked_tags__id__in=question.tags.values('id'), tag_selections__reason='good').exclude(id=question.author.id)

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  • Settings variable values in a Moq Callback() call

    - by Adam Driscoll
    I think I may be a bit confused on the syntax of the Moq Callback methods. When I try to do something like this: IFilter filter = new Filter(); List<IFoo> objects = new List<IFoo> { new Foo(), new Foo() }; IQueryable myFilteredFoos = null; mockObject.Setup(m => m.GetByFilter(It.IsAny<IFilter>())).Callback( (IFilter filter) => myFilteredFoos = filter.FilterCollection(objects)).Returns(myFilteredFoos.Cast<IFooBar>()); This throws a exception because myFilteredFoos is null during the Cast<IFooBar>() call. Is this not working as I expect? I would think FilterCollection would be called and then myFilteredFoos would be non-null and allow for the cast. FilterCollection is not capable of returning a null which draws me to the conclusion it is not being called. Also, when I declare myFilteredFoos like this: Queryable myFilteredFoos; The Return call complains that myFilteredFoos may be used before it is initialized.

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  • Designing a fluid Javascript interface to abstract away the asynchronous nature of AJAX

    - by Anurag
    How would I design an API to hide the asynchronous nature of AJAX and HTTP requests, or basically delay it to provide a fluid interface. To show an example from Twitter's new Anywhere API: // get @ded's first 20 statuses, filter only the tweets that // mention photography, and render each into an HTML element T.User.find('ded').timeline().first(20).filter(filterer).each(function(status) { $('div#tweets').append('<p>' + status.text + '</p>'); }); function filterer(status) { return status.text.match(/photography/); } vs this (asynchronous nature of each call is clearly visible) T.User.find('ded', function(user) { user.timeline(function(statuses) { statuses.first(20).filter(filterer).each(function(status) { $('div#tweets').append('<p>' + status.text + '</p>'); }); }); }); It finds the user, gets their tweet timeline, filters only the first 20 tweets, applies a custom filter, and ultimately uses the callback function to process each tweet. I am guessing that a well designed API like this should work like a query builder (think ORMs) where each function call builds the query (HTTP URL in this case), until it hits a looping function such as each/map/etc., the HTTP call is made and the passed in function becomes the callback. An easy development route would be to make each AJAX call synchronous, but that's probably not the best solution. I am interested in figuring out a way to make it asynchronous, and still hide the asynchronous nature of AJAX.

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  • Please help! request compression

    - by Naor
    Hi, I wrote an IHttpModule that compress my respone using gzip (I return a lot of data) in order to reduce response size. It is working great as long as the web service doesn't throws an exception. In case exception is thrown, the exception gzipped but the Content-encoding header is disappear and the client doesn't know to read the exception. How can I solve this? Why the header is missing? I need to get the exception in the client. Here is the module: public class JsonCompressionModule : IHttpModule { public JsonCompressionModule() { } public void Dispose() { } public void Init(HttpApplication app) { app.BeginRequest += new EventHandler(Compress); } private void Compress(object sender, EventArgs e) { HttpApplication app = (HttpApplication)sender; HttpRequest request = app.Request; HttpResponse response = app.Response; try { //Ajax Web Service request is always starts with application/json if (request.ContentType.ToLower(CultureInfo.InvariantCulture).StartsWith("application/json")) { //User may be using an older version of IE which does not support compression, so skip those if (!((request.Browser.IsBrowser("IE")) && (request.Browser.MajorVersion <= 6))) { string acceptEncoding = request.Headers["Accept-Encoding"]; if (!string.IsNullOrEmpty(acceptEncoding)) { acceptEncoding = acceptEncoding.ToLower(CultureInfo.InvariantCulture); if (acceptEncoding.Contains("gzip")) { response.AddHeader("Content-encoding", "gzip"); response.Filter = new GZipStream(response.Filter, CompressionMode.Compress); } else if (acceptEncoding.Contains("deflate")) { response.AddHeader("Content-encoding", "deflate"); response.Filter = new DeflateStream(response.Filter, CompressionMode.Compress); } } } } } catch (Exception ex) { int i = 4; } } } Here is the web service: [WebMethod] public void DoSomething() { throw new Exception("This message get currupted on the client because the client doesn't know it gzipped."); } I appriciate any help. Thanks!

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  • Filtering log4net on method name - can't quite get it

    - by Mike Kingscott
    I'm using log4net to log my web app's progress, using Log4PostSharp to AOP-injectify all methods. This has the desired effect of logging (almost) everything and is fine. I now have a requirement to log JUST Page_Load methods to a file / console. I can obviously hamstring the log4postsharp class to do that, but then I'd be losing all the other logging. I've been looking at filters in log4net, starting with the StringMatch filter, but that only looks at the message being logged, and I'm after the method name. This put me onto the PropertyFilter, but still with no joy. My log4net.config snippet is thus: <appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender"> <filter type="log4net.Filter.PropertyFilter"> <key value="LocationInfo.MethodName"/> <stringToMatch value="Page_Load"/> </filter> <file value="d:\\xxxx\\yyyyy\\zzzzLog"/> As you can see, I'm trying to key into the MethodName of the logging event via LocationInfo, but I'm still getting everything logged. Can anyone assist? Thank you, Mike K.

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  • DirectSho GMFBridge not working as expected

    - by user1327407
    I am trying to understand why wont the source filter connect with VMR9? mediaController.InsertSourceFilter(sinkFilter, m_pRenderGraph, out sourceFilter); var vmr = new VideoMixingRenderer9(); m_pRenderGraph.AddFilter(vmr as IBaseFilter, "VMR"); IBaseFilter vmrBase = FilterGraphTools.FindFilterByClsid(m_pRenderGraph, Clsid.VideoMixingRenderer9); IVMRFilterConfig9 xd = vmrBase as IVMRFilterConfig9; if (xd != null) { int status = xd.SetRenderingMode(VMR9Mode.Windowless); } FilterGraphTools.ConnectFilters(m_pRenderGraph, sourceFilter, vmrBase, true); mediaController.BridgeGraphs(sinkFilter, sourceFilter); Without going into too much detail: Line „ConnectFilters“ fails because no intermediate filters are found to make that connection work. When trying to debug, I can clearly see that Source filter is not spitting out anything useful. (It’s like that the sink<--source transfer never works), so that’s why it wont connect. However, when I get source filter „Output 1“ pin, and then use myGraph.Render(source_output_pin), it works. Data is being sent from sink to source and everything connects automatically. However the problem is that the wrong VMR is inserted there. It’s VMR Renderer. I would like to have VMR9, that’s why im doing it. Why wont it work with VMR9 and why does source filter not show correct media type. Thank you.

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  • WCF 3.5 Service and multiple http bindings

    - by mortenvpdk
    Hi I can't get my WCF service to work with more than one http binding. In IIS 7 I have to bindings http:/service and http:/service.test both at port 80 In my web.config I have added the baseAddressPrefixFilters but I can't add more than one <serviceHostingEnvironment> <baseAddressPrefixFilters> <add prefix="http://service"/> <add prefix="http://service.test"/> </baseAddressPrefixFilters> </serviceHostingEnvironment> This gives almost the same error "This collection already contains an address with scheme http. There can be at most one address per scheme in this collection. " as if no filers were specified at all (This collection already contains an address with scheme http. There can be at most one address per scheme in this collection. Parameter name: item) If I add only one filter then the service works but only responds on the added filter address. I've also tried with specifing multiple endpoints like (and only one filter): <endpoint address="http://service.test" binding="basicHttpBinding" bindingConfiguration="" contract="IService" /> <endpoint address="http://service" binding="basicHttpBinding" bindingConfiguration="" contract="IService" /> Then still only the address also specified in the filter works and the other returns this error: Server Error in Application "ISPSERVICE" HTTP Error 400.0 - Bad Request Regards Morten

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  • Designing a fluid Javascript interface to hide callback asynchrony

    - by Anurag
    How would I design an API to hide the asynchronous nature of AJAX and HTTP requests, or basically delay it to provide a fluid interface. To show an example from Twitter's new Anywhere API: // get @ded's first 20 statuses, filter only the tweets that // mention photography, and render each into an HTML element T.User.find('ded').timeline().first(20).filter(filterer).each(function(status) { $('div#tweets').append('<p>' + status.text + '</p>'); }); function filterer(status) { return status.text.match(/photography/); } vs this (asynchronous nature of each call is clearly visible) T.User.find('ded', function(user) { user.timeline(function(statuses) { statuses.first(20).filter(filterer).each(function(status) { $('div#tweets').append('<p>' + status.text + '</p>'); }); }); }); It finds the user, gets their tweet timeline, filters only the first 20 tweets, applies a custom filter, and ultimately uses the callback function to process each tweet. I am guessing that a well designed API like this should work like a query builder (think ORMs) where each function call builds the query (HTTP URL in this case), until it hits a looping function such as each/map/etc., the HTTP call is made and the passed in function becomes the callback. An easy development route would be to make each AJAX call synchronous, but that's probably not the best solution. I am interested in figuring out a way to make it asynchronous, and still hide the asynchronous nature of AJAX.

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  • Django access data passed to form

    - by realshadow
    Hey, I have got a choiceField in my form, where I display filtered data. To filter the data I need two arguments. The first one is not a problem, because I can take it directly from an object, but the second one is dynamically generated. Here is some code: class GroupAdd(forms.Form): def __init__(self, *args, **kwargs): self.pid = kwargs.pop('parent_id', None) super(GroupAdd, self).__init__(*args, **kwargs) parent_id = forms.IntegerField(widget=forms.HiddenInput) choices = forms.ChoiceField( choices = [ [group.node_id, group.name] for group in Objtree.objects.filter( type_id = ObjtreeTypes.objects.values_list('type_id').filter(name = 'group'), parent_id = 50 ).distinct()] + [[0, 'Add a new one'] ], widget = forms.Select( attrs = { 'id': 'group_select' } ) ) I would like to change the parent_id that is passed into the Objtree.objects.filter. As you can see I tried in the init function, as well with kwargs['initial']['parent_id'] and then calling it with self, but that doesnt work, since its out of scope... it was pretty much my last effort. I need to acccess it either trough the initial parameter or directly trough parent_id field, since it already holds its value (passed trough initial). Any help is appreciated, as I am running out of ideas.

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  • Designing a fluent Javascript interface to abstract away the asynchronous nature of AJAX

    - by Anurag
    How would I design an API to hide the asynchronous nature of AJAX and HTTP requests, or basically delay it to provide a fluid interface. To show an example from Twitter's new Anywhere API: // get @ded's first 20 statuses, filter only the tweets that // mention photography, and render each into an HTML element T.User.find('ded').timeline().first(20).filter(filterer).each(function(status) { $('div#tweets').append('<p>' + status.text + '</p>'); }); function filterer(status) { return status.text.match(/photography/); } vs this (asynchronous nature of each call is clearly visible) T.User.find('ded', function(user) { user.timeline(function(statuses) { statuses.first(20).filter(filterer).each(function(status) { $('div#tweets').append('<p>' + status.text + '</p>'); }); }); }); It finds the user, gets their tweet timeline, filters only the first 20 tweets, applies a custom filter, and ultimately uses the callback function to process each tweet. I am guessing that a well designed API like this should work like a query builder (think ORMs) where each function call builds the query (HTTP URL in this case), until it hits a looping function such as each/map/etc., the HTTP call is made and the passed in function becomes the callback. An easy development route would be to make each AJAX call synchronous, but that's probably not the best solution. I am interested in figuring out a way to make it asynchronous, and still hide the asynchronous nature of AJAX.

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