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  • Creating a smart text generator

    - by royrules22
    I'm doing this for fun (or as 4chan says "for teh lolz") and if I learn something on the way all the better. I took an AI course almost 2 years ago now and I really enjoyed it but I managed to forget everything so this is a way to refresh that. Anyway I want to be able to generate text given a set of inputs. Basically this will read forum inputs (or maybe Twitter tweets) and then generate a comment based on the learning. Now the simplest way would be to use a Markov Chain Text Generator but I want something a little bit more complex than that as the MKC basically only learns by word order (which word is more likely to appear after word x given the input text). I'm trying to see if there's something I can do to make it a little bit more smarter. For example I want it to do something like this: Learn from a large selection of posts in a message board but don't weight it too much For each post: Learn from the other comments in that post and weigh these inputs higher Generate comment and post See what other users' reaction to your post was. If good weigh it positively so you make more posts that are similar to the one made, and vice versa if negative. It's the weighing and learning from mistakes part that I'm not sure how to implement. I thought about Artificial Neural Networks (mainly because I remember enjoying that chapter) but as far as I can tell that's mainly used to classify things (i.e. given a finite set of choices [x1...xn] which x is this given input) not really generate anything. I'm not even sure if this is possible or if it is what should I go about learning/figuring out. What algorithm is best suited for this? To those worried that I will use this as a bot to spam or provide bad answers to SO, I promise that I will not use this to provide (bad) advice or to spam for profit. I definitely will not post it's nonsensical thoughts on SO. I plan to use it for my own amusement. Thanks!

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  • Cordova - Scrolling with a fixed header and footer (ios)

    - by Samu Singh
    Using Cordova (phonegap) & bootstrap to make a mobile application, testing on IOS for now. Getting an issue with a header and footer bar that are fixed with scrollable content in the middle. When tapping to scroll, the header/footer bar moves down or up with the content but then snaps back to place as soon as the scrolling completes. If I use -webkit-overflow-scrolling: touch; it works as expected, but it makes it really awkward to scroll through the content, and if you scroll passed the end, it only scrolls the header or footer (with elastic overflow) until you stop for a second. here's my html for the header/footer bars: <div id="headerBar"> <div class="container-fluid" style="background-color: #1569C7"> <div class="row"> <div class="col-xs-3 text-left"> <button id="logoutButton" type="button" class="btn btn-default"> Log Out </button> <button type="button" class="btn btn-default" id="restoreQuestionFeedButton"> <span class="glyphicon glyphicon-chevron-left"></span> </button> </div> <div class="col-xs-6 text-center" style="height: 55px"> <strong id="usernameText"></strong> </div> <div class="col-xs-3 text-right"> <button id="oldCreatQuestionButton" type="button" class="btn btn-default"> <span class="glyphicon glyphicon-plus"></span> </button> </div> </div> </div> </div> <div id="footerBar"> <div class="container-fluid" style="padding: 0"> <div class="row text-center"> <button id="createQuestionButton" type="button" class="btn btn-default footerButton"> <span class="glyphicon glyphicon-plus"></span> <strong>Ask a new free question!</strong> </button> </div> </div> </div> And here is the related CSS: #headerBar { position: fixed; z-index: 100; top: 0; left: 0; width: 100%; background-color: #1569C7; } #footerBar { position: fixed; z-index: 100; bottom: 0; left: 0; width: 100%; background-color: #1569C7 !important; }

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  • accordion effect

    - by Veejay
    There are so many 'huge' accordion scripts around and I am confused. Can anyone suggest me a simple code to turn this list into a accordion panel. To start with, only the 'Sports' list will be visible. Then when the user clicks on either Technology or Latest, the Sports will hide and the one clicked will show up and so on.. <ul id="accordion"> <li>Sports</li> <ul> <li><a href="#">Golf</a></li> <li><a href="#">Cricket</a></li> <li><a href="#">Football</a></li> </ul> <li>Technology</li> <ul> <li><a href="#">iPhone</a></li> <li><a href="#">Facebook</a></li> <li><a href="#">Twitter</a></li> </ul> <li>Latest</li> <ul> <li><a href="#">Obama</a></li> <li><a href="#">Iran Election</a></li> <li><a href="#">Health Care</a></li> </ul> </ul>

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  • Api/plugins for open source libraries?

    - by fayer
    whenever i use a open source library eg. Doctrine i always ending up coding a class (so called Facade) to use the Doctrine library. so next time i want to create a user i just type: $fields = array('name' => 'peter', 'email' => '[email protected]'); Doctrine_Facade::create_entity($entity, $fields); then it creates an entity with the provided information. so i guess, all coders will create their own "Facade". i wonder how usual it is with open source Facades to download and interact with the open source libraries? is this rare cause i haven't seen any of these. in some frameworks i have seen them called plugins, eg. plugins for twitter api or facebook api. so whenever you download a library, should you search for plugins/facades on the net, or is it better to just try coding your own? i just thought it would be great for everyone not to reinvent the wheel. thanks.

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  • @attribute elements in XML

    - by danit
    Here is my XML: ["link"]=> array(2) { [0]=> object(SimpleXMLElement)#244 (1) { ["@attributes"]=> array(3) { ["type"]=> string(9) "text/html" ["href"]=> string(48) "http://twitter.com/MoodleDan/statuses/1226112723" ["rel"]=> string(9) "alternate" } } [1]=> object(SimpleXMLElement)#245 (1) { ["@attributes"]=> array(3) { ["type"]=> string(9) "image/png" ["href"]=> string(59) "http://a3.twimg.com/profile_images/226895523/Dan_normal.png" ["rel"]=> string(5) "image" } } } ["author"]=> object(SimpleXMLElement)#246 (2) { ["name"]=> string(14) "Dan Humpherson" ["uri"]=> string(16) "http://vl3.co.uk" } The above XML is part of a larger array, but how do i get the href -> ["href"]=> string(59) "http://a3.twimg.com/profile_images/226895523/Dan_normal.png" Element to echo in PHP? This is what I tried (Wrong I know) foreach ($entry->link as $img) { echo $img->href; echo "<img src='". $img ."' />"; }

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  • how to dispaly image in grid view reading imageUrl from xml using sax parser in android

    - by Pramod kuamr
    thanks for answer but i am able to read xml file from url but i need if in xml imageUrl is there so show in grid view ..this is my xml file and read URL <?xml version="1.0" encoding="UTF-8"?> <channels> <channel> <name>ndtv</name> <logo>http://a3.twimg.com/profile_images/670625317/aam-logo--twitter.png</logo> <description>this is a news Channel</description> <rssfeed>ndtv.com</rssfeed> </channel> <channel> <name>star news</name> <logo>http://a3.twimg.com/profile_images/740897825/AndroidCast-350_normal.png</logo> <description>this is a newsChannel</description> <rssfeed>starnews.com</rssfeed> </channel> </channels>

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  • What is your favorite API developer community site? And why? [closed]

    - by whatupwilly
    There are a lot of great sites out there that offer good documentation, tools, tips, best-practices, sample code, etc. for the API's they are publishing. A sample: http://apiwiki.twitter.com http://developer.netflix.com/ http://developers.facebook.com/ https://affiliate-program.amazon.com/gp/advertising/api/detail/main.html http://code.google.com/ http://remix.bestbuy.com/ http://www.flickr.com/services/api/misc.overview.html http://products.wolframalpha.com/api/webserviceapi.html There are some no-brainers that I think a good developer site should have: Hi level introduction Quick start guide API specific details - showing example request and responses Links to sample code and/or 3rd party libraries Developer registration (e.g. get an API key) Blog But what about some other things: Online-Forum or Msg Board vs. Google Group (or similar) Galleries/ShowCases - spotlighting great apps built on the API - who has done nice galleries? Community Wiki - How do people feel about letting the community have edit rights on API documentation pages Online testing tools (like Facebook has a lot of nice interactive tools to simulate request/responses) What are some packages that you would recommend to put this all together: pbwiki Google Group pages MediaWiki API vendor package such as Sonoa Systems that offers a customizable developer portal So, to summarize: What are some other great API developer portals out there What are some nice features you like on them Any recommendations on what to use to build these features out Thanks, Will Zappos.com Public API (soon to launch) Product Manager

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  • Loading a gallery of external images with JQuery

    - by pingu
    Hi guys, I'm creating a gallery of images pulled in via a twitter image hosting service, and I want to show a loading graphic before they are displayed, but the logic seems to be failing me. I'm trying to do it the following way: <ul> <li> <div class="holder loading"> </div> </li> <li> <div class="holder loading"> </div> </li> <li>...</li> <li>...</li> </ul> Where there "loading" class has an animated spinner set as it's background image. JQuery: $('.holder').each(function(){ var imgsrc = http://example.com/imgsrc; var img = new Image(); $(img).load(function () { $(this).hide(); $(this).parent('.holder').removeClass('loading'); $(this).parent().append(this); $(this).fadeIn(); }) .error(function () { }).attr('src', imgsrc); }); Which isn't working - I'm not sure that the logic is correct and how to access the "holder" from inside the img.load nested function. What would be the best way to build this gallery so that the images display only after they've been loaded?

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  • Can not make the settings from the sidebar gadget get applied

    - by Daniel
    Hey guys, OK, I am not an expert at Sidebar Gadgets, but I have this project I will have to make for school. Have tried to solve it on my own but I got really stuck. I will have to use the Cirip API (Cirip.ro being a kind of Twitter), and for the use of the API I have to input the username. I do so by means of the Settings, but when closing the settings there is no effect. Here is the code, but it's pretty messy. I am not a web programmer so javascript/html is new to me. http://www.box.net/shared/7yogevhzrr Thank you for your remark, Andy. From gadget.js function setUserName(userNameSet){ userName = userNameSet; } function getUserName(){ return userName; } function settingsClosed(event) { if(event.closeAction == event.Action.commit) { var user = System.Gadget.Settings.read("userName"); if(user != "") { setUserName(user); } } From settings.js document.onreadystatechange = function DoInit() { if(document.readyState=="complete") { var user = System.Gadget.Settings.read("userName"); if(user != "") { userBox.value = user; } } } // -------------------------------------------------------------------- // Handle the Settings dialog closed event. // event = System.Gadget.Settings.ClosingEvent argument. // -------------------------------------------------------------------- System.Gadget.onSettingsClosing = function(event) { if (event.closeAction == event.Action.commit) { var user = userBox.value; if(user != "") { System.Gadget.Settings.write("userName", user); } event.cancel = false; } }

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  • how to store/model users/faceboook users/linkedin users, etc, with ActiveRecord?

    - by crankharder
    My app has "normal" users: those which come through a typical signup page facebook(FB) users: those which come from Facebook connect "FB-normal" users: a user that can log with both email/password * FB connect Further, there's the a slew of other openID-ish login methods (I don't think openID itself will be acceptable since it doesn't link up the accounts and allow the 3rd party specific features (posting to twitter, adding a FB post, etc etc)) So, how do I model this? Right now we have User class with #facebook_user? defined -- but it gets messy with the "FB-normal" users - plus all the validations become very tricky and hard to interpret. Also, there are methods like #deliver_password_reset! which make no sense in the context for facebook-only users. (this is lame) I've thought out STI (User::Facebook, User::Normal, User::FBNormal, etc.) This makes validations super slick, but it doesn't scale to other connection types, and all the permutations between them... User::FacebookLinkedInNormal(wtf?) Doing this with a bunch of modules I think would suck a lot. Any other ideas?

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  • How long do you keep session cookies around for?

    - by user246114
    Hi, I'm implementing a web app, which uses sessions. I'm using GWT and app engine as my client/server, but I don't think they're doing anything really different than I would do with PHP and apache etc. When a user logs into my web app, I am using HttpSession to start a session for them. I get the session id like this: // From my login servlet: getThreadLocalRequest().getSession(false).getId(); I return the sessionId back to the client, and they store it in a cookie. The tutorial I'm using sets this cookie to 'expire' in two weeks: Cookie.write("sid", theSessionId, 1000 * 60 * 60 * 24 * 14); // two weeks Here's where I'm confused: if the cookie expires in two weeks, then my user will go along using the webapp happily, only to one day browse to my site and be shown a login screen. What are my options? Can I just set no expiration time for this cookie? That way the user would have to explicitly log out, otherwise they could just use the app forever without having to log back in? Or is there a better way to do this? I can't remember sites like Twitter having ever asked me to log back in again. I seem to be permanently logged in. Do they just set no expiration? The webapp isn't protecting any sort of highly sensitive data, so I don't mind leaving a cookie that doesn't expire, but it seems like there must be a better way? This is the tutorial I'm referencing: http://code.google.com/p/google-web-toolkit-incubator/wiki/LoginSecurityFAQ Thanks

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  • Advanced Localization with Omission of Arguments in Xcode

    - by coneybeare
    I have this formatted string that I am having a translator work on. ENGLISH "Check out the %1$@ %2$@ in %3$@: %4$@" = "Check out the %1$@ %2$@ in %3$@: %4$@" GERMAN TRANSLATION "Check out the %1$@ %2$@ in %3$@: %4$@" = "Hör Dir mal %2$@ in %3$@ an: %4$@"; These are passed to a [NSString stringWithFormat:] call: ////////////////////////////////////// // Share Over Twitter NSString *frmt = NSLocalizedString(@"Check out the %1$@ %2$@ in %3$@: %4$@", @"The default tweet for sharing sounds. Use %1$@ for where the sound type (Sound, mix, playlist) will be, %2$@ for where the audio name will be, %3$@ for the app name, and %3$@ for where the sound link will be."); NSString *urlString = [NSString stringWithFormat:@"sounds/%@", SoundSoundID(audio)]; NSString *url = ([audio audioType] == UAAudioTypeSound ? UrlFor(urlString) : APP_SHORTLINK); NSString *msg = [NSString stringWithFormat: frmt, [[Audio titleForAudioType:[audio audioType]] lowercaseString], [NSString stringWithFormat:@"\"%@\"", AudioName(audio)], APP_NAME, url]; NSString *applink = [NSString stringWithFormat:@" %@", APP_SHORTLINK]; if (msg.length <= (140 - applink.length)) { msg = [msg stringByAppendingString:applink]; } returnString = msg; With the desired and actual outcome of: ENGLISH desired: "Check out the sound "This Sound Name" in My App Name: link_to_sound link_to_app" actual: "Check out the sound "This Sound Name" in My App Name: link_to_sound link_to_app" GERMAN desired: "Hör Dir mal "This Sound Name" in My App Name an: link_to_sound link_to_app" actual: "Hör Dir mal sound in "This Sound Name" an: My App Name link_to_app" THE PROBLEM The problem is that I was under the assumption that by using numbered variable in the NSLocalizedString, I could do things like this, where the %1$@ variable is completely omitted. If you notice, the German translation of the format string does not use the first argument (%1$@) at all but it ("sound") still appears in the output string. What am I doing wrong?

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  • Drupal's not reading correct values from DB

    - by John
    Hey Everyone, Here is my current problem. I am working with the chat module and I'm building a module that notifies users via AJAX that they have been invited to a chat. The current table structure for the invites table looks like this: |-------------------------------------------------------------------------| | CCID | NID | INVITER_UID | INVITEE_UID | NOTIFIED | ACCEPTED | |-------------------------------------------------------------------------| | int | int | int | int | (0 or 1) | (0 or 1) | |-------------------------------------------------------------------------| I'm using the periodical updater plug-in for JQuery to continually poll the server to check for invites. When an invite is found, I set the notified from 0 to 1. However, my problem is the periodical updater. When I first see that there is an invite, I notify the user, and set notified to 1. On the next select though, I get the same results before, as if the update didn't work. But, when I got check the database, I can see that it worked just fine. It's as if the query is querying a cache, but I can't figure it out. My code for the periodical updater is as follows: window.onload = function() { var uid = $('a#chat_uid').html(); $.PeriodicalUpdater( '/steelylib/sites/all/modules/_chat_whos_online/ajax/ajax.php', //url to service { method: 'get', //send data via... data: {uid: uid}, //data to send minTimeout: '1000', //min time before server is polled (milli-sec.) maxTimeout: '20000', //max time before server is polled (milli-sec.) multiplyer: '1.5', //multiply against curretn poll time every time constant data is returned type: 'text', //type of data recieved (response type) maxCalls: 0, //max calls to make (0=unlimited) autoStop: 0 //max calls with constant data (0=unlimited/disabled) }, function(data) //callback function { alert( data ); //for now, until i get it working } ); } And my code for the ajax call is as follows: <?php #bootstrap Drupal, and call function, passing current user's uid. function _create_chat_node_check_invites($uid) { cache_clear_all('chatroom_chat_list', 'cache'); $query = "SELECT * FROM {chatroom_chat_invite} WHERE notified=0 AND invitee_uid=%d and accepted=0"; $query_results = db_query( $query, $uid ); $json = '{"invites":['; while( $row = db_fetch_object($query_results) ) { var_dump($row); global $base_url; $url = $base_url . '/content/privatechat' . $uid .'-' . $row->inviter_uid; $inviter = db_fetch_object( db_query( "SELECT name FROM {users} WHERE uid = %d", $row->inviter_uid ) ); $invitee = db_fetch_object( db_query( "SELECT name FROM {users} WHERE uid = %d", $row->invitee_uid ) ); #reset table $query = "UPDATE {chatroom_chat_invite} " ."SET notified=1 " ."WHERE inviter_uid=%d AND invitee_uid=%d"; db_query( $query, $row->inviter_uid, $row->invitee_uid ); $json .= '['; $json .= '"' . $url . '",'; $json .= '"' . ($inviter->name) . '",'; $json .= '"' . ($invitee->name) . '"' ; $json .= '],'; } $json = substr($json, 0, -1); $json .= ']}'; return $json; } ?> I can't figure out what is going wrong, any help is greatly appreciated!

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  • Counting string length in javascript and Ruby on Rails

    - by williamjones
    I've got a text area on a web site that should be limited in length. I'm allowing users to enter 255 characters, and am enforcing that limit with a Rails validation: validates_length_of :body, :maximum => 255 At the same time, I added a javascript char counter like you see on Twitter, to give feedback to the user on how many characters he has already used, and to disable the submit button when over length, and am getting that length in Javascript with a call like this: element.length Lastly, to enforce data integrity, in my Postgres database, I have created this field as a varchar(255) as a last line of defense. Unfortunately, these methods of counting characters do not appear to be directly compatible. Javascript counts the best, in that it counts what users consider as number of characters where everything is a single character. Once the submission hits Rails, however, all of the carriage returns have been converted to \r\n, now taking up 2 characters worth of space, which makes a close call fail Rails validations. Even if I were to handcode a different length validation in Rails, it would still fail when it hits the database I think, though I haven't confirmed this yet. What's the best way for me to make all this work the way the user would want? Best Solution: an approach that would enable me to meet user expectations, where each character of any type is only one character. If this means increasing the length of the varchar database field, a user should not be able to sneakily send a hand-crafted post that creates a row with more than 255 letters. Somewhat Acceptable Solution: a javascript change that enables the user to see the real character count, such that hitting return increments the counter 2 characters at a time, while properly handling all symbols that might have these strange behaviors.

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  • confused about how to use JSON in C#

    - by Josh
    The answer to just about every single question about using C# with json seems to be "use JSON.NET" but that's not the answer I'm looking for. the reason I say that is, from everything I've been able to read in the documentation, JSON.NET is basically just a better performing version of the DataContractSerializer built into the .net framework... Which means if I want to deserialize a JSON string, I have to define the full, strongly-typed class for EVERY request I might have. so if I have a need to get categories, posts, authors, tags, etc, I have to define a new class for every one of these things. This is fine if I built the client and know exactly what the fields are, but I'm using someone else's api, so I have no idea what the contract is unless I download a sample response string and create the class manually from the JSON string. Is that the only way it's done? Is there not a way to have it create a kind of hashtable that can be read with json["propertyname"]? Finally, if I do have to build the classes myself, what happens when the API changes and they don't tell me (as twitter seems to be notorious for doing)? I'm guessing my entire project will break until I go in and update the object properties... So what exactly is the general workflow when working with JSON? And by general I mean library-agnostic. I want to know how it's done in general, not specifically to a target library... I hope that made sense, this has been a very confusing area to get into... thanks!

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  • UITableView with dynamic cell heights -- what do I need to do to fix scrolling down?

    - by Ian Terrell
    I am building a teensy tiny little Twitter client on the iPhone. Naturally, I'm displaying the tweets in a UITableView, and they are of course of varying lengths. I'm dynamically changing the height of the cell based on the text quite fine: - (CGFloat)heightForTweetCellWithString:(NSString *)text { CGFloat height = Buffer + [text sizeWithFont:Font constrainedToSize:Size lineBreakMode:LineBreakMode].height; return MAX(height, MinHeight); } - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath { NSString *text = // get tweet text for this indexpath return [self heightForTweetCellWithString:text]; } } I'm displaying the actual tweet cell using the algorithm in the PragProg book: - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"TweetCell"; TweetCell *cell = (TweetCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil) { cell = [self createNewTweetCellFromNib]; } cell.tweet.text = // tweet text // set other labels, etc return cell; } When I boot up, all the tweets visible display just fine. However, when I scroll down, the tweets below are quite mussed up -- it appears that once a cell has scrolled off the screen, the cell height for the one above it gets resized to be larger than it should be, and obscures part of the cell below it. When the cell reaches the top of the view, it resets itself and renders properly. Scrolling up presents no difficulties. Here is a video that shows this in action: http://screencast.com/t/rqwD9tpdltd I've tried quite a bit already: resizing the cell's frame on creation, using different identifiers for cells with different heights (i.e. [NSString stringWithFormat:@"Identifier%d", rowHeight]), changing properties in Interface Builder... If there are additional code snippets I can post, please let me know. Thanks in advance for your help!

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  • how does one _model_ data from relational databases in clojure ?

    - by sandeep
    I have asked this question on twitter as well the #clojure IRC channel, yet got no responses. There have been several articles about Clojure-for-Ruby-programmers, Clojure-for-lisp-programmers.. but what is the missing part is Clojure for ActiveRecord programmers . There have been articles about interacting with MongoDB, Redis, etc. - but these are key value stores at the end of the day. However, coming from a Rails background, we are used to thinking about databases in terms of inheritance - has_many, polymorphic, belongs_to, etc. The few articles about Clojure/Compojure + MySQL (ffclassic) - delve right into sql. Of course, it might be that an ORM induces impedence mismatch, but the fact remains that after thinking like ActiveRecord, it is very difficult to think any other way. I believe that relational DBs, lend themselves very well to the object-oriented paradigm because of them being , essentially, Sets. Stuff like activerecord is very well suited for modelling this data. For e.g. a blog - simply put class Post < ActiveRecord::Base has_many :comments end class Comment < ActiveRecord::Base belongs_to :post end How does one model this in Clojure - which is so strictly anti-OO ? Perhaps the question would have been better if it referred to all functional programming languages, but I am more interested from a Clojure standpoint (and Clojure examples)

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  • Using Everyauth/Express and Multiple Configurations?

    - by Zane Claes
    I'm successfully using Node.js + Express + Everyauth ( https://github.com/abelmartin/Express-And-Everyauth/blob/master/app.js ) to login to Facebook, Twitter, etc. from my application. The problem I'm trying to wrap my head around is that Everyauth seems to be "configure and forget." I set up a single everyauth object and configure it to act as middleware for express, and then forget about it. For example, if I want to create a mobile Facebook login I do: var app = express.createServer(); everyauth.facebook .appId('AAAA') .appSecret('BBBB') .entryPath('/login/facebook') .callbackPath('/callback/facebook') .mobile(true); // mobile! app.use(everyauth.middleware()); everyauth.helpExpress(app); app.listen(8000); Here's the problem: Both mobile and non-mobile clients will connect to my server, and I don't know which is connecting until the connection is made. Even worse, I need to support multiple Facebook app IDs (and, again, I don't know which one I will want to use until the client connects and I partially parse the input). Because everyauth is a singleton which in configured once, I cannot see how to make these changes to the configuration based upon the request that is made. What it seems like is that I need to create some sort of middleware which acts before the everyauth middleware to configure the everyauth object, such that everyauth subsequently uses the correct appId/appSecret/mobile parameters. I have no clue how to go about this... Suggestions? Here's the best idea I have so far, though it seems terrible: Create an everyauth object for every possible configuration using a different entryPath for each...

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  • Google App Engine - How to implement the activity stream in a social network

    - by spidee
    I want some ideas on the best practice to implement an activity stream for a social network im building in app engine (PYTHON) I first want to keep a log for all activities of each user - so that we have a history. i.e. someone became a friend, added a picture, changed their address etc. This way we have a users history available should we need it. Also mean we can remove friendship joins, change user data but have a historical log. I also want to stream a users activity to their friends. for this only the last X activities need to be kept - that is in the scenario that messages are sent to friends when an activity occurs. Its pretty straight forward designing a history log - ie: when, what, where. The complication comes as to how we notify friends of a user as to their activity. In our app friendships are not mutual - ie they are based on the twitter following model. Some accounts could have thousands of followers. What is the best approach to model this. using a many to many join table and doing a costly query - using a feed class that fired a copy of the activity to all the subscribers - maybe into mcache? As their maybe a need to fire thousands of messages i would imagine a cron job would need to be used. Any help ideas thoughts on this Thx

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  • PHP and MySQL echoing out a Table

    - by user1631702
    Okay, so I've done this before, and it worked. I am trying to echo out specific rows on my database in a table. Here is my code: <?php $connect = mysql_connect("localhost", "xxx", "xxx") or die ("Hey loser, check your server connection."); mysql_select_db("xxx"); $quey1="select * from `Ad Requests`"; $result=mysql_query($quey1) or die(mysql_error()); ?> <table border=1 style="background-color:#F0F8FF;" > <caption><EM>Student Record</EM></caption> <tr> <th>Student ID</th> <th>Student Name</th> <th>Class</th> </tr> <?php while($row=mysql_fetch_array($result)){ echo "</td><td>"; echo $row['id']; echo "</td><td>"; echo $row['twitter']; echo "</td><td>"; echo $row['why']; echo "</td></tr>"; } echo "</table>"; ?> It gives me no errors, but It just shows a blank table with none of these rows. My Question: How come this wont show any rows in the table, what am I doing wrong?

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  • Good ways to earn income as a self employed developer

    - by nullptr
    I was just wondering if people could share their experiences and ideas about generating / earning income from a software product or service they have personally developed. To me this seems like a good way to earn a living while doing what we love (programming) and working on projects and problems which interest us. Ie, NOT boring bank or marketing software etc 9-5 all week... Some ideas I have are things like web 2.0 style sites (Facebook,Youtube,Twitter,Digg) etc etc... - These can be very very profitable as we all know but can take years to take off. Are there ways to survive until/if this does happen? Mobile applications. Iphone, Google Android and the new up coming Nintendo DS app store. These have good potential to make it easy to find a market for your application and make selling it easy. Shareware/PC software. A bit 80's and 90's and you kind of need to be a salesman/marketer to sell it but its the only other thing I can think of. Also im not talking about doing freelance work. Im only interested in idea's you can come up with and develop your self (not other peoples ideas or problems which are you are payed to develop). Things that a sole developer or at the most 2 developers could work on and have good potential for high returns on investment (in terms of time) would be great. PS, I wish I thought of stackoverflow!

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  • Cassandra instead of MySQL for social networking app

    - by Christopher McCann
    I am in the middle of building a new app which will have very similar features to Facebook and although obviously it wont ever have to deal with the likes of 400,000,000 million users it will still be used by a substantial user base and most of them will demand it run very very quickly. I have extensive experience with MySQL but a social app offers complexities which MySQL is not well suited too. I know Facebook, Twitter etc have moved towards Cassandra for a lot of their data but I am not sure how far to go with it. For example would you store such things as user data - username, passwords, addresses etc in Cassandra? Would you store e-mails, comments, status updates etc in Cassandra? I have also read alot that something like neo4j is much better for representing the friend relationships used by social apps as it is a graph database. I am only just starting down the NoSQL route so any guidance is greatly appreciated. Would anyone be able to advise me on this? I hope I am not being too general!

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  • Gettingn Started with Facebook API

    - by Btibert3
    I have a friend that owns a small business and has a Page on Facebook. I want to help her manage it from a marketing perspective, and figure that it may be best to do so through their API. I have skimmed their API documentation, and have a basic working knowledge of Python. What I can't figure out is if I can access their page's data with Python and grab the data on wall posts, who liked posts, etc. Is this possible? I can't find a decent tutorial for someone who is new to programming. To provide context, I have been scraping the Twitter Search API for some time now and I am hoping there is something similar (request certain data elements, and have it returned as structured data I can analyze). I find their API extremely straight forward, and for Facebook, I don't know where to begin. I don't want to create an application, I simply want to access the data that is related to my friend's page. I am hoping to find some decent tutorials and help on what I will need to get started. Any help you can provide will be greatly appreciated.

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  • how to make it easy for users to register at my site?

    - by rob
    I want to make it dirt simple for users coming to my site to register so they can post comments, vote on things, etc. I would like for them to be able to use their facebook id, twitter id, yahoo mail id, gmail id, AIM id, msn id, or whatever else people are likely to have (not necessarily all of those, but the more the better). I want my mom to be able to do it in 30 seconds or less. (that is, no "enter your open id url here" type thing that would confuse her). I prefer they not have to pick a unique name, as that gets annoying as the site gets more users and it gets hard to find one that is unique. What is the best option here? I'm not quite sure about OpenId vs. OAuth, and whether there are other options. And I'd like it to be as simple for me, the developer, as possible (of course!). I don't want to spend forever learning some protocol, nor have to structure my whole app around this. It would be great if there was a site with sample code that is pretty easy to drop in. BTW, StackOverflow is a good example of a site that was easy for me to register for.

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  • Where should I put validation code?

    - by D Lawson
    I'm creating interfaces and abstract classes that represent a messaging framework for short text-based messages like SMS, email, twitter, xml, etc.. and I was wondering where I should put the message validation code. The thing is that I am only writing the superclasses and interfaces, so I'm not putting the actual implementation in, I'll just put the hooks in that allow others to validate the content of the messages. The way I see it, I could do it several ways: in the abstract superclass "Message", have an abstract method 'isValid'. A variation on this would be to have isValid be called when the Message constructor is called, throwing a MalformedMessageException if the message is formatted incorrectly. in the transport layer, immediately before sending, validate the message. I would have a send(Message) method that calls an isValid(Message) method immediately before it sends. have a singleton message validator with a static method isValid(Message) that is called at some point. I'm sure there are other options that I'm missing. Currently, I'm leaning towards the first one, but it doesn't feel right to me to have validation code in what should be a domain object.

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