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  • Are there any well-known algorithms or computer models that computer scientists use to predict FIFA

    - by Khnle
    Occasionally I read news articles that mention about some computer models that computer scientists use to predict winners of some sporting events or the odds for betting which I think there must be a mathematical model behind it. I never bothered to think twice even though I am a "pseudo computer scientist" myself. With the 2010 FIFA World Cup just underway, and since I am also a "pseudo football/soccer player" myself, I just started to wonder about these calculations algorithms. For example, I know one factor is determining the strength of opponents, so that a win against a strong opponent can count more than a win against a weak opponent. But it now kind of gets in a circular loop, or at least how does one determine the strength of a team in the first place, before that team can be considered strong or weak? If it's based on a historical data then there's no way that could be accurate, because those players of the past are no longer on the fields so their impact is none (except maybe if they become coaches like Maradona) Anyway, long question short, if you're happen to be working in this field or have some knowledge, please shed some lights.

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  • Rails group validation with just one error message

    - by Victor
    The following validation code in the model: validates :formatted_address, :zip, :city, :state, :country, :presence => true, :message => "is incomplete. Please enter full address." is displayed when either of the fields are empty. Let's say now :address and country are empty, 2 errors are displayed: Formatted Address is incomplete. Please enter full address. Country is incomplete. Please enter full address. How can I group the error message in the validation to just show one error message if either of the fields validated does not exist? Address is incomplete. Please enter full address. Thanks.

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  • Where to put code snippets in Rails?

    - by Nik
    Hello all, I have this code snippets that generates a signature for POSTs. The detail of it is not important, but what I want to know is: since it is not a model-related chunk of code, it really can be use anywhere: in controllers, in models, in view helpers; even in views. So I am unsure where and, even bigger of a problem, how to activate the use of it once I place it in some location. Is it what those "require" statements are all about? That you can acquire some functionality through a "require" statement in the current file you are working on? Just so that we have an example to talk about, say, I have a little snippet of code that does cubing: def cube_it(num) num**3 end I know that I will be using it in various places across the application, so where should I put it? and when I do need to use it, how can I "summon" it? Thank You

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  • How can I use form_remote_tag to update an acts_as_taggable_on field?

    - by Angela
    I have a model called Company which is acts_as_taggable_on. When I am /SHOWing a Company (e.g. company/15) I want to be able to see a form that allows me to add tags. I suppose this would be easier by just allowing at edit but sometimes I want to go back and just add tags. This is what I tried to do and I get an error: <div id = 'tags'> <strong>Tags:</strong> <% form_remote_tag(:url => {:action => 'update'}, :update => 'tags') do %> <%= text_field :company, :tag_list %> <%= submit_tag 'Save' %> <% end %> </div> Thanks!

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  • In Ruby, is there are better way of selecting a constant (or avoiding the constant altogether) based

    - by Vertis
    Not sure the title fully describes the problem/question I'm trying to ask, sorry. I'm One of my fellow developers has created classes as such: class Widget attr_accessor :model_type ... end and: class ModelType MODEL1 = "model1" MODEL2 = "model2" MODEL3 = "model3" end Now he wants me to convert a retrieved string "MODEL1" to the constant. So that when he is referencing that model elsewhere he can use ModelType::MODEL1. Obviously I've got to convert from the string I'm being given with something like the following: case model_type when 'MODEL1' @model_type = ModelType::MODEL1 ... end I feel like this is clunky, so I'd like to know if there is a better DRYer way of providing this kind of functionality.

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  • Crystal Reports XSD file required?

    - by user270370
    Hi, I am trying to create a new report using the PUSH MODEL to supply data. I am creating a DataTable in my C# code and pushing this to a report using a template. I have created a report template and an XSD (using DataSet.WriteXmlSchema) and added this to my report using the Database Expert option. I have since deleted the xsd schema but the report still seems to be working. I was wondering why this was happening. Is the xsd file stored in the report? Thanks a lot. Ravi

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  • jquery background image fade

    - by Nick
    I am using jQuery to load ina background image that fills the page width / height. I have the following in the Head: $(document).ready(function() { $('body').css({ 'background-image' : 'url({HTML_BASE}images/backgrounds/randoms/{BACK_IMG})', 'background-repeat' : 'no-repeat', 'background-position' : 'center top', 'background-attachment': 'fixed', 'background-size': '100% 100%', }); $('#home-promo').innerfade({ speed: 'slow', timeout: 5000, type: 'sequence', containerheight: 'auto' }); $('.model-search').innerfade({ speed: 'slow', timeout: 5000, type: 'sequence', containerheight: '393' }); }); This works fine and can be seen at http://projects.snowshtechnologies.com/golden_dragon/home/ I want the BG image to fade in from the black background colour. I have looked at a few other threads on Stack that suggest its not possible as a body element defined in css, but in this scenario the BG image is being loaded in by jQuery. How would I go about adding a fade in to this code to bring the image in with a nice fadein?

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  • MVC Pass textbox to controller if not in a form tag

    - by user1679820
    I am working on and Microsoft MVC3 project and cannot pass a parameter which has been edited to the controller. It will only pass back the original set parameter For example: @Ajax.ActionLink("share file", InviteController.Actions.Result, InviteController.Name, new { message = Model.Message }, new AjaxOptions { HttpMethod = "GET", UpdateTargetId = "popup", OnSuccess = "$('#popup').dialog('open')" }, new { id = "popup-button" }) <label>Personal Message <span class="optional-message">(optional)</span></label> @Html.TextAreaFor(x => x.Message) </div> This will pass the to the following controller but the 'message' parameter has the original message and not the updated message: public ActionResult Result(FormCollection coll, string message) { I'd love if someone could give me some advice. Many Thanks

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  • What action is my Symfony/Doctrine generated form actually going to?

    - by Arms
    In my Symfony 1.4 project I am using the doctrine:generate-admin task to create the modules that compose my backend system. One such module is "journeys". When I view the source of the "journeys/new" page (which displays the form to create a new journey entity) the action of the form is simply "journeys" (I expected it to be "journeys/create"). The "journeys" route on its own would call the executeIndex method - however I put a log call in there and upon form submission, the log is not made. So this leads me to believe that executeIndex is NOT being called, and another piece of code is being fired upon form submission that then (depending on a hidden input in the form) calls either executeCreate() or executeUpdate(). Problem is, I don't know where that would be happening. Any insight would be much appreciated. I don't if this is relevant, but here is the routing definition for the journeys module journey: class: sfDoctrineRouteCollection options: model: journey module: journeys prefix_path: /journeys column: id with_wildcard_routes: true Thanks!

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  • How can I make a read-only ObservableCollection property?

    - by thrag
    I'd like to expose a property on a view model that contains a list of objects (from database). I need this collection to be read-only. That is, I want to prevent Add/Remove, etc. But allow the foreach and indexers to work. My intent is to declare a private field holding the editable collection and reference it with a read-only Public Property. As follows public ObservableCollection<foo> CollectionOfFoo { get { return _CollectionOfFoo; } } However, that syntax just prevents changing the reference to the collection. It doesn't prevent add/remove, etc. What is the right way to accomplish this?

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  • django filefield return filename only in template

    - by John
    I've got a field in my model of type FileField. This gives me an object of type type File, which has the following method: File.name: The name of the file including the relative path from MEDIA_ROOT. What I want is something like .filename that will only give me the filename and not the path as well something like: {% for download in downloads %} <div class="download"> <div class="title">{{download.file.filename}}</div> </div> {% endfor %} which would give something like myfile.jpg thanks

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  • Chaining Many-To-Many Dimensional Relationships in SSAS

    - by Ray Saltrelli
    I'm developing a cube in SSAS and attempting to model the following relationships: Many Facts to 1 Customer Many Customers to Many Sales Reps Many Sales Reps (Subordinates) to Sales Reps (Managers) Each M2M relationship is facilitated by a bridge table which also acts as a fact table in the cube I have most of this working. I can slice Facts by Customer and by Sales Rep (Subordinate), but when I add Sales Rep (Manager) to the query it appears to return every subordinate/manager combination regardless of whether or not that relationship exists in the bridge table. Any ideas as to what I might be doing wrong?

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  • Cakephp: Designpattern for creation of models in hasMany relationship

    - by Chris
    I have two Models: Car and Passenger. Car hasMany Passenger Passenger belongsTo Car I managed to create add functionailty for each model and managed to resolve the hasMany relationship between them. Now I'm trying to create a addCar function and view that allows the user to create a new car and automatically generate Passengers. I thought of something like this The view asks the user enter the car information The view has some field that allows to temporarly add new passengers and remove remove them When the user saves the new car, the entities for the passengers are created, the entity for the car is created and the passengers are linked to the car. If the user decides to cacnel everything, the DB remains unchanged. Now my question is: What is the best way to do this? Is there a pattern / tutorial to follow for such a entity and associated subentity creation? To clarify: The passengers associated with each car do not exist prior to the existence of the car.

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  • Can't update rows in my database using Entity Framework...?

    - by Dissonant
    Okay, this is really weird. I made a simple database with a single table, Customer, which has a single column, Name. From the database I auto-generated an ADO.NET Entity Data Model, and I'm trying to add a new Customer to it like so: using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace Test { class Program { static void Main() { Database1Entities db = new Database1Entities(); Customer c = new Customer(); c.Name = "Harry"; db.AddToCustomer(c); db.SaveChanges(); } } } But it doesn't persist Customer "Harry" to the database! I've been scratching my head for a while now wondering why such a simple operation doesn't work. What on earth could be the problem!?

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  • why is link generated in YUI javascript failing to render in rails?

    - by pmneve
    Using YAHOO.widget.treeview to generate a table with three levels of data: module, submodule, and detail. If there is an image associated with a detail row the javascript generates a link: "<td><a href=\"/screenshot/show/" + rowData.id + "\">Screenshot</a></td>" that is appended to the html for the row. The url is generated correctly and the link appears. When clicked nothing happens except the word 'Done' appears in the browser status bar. Am calling the very same url from another page that does not use javascript and the screenshot page appears as expected. Here is the controller. class ScreenshotController < ApplicationController def show if @detail.screen_path.length 1 @imagePath = "#{RAILS_ROOT}" + "/private/#{Company.find(@detail.company_id).subdir}/" + "#{Project.find(@detail.project_id).subdir}/screenshot/" + "#{@detail.screen_path}" send_file ( @imagePath, :type = 'image/jpeg', :disposition = 'inline') end end end A sample url: http://localhost:3004/screenshot/show/20854 This code from show.html.erb belonging to the detail model works: <%= link_to 'View', :controller = 'screenshot', :id = @detail.id, :action = 'show' % Any ideas???

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  • Rails: Best practice to store user settings?

    - by ole_berlin
    Hi, I'm wondering what the best way is to store user settings? For a web 2.0 app I want users to be able to select certain settings. At the moment is it only when to receive email notifications. The easiest way would be to just create a Model "Settings" and have a column for every setting and then have a 1-1 relationship with users. But is there a pattern to solve this better? Is it maybe better to store the info in the user table itself? Or should I use a table with "settings_name" and "settings_value" to be completely open about the type of settings stored there (without having to run any migrations when adding options)? What is your opinion? Thanks

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  • How to validate my Jquery Datepicker for some days.

    - by kumar
    $("input[id^='Date-<%=Model.ID%>']").datepicker({ duration: 0, buttonImage: '/Content/images/calender.gif', buttonImageOnly: true, showOn:'button', constrainInput: true, showTime: true, stepMinutes: 30, stepHours: 1, altTimeField: '', time24h: true, minDate: 0 }); I have this Calender Control I am using..user can select any date from the calender.. I need to validate the dates like Saturday and Sundays and 1/1 and 1/25.. if they select these days I need to show them Popup message not valid date? can anybody help me out.. thanks

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  • Cakephp: Access data in add function

    - by Chris
    I'm using the CakePHP blog example: function add() { if (!empty($this->data)) { if ($this->Post->saveAll($this->data)) { $this->Session->setFlash('Your post has been saved.'); $this->redirect(array('action' => 'index')); } }} I want to modify it in a way that the user is redirected to the post after adding it: But this doesn't work: $this->redirect(array('action' => 'view', $this->Post->id))); What is the correct way to read the model's data after creation?

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  • Designing server communications like DNS

    - by fryme
    I'm just need some help about server design. I need help in the design of the structure of the server application. Need to develop a network of servers that interact with each other. If a server receives a request and the server can not comply it, then the request is sent to another server and the result will be refunded to the sender. Information on all servers is different, and sender did not know where the result is placed in. The first thing that comes to mind is to use the model(scheme) of the DNS. But any interesting detailed articles on this subject I have not found. Any ideas?

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  • Getting the last element of a Postgres array, declaratively

    - by Wojciech Kaczmarek
    How to obtain the last element of the array in Postgres? I need to do it declaratively as I want to use it as a ORDER BY criteria. I wouldn't want to create a special PGSQL function for it, the less changes to the database the better in this case. In fact, what I want to do is to sort by the last word of a specific column containing multiple words. Changing the model is not an option here. In other words, I want to push Ruby's sort_by {|x| x.split[-1]} into the database level. I can split a value into array of words with Postgres string_to_array or regexp_split_to_array functions, then how to get its last element?

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  • Django form to enter/save html to database

    - by Ian
    I'm in my first week of Django development and am working on an admin page that will let me write some quick html using TinyMCE and then save it to the database. I don't need to display this web page on the site or add it to urls.py, etc. The html snippet will be loaded from the database and used in a view function. I've read in "Practical Django Projects" how to integrate TinyMCE, so my question is more concerned with the best approach for the form itself. Specifically: 1. Is there a built-in form like flatpage that works well for this? I only need one field in the form for the html. 2. How do I save the form's text after it's entered? I created a model with a JSONField to save the html in, but I'm not clear on what to do next. Thanks.

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  • RSpec View testing: How to modify params?

    - by sebastiangeiger
    I am trying to test my views with RSpec. The particular view that is causing me troubles changes its appearance depending on a url parameter: link_to "sort>name", model_path(:sort_by => 'name') which results in http://mydomain/model?sort_by=name My view then uses this parameter like that: <% if params[:sort_by] == 'name' %> <div>Sorted by Name</div> <% end %> The RSpec looks like this: it "should tell the user the attribute for sorting order" do #Problem: assign params[:sort_for] = 'name' render "/groups/index.html.erb" response.should have_tag("div", "Sorted by Name") end I would like to test my view (without controller) in RSpec but I can't get this parameter into my params variable. I tried assign in all different flavours: assign[:params] = {:sort_by => 'name'} assign[:params][:sort_by] = 'name' ... no success so far. Every idea is appreciated.

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  • How do I create another controller action to create an object in rails?

    - by Angela
    I have a model called Contact_Email. When an Email template is sent through ActionMailer to a specific Contact, as part of the Create action it sends it through upon .save. However, I want to create a "skip" action which also creates a Contact_Email, but does NOT send an ActionMailer and allows me to set the status differently. I want to create a separate action because I want to make this respond to a remote_for_tag so that I can just have an ajax button indicate it has been "skipped": Here's what I tried, but while it creates a Contact_Email, I end up getting an error when I want to go back and view all the Contacts again. def skip @contact_email = ContactEmail.new @contact_email.contact_id = params[:contact_id] @contact_email.email_id = params[:email_id] @contact_email.status = "skipped" if @contact_email.save flash[:notice] = "skipped email" redirect_to contact_emails_url end end

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  • Multiple databases support in Symfony

    - by Ngu Soon Hui
    I am using Propel as my DAL for my Symfony project. I can't seem to get my application to work across two or more databases. Here's my schema.yml: db1: lkp_User: pk_User: { type: integer, required: true, primaryKey: true, autoIncrement: true } UserName: { type: varchar(45), required: true } Password: longvarchar _uniques: Unique: [ UserName ] db2: tesco: Id: { type: integer, required: true, primaryKey: true, autoIncrement: true } Name: { type: varchar(45), required: true } Description: longvarchar And here's the databases.yml: dev: db1: param: classname: DebugPDO test: db1: param: classname: DebugPDO all: db1: class: sfPropelDatabase param: classname: PropelPDO dsn: 'mysql:dbname=bpodb;host=localhost' #where the db is located username: root password: #pass encoding: utf8 persistent: true pooling: true db2: class: sfPropelDatabase param: classname: PropelPDO dsn: 'mysql:dbname=mystore2;host=localhost' #where the db is located username: root password: #pass encoding: utf8 persistent: true pooling: true When I call php symfony propel-build-model, only db1 is generated, db2 is not. Any idea how to fix this problem?

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  • Storing task state between multiple django processes

    - by user366148
    I am building a logging-bridge between rabbitmq messages and Django application to store background task state in the database for further investigation/review, also to make it possible to re-publish tasks via the Django admin interface. I guess it's nothing fancy, just a standard Producer-Consumer pattern. Web application publishes to message queue and inserts initial task state into the database Consumer, which is a separate python process, handles the message and updates the task state depending on task output The problem is, some tasks are missing in the db and therefore never executed. I suspect it's because Consumer receives the message earlier than db commit is performed. So basically, returning from Model.save() doesn't mean the transaction has ended and the whole communication breaks. Is there any way I could fix this? Maybe some kind of post_transaction signal I could use? Thank you in advance.

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