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  • Any suggestions on how to extract 6 million records from an oracle10g ?

    - by R K
    I just want to give you a little background Need to write a PL-SQL which will extract 6 million record joining different tables and create a file of that. Need more suggestions, specifically on how to fetch these many records. As fetching these million of records on a single go can be a highly resource intensive. So question is how to fetch these many records ? Any pl-sql will be highly appreciated.

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  • Login Facebook using Web-Harvest

    - by parin
    I tried to login Facebook using Web-Harvest. I used the following xml code to login < ?xml version="1.0" encoding="UTF-8"? < config charset="ISO-8859-1" < file action="write" path="homepage.xml" charset="UTF-8" < html-to-xml < http method="post" url="http://www.facebook.com/login.php" cookie-policy="browser" < http-param name="email"myemail < http-param name="pass"mypassword < /http < /html-to-xml < /file The homepage.xml (output) file contains the xml code for the login page of facebook along with the following lines: < h2 class="main_message" id="standard_error"Cookies Required< /h2< p class="sub_message" id="standard_explanation"Cookies are not enabled on your browser. Please adjust this in your security preferences before continuing.< /p I tried all the allowed values for cookie-policy in the http processor of the xml code but was unsuccessful.

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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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  • Ubuntu 10.04 (Lucid) OpenLDAP invalid credentials issue

    - by gmuller
    This won't be a question, but a solution to an infuriating problem on Ubuntu 10.04. If you tried to deploy an LDAP server using this distro following the tutorials below, you'll be on serious trouble. Tutorials: https://help.ubuntu.com/9.10/serverguide/C/openldap-server.html https://help.ubuntu.com/9.10/serverguide/C/samba-ldap.html The error first appear, on the line: "ldapsearch -xLLL -b cn=config -D cn=admin,cn=config -W olcDatabase=hdb olcAccess" It simply won't allow admin to access the "cn=config", thus you won't be able to deploy the LDAP server correctly. After almost a week searching for a solution, I've found this page: https://bugs.launchpad.net/ubuntu-docs/+bug/333733 On comment #5, the solution is presented. Quoting the author: when you get to the setting up ACL part you all of a sudden need to use a cn=admin,cn=config, that doesn't exist creating a config.ldif with dn: olcDatabase={0}config,cn=config changetype: modify add: olcRootDN olcRootDN: cn=admin,cn=config dn: olcDatabase={0}config,cn=config changetype: modify add: olcRootPW olcRootPW: secret dn: olcDatabase={0}config,cn=config changetype: modify delete: olcAccess and adding it with ldapadd -Y EXTERNAL -H ldapi:/// -f config.ldif It's unacceptable that a Linux distribution, popular like Ubuntu, have such ridiculous bug. Hope it helps everyone!

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  • Using MongoDB with Ruby On Rails and the Mongomapper plugin

    - by Micke
    Hello, i am currently trying to learn Ruby On Rails as i am a long-time PHP developer so i am building my own community like page. I have came pritty far and have made the user models and suchs using MySQL. But then i heard of MongoDB and looked in to it a little bit more and i find it kinda nice. So i have set it up and i am using mongomapper for the connection between rails and MongoDB. And i am now using it for the News page on the site. I also have a profile page for every User which includes their own guestbook so other users can come to their profile and write a little message to them. My thought now is to change the User models from using MySQL to start using MongoDB. I can start by showing how the models for each User is set up. The user model: class User < ActiveRecord::Base has_one :guestbook, :class_name => "User::Guestbook" The Guestbook model model: class User::Guestbook < ActiveRecord::Base belongs_to :user has_many :posts, :class_name => "User::Guestbook::Posts", :foreign_key => "user_id" And then the Guestbook posts model: class User::Guestbook::Posts < ActiveRecord::Base belongs_to :guestbook, :class_name => "User::Guestbook" I have divided it like this for my own convenience but now when i am going to try to migrate to MongoDB i dont know how to make the tables. I would like to have one table for each user and in that table a "column" for all the guestbook entries since MongoDB can have a EmbeddedDocument. I would like to do this so i just have one Table for each user and not like now when i have three tables just to be able to have a guestbook. So my thought is to have it like this: The user model: class User include MongoMapper::Document one :guestbook, :class_name => "User::Guestbook" The Guestbook model model: class User::Guestbook include MongoMapper::EmbeddedDocument belongs_to :user many :posts, :class_name => "User::Guestbook::Posts", :foreign_key => "user_id" And then the Guestbook posts model: class User::Guestbook::Posts include MongoMapper::EmbeddedDocument belongs_to :guestbook, :class_name => "User::Guestbook" But then i can think of one problem.. That when i just want to fetch the user information like a nickname and a birthdate then it will have to fetch all the users guestbook posts. And if each user has like a thousand posts in the guestbook it will get really much to fetch for the system. Or am i wrong? Do you think i should do it any other way? Thanks in advance and sorry if i am hard to understand but i am not so educated in the english language :)

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  • ASP.NET MVC - using model property as form, how can I post to action?

    - by Ryan Peters
    Consider the following model: public class BandProfileModel { public BandModel Band { get; set; } public IEnumerable<Relationship> Requests { get; set; } } and the following form: <% using (Html.BeginForm()) { %> <%: Html.EditorFor(m => m.Band) %> <input type="submit" value="Save Band" /> <% } %> which posts to the following action: public ActionResult EditPost(BandProfileModel m, string band) { // stuff is done here, but m is null? return View(m); } Basically, I only have one property on my model that is used in the form. The other property in BandProfleModel is just used in the UI for other data. I'm trying to update just the Band property, but for each post, the argument "m" is always null (specifically, the .Band property is null). It's posting just fine to the action, so it isn't a problem with my route. Just the data is null. The ID and name attributes of the fields are BAND_whatever and Band.whatever (whatever being a property of Band), so it seems like it would work... What am I doing wrong? How can I use just one property as part of a form, post back, and have values populated via the model binder for my BandProfileModel property in the action? Thanks.

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  • How and when do browsers implement real-time changes to a document's DOM?

    - by Mark
    My website dynamically embeds an external Javascript file into the head tag. The external Javascript defines a global variable myString = "data". At what point does myString become accessible to Javascript within the website? <html> <head> <script type="text/javascript"> myString = null; external = document.createElement("script"); //externalScript.js is one line, containing the following: //myString = "data"; external.setAttribute("src", "externalScript.js"); external.setAttribute("type", "text/javascript"); document.getElementsByTagName("head")[0].append(external); alert(myString); <script> </head> <body> </body> </html> This code alerts null (when I thought it would alert "data") in Chrome and IE, even though the DOM has loaded in externalScript.js at this point. When is externalScript.js actually evaluated by the browser and at what point do I have access to the new value of myString?

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  • jQuery draggable + droppable: how to snap dropped element to dropped-on element

    - by 10goto10
    I have my screen divided into two DIVs. In the left DIV I have a few 50x50 pixel DIVs, in the right DIV I have an empty grid made of 80x80 LIs. The DIVs on the left are draggable, and once dropped on a LI, they should snap to center of that LI. Sounds simple, right? I just don't know how to get this done. I tried by manipulating the dropped DIV's top and left CSS properties to match those of the LI they're dropped into, but the left and top properties are relative to the left DIV. How can I best have the dropped element snap to the center of the element it's dropped into? That's gotta be simple, right? Edit: I'm using jQuery UI 1.7.2 with jQuery 1.3.2. Edit 2: For whoever else has this problem, this is how I fixed it: I used Keith's solution of removing the dragged element and placing it inside the dropped-on element in the drop callback of the droppable plugin: function gallerySnap(droppedOn, droppedElement) { $(droppedOn).html('<div class="drop_styles">'+$(droppedElement).html()+'</div>' ); $(droppedElement).remove(); } I don't the dropped element to be draggable again, but if you do, just bind draggable to it again. For me this method also solved the problem I had when positioning the dropped elements (which would be relative to the left DIV) and scrolling inside the second DIV. (Elements would remain fixed on page, now they scroll along). I did play with the snap options to make it look good while dragging, so thanks to karim79 for that suggestion. I probably won't win any Awesome Code prizes with this, so if you see room for improvement, please share!

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  • how to show a large jpg image to the right in jqGrid's edit form ?

    - by cLee
    Is it possible to show a large (i.e. bigger than a thumbnail) jpeg image in the right-hand side of jqGrid's edit form ? Users want to look at a photo while entering data into fields ... they are describing things in the photo. I'm sure all things are possible with jQuery, but I don't know where to begin. thanks ... html: function afterSubmit(r, data, action) { // if session timeout returned: if (r.responseText == "logout") { window.location = '../scripts/logout.php'; } // if an error message is returned: if (r.responseText != "") { $('#submit_errors').html('Alert:'+r.responseText+''); // show div with error message $('#submit_errors').slideDown(); // hide error div after 10 seconds window.setTimeout(function() { $('#submit_errors').slideUp(); }, 10000); return false; // don't remove this! } return true; // don't remove this! } var lastsel; jQuery(document).ready(function(){ var mygrid = jQuery("#mobile_incidents").jqGrid({ url:'list.php?q=e', editurl:'edit.php', datatype: "json", // note: all column names are required even though some columns are hidden colNames:['Rec#','Date','Line','Photo'], colModel:[{ name:'id', index:'id', editable:true, editoptions: {readonly:'readonly'} }, { name:'mobile_discoveryDate', index:'mobile_discoveryDate', sortable:false, editable:true, edittype:'text', formatter:'date', formatoptions:{ srcformat:'Y/m/d', newformat:'m/d/Y' }, editoptions:{ size:12, maxlength:10, dataInit: function(element) { $(element).blur(); $(element).datepicker({dateFormat:'mm/dd/yyyy'}) } } }, { name:'mobile_lineName', index:'mobile_lineName', editable:true, sortable:false}, { name:'mobile_photo_name', index:'mobile_photo_name', editable:false, sortable:false} ], pager: '#mobile_incidents_pager', altRows: false, rowNum:10, rowList:[10,20], imgpath: '../include/images/jqgrid', viewrecords: true, emptyrecords:'No submissions found!', height: 260, sortname: 'id', sortorder: 'desc', gridview: true, scrollrows: true, autowidth: true, rownumbers: false, multiselect: false, subGrid:false, caption: '' }) .navGrid('#mobile_incidents_pager', // params: {add:false, edit:true, del:false, search:false, view:false, refresh:true, alertcap:' to edit:', alerttext:' . . . click on a row to highlight' }, // edit params: {top:50, left:5, editCaption: 'Edit Submission', bSubmit: 'Approve/Save', closeAfterEdit:true, afterSubmit:function(r,data){return afterSubmit(r,data,'edit');} }, {}, // add params {}, // delete params // search params: {multipleSearch: false}, // view params: {top: 150, left: 5, caption: 'View Mobile Rail Submission'} ); });

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  • jBASE 4.1 Database Noobster Questions

    - by Steve Johnson
    I am a software developer with devlopment experience in C#, C++ .Net alongwith SQL Server 2005/08, Oracle and mysql. But somehow i dont get jBASE to work at Windows XP SP3 machine. My goal is setup user accounts, create database on a JBASE ainstallation, authenticate and backup/restore few table via a C++ program. And i dont need to do it with builtin backup/restore tools of jBASE. I am able to install jBASe 4.1 aling with all its accessories on my WINXPSP3 machine. I was able to run the jSlimserver and TEMENOUS server along with licnesing server. I was able to add the license key as well. But after that what i was supposed to do? i have no idea about it. The docs and online help doesnt answer a simple question of how to create a database! The google search results from the jbase site all go to the 404 Pages! Can a jBASE expert guide to the following steps: Create a jBASE database. Create users Authenticate via those users Connect to database Create tables and insert data. Connect via a C++ or C# program to connect to jBASE DB and backup/restore tables. I know that this is too much too ask but i dont get to get the JBASE system. I cant get it to work on my System somehow. Btw, jdc and jexloree doesnt seem to do anything. I have checked that enironmental variables for jBASE are setup correctly and i have verified them. There are no extra JRE or JDK installations on my system. Besides all that, only licensing client, slim server and temenous server seem to run and listen for connections and no other execuatable ever seems to work. A simple tutorial to achieve the objective will be highly appreciated. Also if anyone can point out the mistake that i have done or anything i might need to check, then please do so. I will be highly encouraged and obliged. Thanks Steve

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  • Try/Catch with jquery ajax request

    - by Anthony
    I am trying to build a Google Chrome extension that makes an ajax request. Something similar to the GMail Checker extension. The problem is that when I do the request using jquery, and I put in the wrong username/password, it fails silently, with the error callback function ignored. If I move the ajax call out of the background.html script (where I can't see the requests in the developer window), to the options.html script, I get a dialog box to re-authenticate. If I hit cancel, THEN the jquery error callback fires. But in the original model extension (again, the Gmail checker), they use plain (non-jquery) ajax calls with a try/catch, and if I put in the wrong credentials, I get an alert saying as much. I tried wrapping the entire jquery call in a try/catch, like so: try { $.ajax({ type: "POST", url: someurl, contentType : "text/xml", data: somedata, username: user, password: pass, success: function(data,status,xhr){ alert("Hurrah!"); }, error: function(xhr, status, error){ alert("Error!" + xhr.status); }, dataType: "xml" }); } catch(e) { alert("You messed something up!"); } But still nothing. Is the error due to it being asynchronous, or is Chrome not returning the request as an error since it wants to re-prompt for credentials? Or do I just not know how to use try/catch? Update Here is a very slimmed down version of how the model code does the request: var req = new XMLHttpRequest(); req.onreadystatechange = function() { try { if ( req.readyState == 4 ) { //Do some stuff with results } } catch (ex) { alert('Error parsing response.'); } } try { req.send (data); } catch (ex) { alert ('Something went wrong with the request.'); }

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  • Inheriting from ViewPage forces explicit casting of model in view

    - by Martin Hansen
    I try to inhering from ViewPage as shown in this question http://stackoverflow.com/questions/370500/inheriting-from-viewpage But I get a Compiler Error Message: CS1061: 'object' does not contain a definition for 'Spot' and no extension method 'Spot' accepting a first argument of type 'object' could be found (are you missing a using directive or an assembly reference?) My viewpage, normally I can do Model.ChildProperty(Spot) when I inherit from ViewPage directly, so I do that here too. But it fails. <%@ Page Language="C#" Inherits="Company.Site.ViewPageBase<WebSite.Models.SpotEntity>" %> <h1><%= Html.Encode(Model.Spot.Title) %></h1> To get it working correctly I have to do like this: <%@ Page Language="C#" Inherits="Company.Site.ViewPageBase<WebSite.Models.SpotEntity>" %> <h1><%= Html.Encode(((WebSite.Models.SpotEntity)Model).Spot.Title) %></h1> Here is my classes: namespace Company.Site { public class ViewPageBase<TModel> : Company.Site.ViewPageBase where TModel:class { private ViewDataDictionary<TModel> _viewData; [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")] public new ViewDataDictionary<TModel> ViewData { get { if (_viewData == null) { SetViewData(new ViewDataDictionary<TModel>()); } return _viewData; } set { SetViewData(value); } } protected override void SetViewData(ViewDataDictionary viewData) { _viewData = new ViewDataDictionary<TModel>(viewData); base.SetViewData(_viewData); } } public class ViewPageBase : System.Web.Mvc.ViewPage { } } So how do I get it to work without the explicit cast?

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  • Text mining on large database (data mining)

    - by yox
    Hello, I have a large database of resumes (CV), and a certain table skills grouping all users skills. inside that table there's a field skill_text that describes the skill in full text. I'm looking for an algorithm/software/method to extract significant terms/phrases from that table in order to build a new table with standarized skills.. Here are some examples skills extracted from the DB : Sectoral and competitive analysis Business Development (incl. in international settings) Specific structure and road design software - Microstation, Macao, AutoCAD (basic knowledge) Creative work (Photoshop, In-Design, Illustrator) checking and reporting back on campaign progress organising and attending events and exhibitions Development : Aptana Studio, PHP, HTML, CSS, JavaScript, SQL, AJAX Discipline: One to one marketing, E-marketing (SEO & SEA, display, emailing, affiliate program) Mix marketing, Viral Marketing, Social network marketing. The output shoud be something like : Sectoral and competitive analysis Business Development Specific structure and road design software - Macao AutoCAD Photoshop In-Design Illustrator organising events Development Aptana Studio PHP HTML CSS JavaScript SQL AJAX Mix marketing Viral Marketing Social network marketing emailing SEO One to one marketing As you see only skills remains no other representation text. I know this is possible using text mining technics but how to do it ? the database is realy large.. it's a good thing because we can calculate text frequency and decide if it's a real skill or just meaningless text... The big problem is .. how to determin that "blablabla" is a skill ? thanks

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  • Why is document.body == null in Firefox but not Safari

    - by dlamblin
    I have a problem with a page where I am trying to get colorbox (a kind of lightbox for jQuery) working. It doesn't work apparently due to the document.body being null in FireFox (3.5.3). This is not the case in Safari (4.0.3) where the colorbox works. Something that jumps out at me is that (I'm using Drupal 6) drupal has appended a script tag to set some JavaScript variables at the very bottom of the page, below the closing body and html tags. Otherwise I don't see a problem. Unfortunately I'm having a lot of trouble getting it not to do that. Could it be this that's causing FF to have issues with the body? Using colorbox's example files in Firefox does work (and the document.body is defined there). Is there any way I could use jQuery to refill the document.body property with something from $() perhaps, or should I keep banging at drupal to not put a script tag outside the html tags (easier said than done)? To clarify the document.body is null even after the page is done loading. Here's a Firebug console capture: >>> document.body null >>> $().attr('body') null

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  • Looping Redirect with PyFacebook and Google App Engine

    - by Nick Gotch
    I have a Python Facebook project hosted on Google App Engine and use the following code to handle initialization of the Facebook API using PyFacebook. # Facebook Initialization def initialize_facebook(f): # Redirection handler def redirect(self, url): logger.info('Redirecting the user to: ' + url) self.response.headers.add_header("Cache-Control", "max-age=0") self.response.headers.add_header("Pragma", "no-cache") self.response.out.write('<html><head><script>parent.location.replace(\'' + url + '\');</script></head></html>') return 'Moved temporarily' auth_token = request.params.get('auth_token', None) fbapi = Facebook(settings['FACEBOOK_API_KEY'], settings['FACEBOOK_SECRET_KEY'], auth_token=auth_token) if not fbapi: logger.error('Facebook failed to initialize') if fbapi.check_session(request) or auth_token: pass else: logger.info('User not logged into Facebook') return lambda a: redirect(a, fbapi.get_login_url()) if fbapi.added: pass else: logger.info('User does not have ' + settings['FACEBOOK_APP_NAME'] + ' added') return lambda a: redirect(a, fbapi.get_add_url()) # Return the validated API logger.info('Facebook successfully initialized') return lambda a: f(a, fbapi=fbapi) I'm trying to set it up so that I can drop this decorator on any page handler method and verify that the user has everything set up correctly. The issue is that when the redirect handler gets called, it starts an infinite loop of redirection. I tried using an HTTP 302 redirection in place of the JavaScript but that kept failing too. Does anyone know what I can do to fix this? I saw this similar question but there are no answers.

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  • Syntax Error with John Resig's Micro Templating after changing template tags <# {% {{ etc..

    - by optician
    I'm having a bit of trouble with John Resig's Micro templating. Can anyone help me with why it isn't working? This is the template <script type="text/html" id="row_tmpl"> test content {%=id%} {%=name%} </script> And the modified section of the engine str .replace(/[\r\t\n]/g, " ") .split("{%").join("\t") .replace(/((^|%>)[^\t]*)'/g, "$1\r") .replace(/\t=(.*?)%>/g, "',$1,'") .split("\t").join("');") .split("%}").join("p.push('") .split("\r").join("\\'") + "');}return p.join('');"); and the javascript var dataObject = { "id": "27", "name": "some more content" }; var html = tmpl("row_tmpl", dataObject); and the result, as you can see =id and =name seem to be in the wrong place? Apart from changing the template syntax blocks from <% % to {% %} I haven't changed anything. This is from Firefox. Error: syntax error Line: 30, Column: 89 Source Code: var p=[],print=function(){p.push.apply(p,arguments);};with(obj){p.push(' test content ');=idp.push(' ');=namep.push(' ');}return p.join('');

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  • Suggestions for entering mobile development -- pure iPhone SDK, Android SDK, Mono Touch or Titanium

    - by Tom Cabanski
    I am entering mobile development. I have been working primarily in .NET since 1.0 came out in beta. Before that, I was mostly a C++ and Delphi guy and still dabble in C++ from time to time. I do web apps quite a bit so I am reasonably proficient with Javascript, JQuery and CSS. I have also done a few Java applications. I started web programming with CGI and live mostly in the ASP.NET MVC world these days. I am trying to decide on which platform/OS and tool to select. I am concerned with the size of the market available for my applications as well as the marketibility of the skills I will pick up. The apps I have in mind would work on both phones and pads. Some aspects of what I have in mind will play better on the bigger screens that will be available on pads. Here are the options I am considering: Apple iPhone/iPad using pure Apple SDK (Objective-C) Apple iPhone/iPad using Mono Touch (C#) Android using pure Android SDK (Java) Multiple platforms using something like Titanium to generate native apps from web technologies (HTML, CSS and Javascript) Multiple platforms using HTML5 web applications that run in the browser (HTML, CSS and Javascript). Which option would you choose? Do you have a different suggestion? What are the pros and cons?

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  • SQL is this equvelent to a LEFT JoIn?

    - by Jim
    Is this equvelent to a LEFT JOIN? select distinct a.name, b.name from tableA a, (select name from tableB) as b It seems as though there is no link between the two tables. Is there an easier / more efficient way to write this?

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  • sIfr (3.436) and IE8 - My h1 and h2 are flickering

    - by André
    I am using sIfr (3.436) for my H1 and H2 tags. In IE8 the text flickers and jumps around alot. See example: http://www.addenergy.no/drilling-production/category352.html I have tried various font-tuning as explained at Wiki.Novemberborn, but can't get a good result. Any help to lead in the right direction is appreciated! The sifr-config.js looks like this (h1/h2 is basically the same): sIFR.fitExactly = true; sIFR.fixWrap = true; sIFR.forceWidth = true; sIFR.replace(fedraSerif, { selector: '#placeholder-top h1', css: '.sIFR-root { background-color: #FFFFFF; color: #000000; }', ratios: [8, (...), 1.26] }); And sifr.css (bottom): @media screen { .sIFR-active #placeholder-top h1 { visibility: hidden; font-family: Verdana; font-size:2.5em; line-height:40px; } .sIFR-active #placeholder-top h2 { visibility: hidden; font-family: Verdana; font-size:2em; line-height:30px; } } My style.css (general for the site has): html, body { font-family: Verdana, Arial, Sans-serif; margin: 0; padding: 0; color: #333; background: #cccccc url('images/background.gif') repeat-y top center; } h1 { font-size: 35px; line-height: 40px; } #placeholder-top h1 { margin: 20px 120px 10px 5px; font-size:2.5em; display:block; line-height: 40px; } h2 { line-height: 30px; color: #009bdb; } #placeholder-top h2 { margin: 0px 120px 20px 5px; font-size:2em; display:block; line-height: 30px; }

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  • Rails Nested Forms Attributes not saving if Fields Added with jQuery

    - by looloobs
    Hi I have a rails form with a nested form. I used Ryan Bates nested form with jquery tutorial and I have it working fine as far as adding the new fields dynamically. But when I go to submit the form it does not save any of the associated attributes. However if the partial builds when the form loads it creates the attribute just fine. I can not figure out what is not being passed in the javascript that is failing to communicate that the form object needs to be saved. Any help would be great. class Itinerary < ActiveRecord::Base accepts_nested_attributes_for :trips end itinerary/new.html <% form_for ([@move, @itinerary]), :html => {:class => "new_trip" } do |f| %> <%= f.error_messages %> <%= f.hidden_field :move_id, :value => @move.id %> <% f.fields_for :trips do |builder| %> <%= render "trip", :f => builder %> <% end %> <%= link_to_add_fields "Add Another Leg to Your Trip", f, :trips %> <p><%= f.submit "Submit" %></p> <% end %> application_helper.rb def link_to_remove_fields(name, f) f.hidden_field(:_destroy) + link_to_function(name, "remove_fields(this)") end def link_to_add_fields(name, f, association) new_object = f.object.class.reflect_on_association(association).klass.new fields = f.fields_for(association, new_object, :child_index => "new_#{association}") do |builder| render(association.to_s.singularize, :f => builder) end link_to_function(name, h("add_fields(this, \"#{association}\", \"#{escape_javascript(fields)}\")")) end application.js function add_fields(link, association, content) { var new_id = new Date().getTime(); var regexp = new RegExp("new_" + association, "g") $(link).parent().before(content.replace(regexp, new_id)); }

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  • How to optimize my PageRank calculation?

    - by asmaier
    In the book Programming Collective Intelligence I found the following function to compute the PageRank: def calculatepagerank(self,iterations=20): # clear out the current PageRank tables self.con.execute("drop table if exists pagerank") self.con.execute("create table pagerank(urlid primary key,score)") self.con.execute("create index prankidx on pagerank(urlid)") # initialize every url with a PageRank of 1.0 self.con.execute("insert into pagerank select rowid,1.0 from urllist") self.dbcommit() for i in range(iterations): print "Iteration %d" % i for (urlid,) in self.con.execute("select rowid from urllist"): pr=0.15 # Loop through all the pages that link to this one for (linker,) in self.con.execute("select distinct fromid from link where toid=%d" % urlid): # Get the PageRank of the linker linkingpr=self.con.execute("select score from pagerank where urlid=%d" % linker).fetchone()[0] # Get the total number of links from the linker linkingcount=self.con.execute("select count(*) from link where fromid=%d" % linker).fetchone()[0] pr+=0.85*(linkingpr/linkingcount) self.con.execute("update pagerank set score=%f where urlid=%d" % (pr,urlid)) self.dbcommit() However, this function is very slow, because of all the SQL queries in every iteration >>> import cProfile >>> cProfile.run("crawler.calculatepagerank()") 2262510 function calls in 136.006 CPU seconds Ordered by: standard name ncalls tottime percall cumtime percall filename:lineno(function) 1 0.000 0.000 136.006 136.006 <string>:1(<module>) 1 20.826 20.826 136.006 136.006 searchengine.py:179(calculatepagerank) 21 0.000 0.000 0.528 0.025 searchengine.py:27(dbcommit) 21 0.528 0.025 0.528 0.025 {method 'commit' of 'sqlite3.Connecti 1 0.000 0.000 0.000 0.000 {method 'disable' of '_lsprof.Profiler 1339864 112.602 0.000 112.602 0.000 {method 'execute' of 'sqlite3.Connec 922600 2.050 0.000 2.050 0.000 {method 'fetchone' of 'sqlite3.Cursor' 1 0.000 0.000 0.000 0.000 {range} So I optimized the function and came up with this: def calculatepagerank2(self,iterations=20): # clear out the current PageRank tables self.con.execute("drop table if exists pagerank") self.con.execute("create table pagerank(urlid primary key,score)") self.con.execute("create index prankidx on pagerank(urlid)") # initialize every url with a PageRank of 1.0 self.con.execute("insert into pagerank select rowid,1.0 from urllist") self.dbcommit() inlinks={} numoutlinks={} pagerank={} for (urlid,) in self.con.execute("select rowid from urllist"): inlinks[urlid]=[] numoutlinks[urlid]=0 # Initialize pagerank vector with 1.0 pagerank[urlid]=1.0 # Loop through all the pages that link to this one for (inlink,) in self.con.execute("select distinct fromid from link where toid=%d" % urlid): inlinks[urlid].append(inlink) # get number of outgoing links from a page numoutlinks[urlid]=self.con.execute("select count(*) from link where fromid=%d" % urlid).fetchone()[0] for i in range(iterations): print "Iteration %d" % i for urlid in pagerank: pr=0.15 for link in inlinks[urlid]: linkpr=pagerank[link] linkcount=numoutlinks[link] pr+=0.85*(linkpr/linkcount) pagerank[urlid]=pr for urlid in pagerank: self.con.execute("update pagerank set score=%f where urlid=%d" % (pagerank[urlid],urlid)) self.dbcommit() This function is 20 times faster (but uses a lot more memory for all the temporary dictionaries) because it avoids the unnecessary SQL queries in every iteration: >>> cProfile.run("crawler.calculatepagerank2()") 64802 function calls in 6.950 CPU seconds Ordered by: standard name ncalls tottime percall cumtime percall filename:lineno(function) 1 0.004 0.004 6.950 6.950 <string>:1(<module>) 1 1.004 1.004 6.946 6.946 searchengine.py:207(calculatepagerank2 2 0.000 0.000 0.104 0.052 searchengine.py:27(dbcommit) 23065 0.012 0.000 0.012 0.000 {meth 'append' of 'list' objects} 2 0.104 0.052 0.104 0.052 {meth 'commit' of 'sqlite3.Connection 1 0.000 0.000 0.000 0.000 {meth 'disable' of '_lsprof.Profiler' 31298 5.809 0.000 5.809 0.000 {meth 'execute' of 'sqlite3.Connectio 10431 0.018 0.000 0.018 0.000 {method 'fetchone' of 'sqlite3.Cursor' 1 0.000 0.000 0.000 0.000 {range} But is it possible to further reduce the number of SQL queries to speed up the function even more?

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  • Jquery ui sortable clone helper not working

    - by Jeremy Seekamp
    Maybe I don't understand how clone works with sortable, but here is what I would like to do. When sorting an item I would like a clone of the item I am dragging remain until I stop drop the item in its new position. Here's the code: <html> <head> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.2/jquery-ui.min.js"></script> <style type="text/css"> .sort { width: 150px; } .ui-state-highlight { background-color: #000; height:2px; } </style> </head> <body> <div> <ul class="sort"> <li>Item 1</li> <li>Item 2</li> <li>Item 3</li> <li>Item 4</li> </ul> </div> <script type="text/javascript"> $(function() { $('.sort').sortable({ helper: 'clone', placeholder: 'ui-state-highlight', opacity: '.5' }) }) </script> </body> </html> Thanks in advance for the help!

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  • jQuery addClass on $.post

    - by Tim
    I am basically trying to create a small registration form. If the username is already taken, I want to add the 'red' class, if not then 'green'. The PHP here works fine, and returns either a "YES" or "NO" to determine whether it's ok. The CSS: input { border:1px solid #ccc; } .red { border:1px solid #c00; } .green { border:1px solid green; background:#afdfaf; } The Javascript I'm using is: $("#username").change(function() { var value = $("#username").val(); if(value!= '') { $.post("check.php", { value: value }, function(data){ $("#test").html(data); if(data=='YES') { $("#username").removeClass('red').addClass('green'); } if(data=='NO') { $("#username").removeClass('green').addClass('red'); } }); } }); I've got the document.ready stuff too... It all works fine because the #test div html changes to either "YES" or "NO", apart from the last part where I check what the value of the data is. Here is the php: $value=$_POST['value']; if ($value!="") { $sql="select * FROM users WHERE username='".$value."'"; $query = mysql_query($sql) or die ("Could not match data because ".mysql_error()); $num_rows = mysql_num_rows($query); if ($num_rows 0) { echo "NO"; } else { echo "YES"; } }

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  • Create Zip File In Windows and Extract Zip File In Linux

    - by Yan Cheng CHEOK
    I had created a zip file (together with directory) under Windows as follow : package sandbox; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.util.zip.ZipEntry; import java.util.zip.ZipOutputStream; /** * * @author yan-cheng.cheok */ public class Main { /** * @param args the command line arguments */ public static void main(String[] args) { // These are the files to include in the ZIP file String[] filenames = new String[]{"MyDirectory" + File.separator + "MyFile.txt"}; // Create a buffer for reading the files byte[] buf = new byte[1024]; try { // Create the ZIP file String outFilename = "outfile.zip"; ZipOutputStream out = new ZipOutputStream(new FileOutputStream(outFilename)); // Compress the files for (int i=0; i<filenames.length; i++) { FileInputStream in = new FileInputStream(filenames[i]); // Add ZIP entry to output stream. out.putNextEntry(new ZipEntry(filenames[i])); // Transfer bytes from the file to the ZIP file int len; while ((len = in.read(buf)) > 0) { out.write(buf, 0, len); } // Complete the entry out.closeEntry(); in.close(); } // Complete the ZIP file out.close(); } catch (IOException e) { e.printStackTrace(); } } } The newly created zip file can be extracted without problem under Windows, by using http://www.exampledepot.com/egs/java.util.zip/GetZip.html However, I realize if I extract the newly created zip file under Linux, using http://www.exampledepot.com/egs/java.util.zip/GetZip.html, I will get a file named "MyDirectory\MyFile.txt" instead of MyFile.txt being placed under folder MyDirectory. I try to solve the problem by changing the zip file creation code to String[] filenames = new String[]{"MyDirectory" + "/" + "MyFile.txt"}; But, is this an eligible solution, by hard-coded the seperator? Will it work under Mac OS? (I do not have a Mac to try out)

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  • Dojo addOnLoad, but is Dojo loaded?

    - by adamrice32
    I've encountered what seems like a chicken & egg problem, and have what I think is a logical solution. However, it occurred to me that others must have encountered something similar, so I figured I'd float it out there for the masses. The situation is that I want to use dojo's addOnLoad function to queue up a number of callbacks which should be executed after the DOM has completed rendering on the client side. So what I'm doing is as follows: <html> <head> <script type="text/javascript" src="dojo.xd.js"></script> ... </head> <body> ... <script type="text/javascript"> dojo.addOnLoad( ... ); dojo.addOnLoad( ... ); ... </script> </body> </html> Now, the issue is that I seem to be calling dojo.addOnLoad before the entire Dojo library has been downloaded the browser. This makes sense in a way, because the inline SCRIPT contents should be executed before the entire DOM is loaded (and the normal body onload callback is triggered). My question is this - is my approach sound, or would it make more sense to register a normal/standard body onload JavaScript callback to call a function, which does the same work that each of the dojo.addOnLoads is doing in the SCRIPT block. Of course, this begs the question, why would you ever then use dojo.addOnLoad if you're not guaranteed that the Dojo library will be loaded prior to using the library? Hopefully this situation makes sense to someone other than me. Seems like someone else may have encountered this situation. Thoughts? Best Regards, Adam Rice

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