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  • How to get Ponter/Reference semantics in Scala.

    - by Lukasz Lew
    In C++ I would just take a pointer (or reference) to arr[idx]. In Scala I find myself creating this class to emulate a pointer semantic. class SetTo (val arr : Array[Double], val idx : Int) { def apply (d : Double) { arr(idx) = d } } Isn't there a simpler way? Doesn't Array class have a method to return some kind of reference to a particular field?

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  • What VS 2010 Template to Chose?

    - by Dr Hydralisk
    I am just getting started with C++ and wanted to know does it really matter what template you chose in Visual Studio 2010 (for creating executables)? Like if I was creating a console application there is CLR Console Application, Win32 Console Application, and Win32 Project (description says it can be an application or a dll), what would I chose (or could i select Empty Project)?

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  • [Django] How do I filter the choices in a ModelForm that has a CharField with the choices attribute

    - by nubela
    I understand I am able to filter queryset of Foreignkey or Many2ManyFields, however, how do I do that for a simple CharField that is a Select Widget (Select Tag). For example: PRODUCT_STATUS = ( ("unapproved", "Unapproved"), ("approved", "Listed"), #("Backorder","Backorder"), #("oos","Out of Stock"), #("preorder","Preorder"), ("userdisabled", "User Disabled"), ("disapproved", "Disapproved by admin"), ) and the Field: o_status = models.CharField(max_length=100, choices=PRODUCT_STATUS, verbose_name="Product Status", default="approved") Suppose I wish to limit it to just "approved" and "userdisabled" instead showing the full array (which is what I want to show in the admin), how do I do it? Thanks!

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  • [Android] Putting Serializable Classes into SQL?

    - by CaseyB
    Here's the situation. I have a bunch of objects that implement Serializable that I want to store in a SQL database. I have two questions Is there a way to serialize the object directly into the database Is that the best way to do it or should I Write the object out to a formatting String and put it in the database that way and then parse it back out Write each member to the database with a field that is unique to each object

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  • Ruby on Rails: create records for multiple models with one form and one submit

    - by notblakeshelton
    I have a 3 models: quote, customer, and item. Each quote has one customer and one item. I would like to create a new quote, a new customer, and a new item in their respective tables when I press the submit button. I have looked at other questions and railscasts and either they don't work for my situation or I don't know how to implement them. I also want my index page to be the page where I can create everything. quote.rb class Quote < ActiveRecord::Base attr_accessible :quote_number has_one :customer has_one :item end customer.rb class Customer < ActiveRecord::Base #unsure of what to put here #a customer can have multiple quotes, so would i use: has_many :quotes #<----? end item.rb class Item < ActiveRecord::Base #also unsure about this #each item can also be in multiple quotes quotes_controller.rb class QuotesController < ApplicationController def index @quote = Quote.new @customer = Customer.new @item = item.new end def create @quote = Quote.new(params[:quote]) @quote.save @customer = Customer.new(params[:customer]) @customer.save @item = Item.new(params[:item]) @item.save end end items_controller.rb class ItemsController < ApplicationController def index end def new @item = Item.new end def create @item = Item.new(params[:item]) @item.save end end customers_controller.rb class CustomersController < ApplicationController def index end def new @customer = Customer.new end def create @customer = Customer.new(params[:customer]) @customer.save end end quotes/index.html.erb <%= form_for @quote do |f| %> <%= f.fields_for @customer do |builder| %> <%= label_tag :firstname %> <%= builder.text_field :firstname %> <%= label_tag :lastname %> <%= builder.text_field :lastname %> <% end %> <%= f.fields_for @item do |builder| %> <%= label_tag :name %> <%= builder.text_field :name %> <%= label_tag :description %> <%= builder.text_field :description %> <% end %> <%= label_tag :quote_number %> <%= f.text_field :quote_number %> <%= f.submit %> <% end %> When I try submitting that I get an error: Can't mass-assign protected attributes: item, customer So to try and fix it I updated the attr_accessible in quote.rb to include :item, :customer but then I get this error: Item(#) expected, got ActiveSupport::HashWithIndifferentAccess(#) Any help would be greatly appreciated.

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  • Form Search Onkeyup event

    - by Aryan
    I Have a Form In which the form should automatically search when i complete entering the 10th character in the text field but the below code is searching for each n every character i enter in the text field . . . I just want the result after completing the 10th character not for each n every character . . i have used onkeyup event and i set that value to 10 but still it is searching for each n every character... please do help me <body OnKeyPress="return disableKeyPress(event)"> <section id="content" class="container_12 clearfix" data-sort=true> <center><table class='dynamic styled with-prev-next' data-table-tools='{'display':true}' align=center> <script> function disableEnterKey(e) { var key; if(window.event) key = window.event.keyCode; //IE else key = e.which; //firefox return (key != 13); } function showUser(str) { if (str=="") { document.getElementById("txtHint").innerHTML=""; return; } if (window.XMLHttpRequest) {// code for IE7+, Firefox, Chrome, Opera, Safari xmlhttp=new XMLHttpRequest(); } else {// code for IE6, IE5 xmlhttp=new ActiveXObject("Microsoft.XMLHTTP"); } xmlhttp.onreadystatechange=function() { if (xmlhttp.readyState==4 && xmlhttp.status==200) { document.getElementById("txtHint").innerHTML=xmlhttp.responseText; } } xmlhttp.open("GET","resdb.php?id="+str,true); xmlhttp.send(); } </script> <script type='text/javascript'> //<![CDATA[ $(window).load(function(){ $('#id').keyup(function(){ if(this.value.length ==10) }); });//]]> </script> <form id="form" method="post" name="form" > <tr><td><p align="center"><font size="3"><b>JNTUH - B.Tech IV Year II Semester (R07) Advance Supplementary Results - July 2012</b></font></p></td></tr> <td><p align="center"><b>Last Date for RC/RV : 8th August 2012</b></p></td> <tr><td><p align="center"></b> <input type="text" onkeyup="showUser(this.value)" onKeyPress="return disableEnterKey(event)" data-type="autocomplete" data-source="extras/autocomplete1.php" name="id" id="id" maxlength="10" placeholder=" Hall-Ticket Number">&emsp;</p></td></tr> </table> </center> </form> <center> <div id="txtHint"><b>Results will be displayed here</b></div> </center> </body>

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  • Hint to MVC view generator for primary key on POCOs

    - by myotherme
    When generating a strongly-typed Index view for my model I always get the following: <%= Html.ActionLink("Edit", "Edit", new { /* id=item.PrimaryKey */ }) %> I am using a POCO class for use with our ORM. As I understand it when using LINQ to SQL the view code will know which field is the primary key. Is there a way that I can an attribute to the property (or class) that will let the View Generator know that the ID property if the primary key?

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  • When inheriting a control in Silverlight, how to find out if its template has been applied?

    - by herzmeister der welten
    When inheriting a control in Silverlight, how do I find out if its template has already been applied? I.e., can I reliably get rid of my cumbersome _hasTemplateBeenApplied field? public class AwesomeControl : Control { private bool _hasTemplateBeenApplied = false; public override void OnApplyTemplate() { base.OnApplyTemplate(); this._hasTemplateBeenApplied = true; // Stuff } private bool DoStuff() { if (this._hasTemplateBeenApplied) { // Do Stuff } } }

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  • Android Full Text Search

    - by Eduardo
    Does Android come with a way to do Full Text Search? I know is it not even possible to search contacts by the notes field, being Google the search company, but I would be disappointed if there is no API for that.

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  • Automatically POST on document creation

    - by ptikobj
    In an HTML-document, i want to have a (if possible: invisible) form that POSTs the contents of one text input field to my server as soon as the document is created or if possible within s seconds. The document is created via javascript's open. How can i do that?

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  • SQL Server varchar to datetime

    - by Dezigo
    I have a field varchar(14) = 20090226115644 I need convert it to - 2009-02-26 11:56:44 (datetime format) My idea. use cast and convert.. but I always have errors. Conversion failed when converting datetime from character string. I made this, but don`t like it.. SELECT SUBSTRING(move,1,4) + '-' + SUBSTRING(move,5,2) + '-' + SUBSTRING(move,7,2) + ' ' + SUBSTRING(move,9,2) + ':' + SUBSTRING(move,11,2) + ':'+SUBSTRING(move,13,2) as new -- FROM [Test].[dbo].[container_events] where move IS not null Result :2009-02-26 11:56:44

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  • Change cursor style in firefox input file tag

    - by JohnJ
    I have been trying to change the cursor style to look like a pointer rather than an I beam thing, but it looks like FF does not respect the cursor spec in an input file field. For example, I have made this small fiddle: http://jsfiddle.net/jDZtn/4/ where Id like the cursor to look like a pointer rather than an Ibeam when the user hovers over it. My end plan is to introduce opacity==0 and use a clickable button over it. I am not sure if this behaviour is a bug or not.

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  • Any way to make this PostgreSQL count query any faster?

    - by Ben Dauphinee
    I'm running a case-insensitive search on a table with 7.2 million rows, and I was wondering if there was any way to make this query any faster? Currently, it takes approx 11.6 seconds to execute, with just one search parameter, and I'm worried that as soon as I add more than one, this query will become massively slow. SELECT count(*) FROM "exif_parse" WHERE (description ~* 'canon')

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  • Your favorite Visual Basic 6 tools and tips

    - by Clay Nichols
    This is somewhat related to a similar post, but that post was Visual Studio 6 in general and a lot of the suggestions didn't apply to VB6. Suggest or vote for tools/tips. Please one tool/tip per post so that everyone can vote on them individually. Include a brief description of what the tools do.

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  • What is a good program for storing “chunks” of commonly used source code

    - by Rob Wiley
    I've looked at CodeLocker (poorly styled and relatively unflexible, but free) and Source Code Library (Overzone software - very nicely styled, looks flexible, but very expensive - $80). Ideally, I'm looking for a relatively simple, inexpensive program (not an online website) that I can save text data (source code) with a title and keywords, maybe even a description. It would also have some type of search functionality.

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  • Convert Object Hierachey to Object Array

    - by Killercam
    All, I want to create an object array foo[], where the constructor for Foo is public Foo(string name, string discription){} I have a database object which has a structure (not incuding stored procedures, functions or views for simplicity) like public class Database { public string name { get; set; } public string filename { get; set; } public List<Table> tables { get; set; } public Database(string name, string filename) { this.name = name; this.filename = filename; } } protected internal class Table { public string name { get; set; } public List<Column> columns { get; set;} public Table(string name, List<Column> columns) { this.name = name; this.columns = columns; } } protected internal class Column { public string name { get; set; } public string type { get; set; } public Column(string name, string type, int maxLength, bool isNullable) { this.name = name; this.type = type; } } I would like to know the quickest way to add Column and Table information to the Foo[] object array? Clearly I can do List<Foo> fooList = new List<Foo>(); foreach (Table t in database.tables) { fooList.Add(new Foo(t.Name, "Some Description")); foreach (Column c in t.columns) fooList.Add(new Foo(c.Name, "Some Description")); } Foo[] fooArr = fooList.ToArray<Foo>(); But is there a quicker way? Clearly LINQ is likely to be slower for a query that does a simalar operation, but I care allot about speed here so any advice would be appreciated. Perhaps the use of a HashSet would be the way to go as there will not be duplicate entries... Thanks for your time.

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  • Help with this JET Sql Query [SOLVED]

    - by yae
    Hi: I need help to do this query select. for example I have these fields: idInvoice date amount Depending of the date I need multiply the field "amount" for x number or other one. For example, if the date is less 01/01/2010 to multiply for 20 . But if it is major or equal to multiply for 35 Select idInvoice, date, amount, amount * varNumber from invoices

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  • InfoPath: How to display a third column of a datasource?

    - by Michael Bray
    I have an InfoPath 2007 browser-enabled form that has a datasource with three columns, let's say columns A, B, and C. I have a dropdown that is keyed to column A and displays column B. Column C contains some data that I want to display in an expression box, and that I also want to use in some data validation against another field on the form. I'm looking for some help on how to reference that column C for displaying and use in validation. Thanks!

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