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• What's wrong with cplusplus.com?

  - by Kerrek SB

  This is perhaps not a perfectly suitable forum for this question, but let me give it a shot, at the risk of being moved away. There are several references for the C++ standard library, including the invaluable ISO standard, MSDN, IBM, cppreference, and cplusplus. Personally, when writing C++ I need a reference that has quick random access, short load times and usage examples, and I've been finding cplusplus.com pretty useful. However, I've been hearing negative opinions about that website frequently here on SO, so I would like to get specific: What are the errors, misconceptions or bad pieces of advice given by cplusplus.com? What are the risks of using it to make coding decisions? Let me add this point: I want to be able to answer questions here on SO with accurate quotes of the standard, and thus I would like to post immediately-usable links, and cplusplus.com would have been my choice site were it not for this issue. Update: There have been many great responses, and I have seriously changed my view on cplusplus.com. I'd like to list a few choice results here; feel free to suggest more (and keep posting answers). As of June 29, 2011: Incorrect description of some algorithms (e.g. remove). Information about the behaviour of functions is sometimes incorrect (atoi), fails to mention special cases (strncpy), or omits vital information (iterator invalidation). Examples contain deprecated code (#include style). Inexact terminology is doing a disservice to learners and the general community ("STL", "compiler" vs "toolchain"). Incorrect and misleading description of the typeid keyword.

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• Workshop in Holland - and open questions

  - by Mike Dietrich

  Thanks to everybody visiting yesterday the Upgrade Workshop in Maarsen. I had lots of fun - and I hope you'd enjoy it, too :-) The slides, as always, can be downloaded from: http://apex.oracle.com/folien Use the Schluesselwort/Keyword: upgrade112 And thanks to all those of you sending feedback regarding "traget/destination" (will change it in the slides) and other topics such as Enterprise Manager Grid Control 11g. Enterprise Manager 11g will be launched on 22-APR-2010 - and you can join the event live if you will be accidentialy in New York:http://www.oracle.com/enterprisemanager11g/index.html Thanks for this hint!!! Regarding the open questions: Will there be PSUs available for Intel Solaris? PSUs will be made available on nearly all platforms including Intel Solaris. Please see Note:882604.1 for platform information and Note:854428.1 for direct links to the PSU download location. Is COMMIT_WRITE=NOWAIT the default in patch set 10.2.0.4? I tried to verify this and neither couldn't find a bug entry nor a documentation saying the 10.2.0.4 has a different default setting (default behaviour is WAIT). Checked it in my 10.2.0.4 instances as well and there it is set to WAIT. If this parameter is not explicitly specified, then database commit behavior defaults to writing commit records to disk before control is returned to the client. If only IMMEDIATE or BATCH is specified, but not WAIT or NOWAIT, then WAIT mode is assumed. If only WAIT or NOWAIT is specified, but not IMMEDIATE or BATCH, then IMMEDIATE mode is assumed Please feedback to me if you have different experiences. Service Request escalation by telephone? Thanks for this update - I didn't realize that ;-) Now I know why it hasn't helped last month when I've updated an SR ... here's the official information on that: Note:199389.1 - Note has been updated on 24-FEB-2010. See the telephone number to Oracle support to request an escalation here: http://www.oracle.com/support/contact.html

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• SQL SERVER- Differences Between Left Join and Left Outer Join

  - by pinaldave

  There are a few questions that I had decided not to discuss on this blog because I think they are very simple and many of us know it. Many times, I even receive not-so positive notes from several readers when I am writing something simple. However, assuming that we know all and beginners should know everything is not the right attitude. Since day 1, I have been keeping a small journal regarding questions that I receive in this blog. There are around 200+ questions I receive every day through emails, comments and occasional phone calls. Yesterday, I received a comment with the following question: What are the differences between Left Join and Left Outer Join? Click here to read original comment. This question has triggered the threshold of receiving the same question repeatedly. Here is the answer: There is absolutely no difference between LEFT JOIN and LEFT OUTER JOIN. The same is true for RIGHT JOIN and RIGHT OUTER JOIN. When you use LEFT JOIN keyword in SQL Server, it means LEFT OUTER JOIN only. I have already written in-depth visual diagram discussing the JOINs. I encourage all of you to read the article for further understanding of the JOINs: Read Introduction to JOINs – Basic of JOINs Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: Pinal Dave, PostADay, SQL, SQL Authority, SQL Joins, SQL Query, SQL Scripts, SQL Server, SQL Tips and Tricks, T SQL, Technology

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• What is the difference between String and string in C#

  - by SAMIR BHOGAYTA

  string : ------ The string type represents a sequence of zero or more Unicode characters. string is an alias for String in the .NET Framework. 'string' is the intrinsic C# datatype, and is an alias for the system provided type "System.String". The C# specification states that as a matter of style the keyword ('string') is preferred over the full system type name (System.String, or String). Although string is a reference type, the equality operators (== and !=) are defined to compare the values of string objects, not references. This makes testing for string equality more intuitive. For example: String : ------ A String object is called immutable (read-only) because its value cannot be modified once it has been created. Methods that appear to modify a String object actually return a new String object that contains the modification. If it is necessary to modify the actual contents of a string-like object Difference between string & String : ---------- ------- ------ - ------ the string is usually used for declaration while String is used for accessing static string methods we can use 'string' do declare fields, properties etc that use the predefined type 'string', since the C# specification tells me this is good style. we can use 'String' to use system-defined methods, such as String.Compare etc. They are originally defined on 'System.String', not 'string'. 'string' is just an alias in this case. we can also use 'String' or 'System.Int32' when communicating with other system, especially if they are CLR-compliant. I.e. - if I get data from elsewhere, I'd deserialize it into a System.Int32 rather than an 'int', if the origin by definition was something else than a C# system.

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• Thoughts on my new template language?

  - by Ralph

  Let's start with an example: using "html5" using "extratags" html { head { title "Ordering Notice" jsinclude "jquery.js" } body { h1 "Ordering Notice" p "Dear @name," p "Thanks for placing your order with @company. It's scheduled to ship on {@ship_date|dateformat}." p "Here are the items you've ordered:" table { tr { th "name" th "price" } for(@item in @item_list) { tr { td @item.name td @item.price } } } if(@ordered_warranty) p "Your warranty information will be included in the packaging." p(class="footer") { "Sincerely," br @company } } } The "using" keyword indicates which tags to use. "html5" might include all the html5 standard tags, but your tags names wouldn't have to be based on their HTML counter-parts at all if you didn't want to. The "extratags" library for example might add an extra tag, called "jsinclude" which gets replaced with something like <script type="text/javascript" src="@content"></script> Tags can be optionally be followed by an opening brace. They will automatically be closed as the closing brace. If no brace is used, they will be closed after taking on element. Variables are prefixed with the @ symbol. They may be used inside double-quoted strings. I think I'll use single-quotes to indicate "no variable substitution" like PHP does. Filter functions can be applied to variables like @variable|filter. Arguments can be passed to the filter @variable|filter:@arg1,arg2="y" Attributes can be passed to tags by including them in (), like p(class="classname"). Some questions: Which symbol should I use to prefix variables? @ (like Razor), $ (like PHP), or something else? Should the @ symbol be necessary in "for" and "if" statements? It's kind of implied that those are variables. Tags and controls (like if,for) presently have the exact same syntax. Should I do something to differentiate the two? If so, what? Do you like the attribute syntax? (round brackets) I'll add more questions in a few minutes, once I get some feedback.

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• Code Trivia #4

  - by João Angelo

  Got the inspiration for this one in a recent stackoverflow question. What should the following code output and why? class Program { class Author { public string FirstName { get; set; } public string LastName { get; set; } public override string ToString() { return LastName + ", " + FirstName; } } static void Main() { Author[] authors = new[] { new Author { FirstName = "John", LastName = "Doe" }, new Author { FirstName = "Jane", LastName="Doe" } }; var line1 = String.Format("Authors: {0} and {1}", authors); Console.WriteLine(line1); string[] serial = new string[] { "AG27H", "6GHW9" }; var line2 = String.Format("Serial: {0}-{1}", serial); Console.WriteLine(line2); int[] version = new int[] { 1, 0 }; var line3 = String.Format("Version: {0}.{1}", version); Console.WriteLine(line3); } } Update: The code will print the first two lines // Authors: Doe, John and Doe, Jane // Serial: AG27H-6GHW9 and then throw an exception on the third call to String.Format because array covariance is not supported in value types. Given this the third call of String.Format will not resolve to String.Format(string, params object[]), like the previous two, but to String.Format(string, object) which fails to provide the second argument for the specified format and will then cause the exception.

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• DevDays ‘00 The Netherlands day #2

  - by erwin21

  Day 2 of DevDays 2010 and again 5 interesting sessions at the World Forum in The Hague. The first session of the today in the big world forum theater was from Scott Hanselman, he gives a lap around .NET 4.0. In his way of presenting he talked about all kind of new features of .NET 4.0 like MEF, threading, parallel processing, changes and additions to the CLR and DLR, WPF and all new language features of .NET 4.0. After a small break it was ready for session 2 from Scott Allen about Tips, Tricks and Optimizations of LINQ. He talked about lazy and deferred executions, the difference between IQueryable and IEnumerable and the two flavors of LINQ syntax. The lunch was again very good prepared and delicious, but after that it was time for session 3 Web Vulnerabilities and Exploits from Alex Thissen. This was no normal session but more like a workshop, we decided what kind of subjects we discussed, the subjects where OWASP, XSS and other injections, validation, encoding. He gave some handy tips and tricks how to prevent such attacks. Session 4 was about the new features of C# 4.0 from Alex van Beek. He talked about Optional- en Named Parameters, Generic Co- en Contra Variance, Dynamic keyword and COM Interop features. He showed how to use them but also when not to use them. The last session of today and also the last session of DevDays 2010 was about WCF Best Practices from Gerben van Loon. He talked about 7 best practices that you must know when you are going to use WCF. With some quick demos he showed the problem and the solution for some common issues. It where two interesting days and next year i sure will be attending again.

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• Ruby on Rails - Belongs_to and Active Admin not creating foreign ID

  - by Milo

  I have the following setup: class Category < ActiveRecord::Base has_many :products end class Product < ActiveRecord::Base belongs_to :category has_attached_file :photo, :styles => { :medium => "300x300>", :thumb => "200x200>" } validates_attachment_content_type :photo, :content_type => /\Aimage\/.*\Z/ end ActiveAdmin.register Product do permit_params :title, :price, :slideshow, :photo, :category form do |f| f.inputs "Product Details" do f.input :title f.input :category f.input :price f.input :slideshow f.input :photo, :required => false, :as => :file end f.actions end show do |ad| attributes_table do row :title row :category row :photo do image_tag(ad.photo.url(:medium)) end end end index do column :id column :title column :category column :price do |product| number_to_currency product.price end actions end class ProductController < ApplicationController def create @product = Product.create(params[:id]) end end Every time I make a product item in activeadmin the category comes up empty. It wont populate the column category_id for the product. It just leaves it empty. What am I doing wrong?

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• MySQL – Beginning Temporary Tables in MySQL

  - by Pinal Dave

  MySQL supports Temporary tables to store the resultsets temporarily for a given connection. Temporary tables are created with the keyword TEMPORARY along with the CREATE TABLE statement. Let us create the temporary table named Temp CREATE TEMPORARY TABLE TEMP (id INT); Now you can find out the column names using DESC command DESC TEMP; The above returns the following result This table can be accessed only for the current connection and it can be used like a permanent table and automatically dropped when the connection is closed. However, you can not find temporary tables using INFORMATION_SCHEMA. TABLES system view. It will only list out the permanent tables. MySQL usually stores the data of temporary tables in memory and processed by Memory Storage engine. But if the data size is too large MySQL automatically converts this to the on – disk table and use MyISAM engine. You can also create a permanent table with the same name of a temporary table in the same connection. However the structure of permanent table is visible only if the temporary table with the same name is dropped. Let us create a permanent table with the same name Temp as below CREATE TABLE TEMP (id INT, names VARCHAR(100)); Now running the following command stills gives you the structure of the temporary table temp created earlier. DESC TEMP; You can drop the temporary table using DROP TEMPORARY TABLE command; DROP TEMPORARY TABLE TEMP; After you executed the temporary table, run the following command DESC TEMP; Now you will see the structure of the permanent table named temp In summary – If there is a Temporary Table in MySQL it gets first priority over the permanent table in the session. Reference: Pinal Dave (http://blog.sqlauthority.com)Filed under: MySQL, PostADay, SQL, SQL Authority, SQL Query, SQL Tips and Tricks, T SQL

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• Extreme Optimization – Curves (Function Mapping) Part 1

  - by JoshReuben

  Overview ·        a curve is a functional map relationship between two factors (i.e. a function - However, the word function is a reserved word). ·        You can use the EO API to create common types of functions, find zeroes and calculate derivatives - currently supports constants, lines, quadratic curves, polynomials and Chebyshev approximations. ·        A function basis is a set of functions that can be combined to form a particular class of functions.   The Curve class ·        the abstract base class from which all other curve classes are derived – it provides the following methods: ·        ValueAt(Double) - evaluates the curve at a specific point. ·        SlopeAt(Double) - evaluates the derivative ·        Integral(Double, Double) - evaluates the definite integral over a specified interval. ·        TangentAt(Double) - returns a Line curve that is the tangent to the curve at a specific point. ·        FindRoots() - attempts to find all the roots or zeroes of the curve. ·        A particular type of curve is defined by a Parameters property, of type ParameterCollection   The GeneralCurve class ·        defines a curve whose value and, optionally, derivative and integrals, are calculated using arbitrary methods. A general curve has no parameters. ·        Constructor params:  RealFunction delegates – 1 for the function, and optionally another 2 for the derivative and integral ·        If no derivative  or integral function is supplied, they are calculated via the NumericalDifferentiation  and AdaptiveIntegrator classes in the Extreme.Mathematics.Calculus namespace. // the function is 1/(1+x^2) private double f(double x) {     return 1 / (1 + x*x); }   // Its derivative is -2x/(1+x^2)^2 private double df(double x) {     double y = 1 + x*x;     return -2*x* / (y*y); }   // The integral of f is Arctan(x), which is available from the Math class. var c1 = new GeneralCurve (new RealFunction(f), new RealFunction(df), new RealFunction(System.Math.Atan)); // Find the tangent to this curve at x=1 (the Line class is derived from Curve) Line l1 = c1.TangentAt(1);

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• SQL SERVER – Difference between COUNT(DISTINCT) vs COUNT(ALL)

  - by pinaldave

  This blog post is written in response to the T-SQL Tuesday hosted by Jes Schultz Borland. Earlier today, I was presenting a 45-minute session at the Community College about “The Beginning SQL Server Database”. One of the students asked me the following question. What is the difference between COUNT(DISTINCT) vs COUNT(ALL)? I found this question from the student very interesting. He seems to have read the documentation (Book Online) and was then asking me this question. I always carry laptop which has SQL Server installed. I quickly opened it and ran the following script. After looking at the result, I think it was clear to everybody. Here is the script: SELECT COUNT([Title]) Value FROM [AdventureWorks].[Person].[Contact] GO SELECT COUNT(ALL [Title]) ALLValue FROM [AdventureWorks].[Person].[Contact] GO SELECT COUNT(DISTINCT [Title]) DistinctValue FROM [AdventureWorks].[Person].[Contact] GO The above script will give me the following results. You can clearly notice from the result set that COUNT (ALL ColumnName) is the same as COUNT(ColumnName). The reality is that the “ALL” is actually  the default option and it needs not to be specified. The ALL keyword includes all the non-NULL values. I know this is very simple and may be it does not change how we work; however looking at the whole angle, I really enjoyed the question. Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: Pinal Dave, PostADay, SQL, SQL Authority, SQL Query, SQL Scripts, SQL Server, SQL Tips and Tricks, SQLAuthority News, T SQL, Technology

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• Why is TDD not working here?

  - by TobiMcNamobi

  I want to write a class A that has a method calculate(<params>). That method should calculate a value using database data. So I wrote a class Test_A for unit testing (TDD). The database access is done using another class which I have mocked with a class, let's call it Accessor_Mockup. Now, the TDD cycle requires me to add a test that fails and make the simplest changes to A so that the test passes. So I add data to Accessor_Mockup and call A.calculate with appropriate parameters. But why should A use the accessor class at all? It would be simpler (!) if the class just "knows" the values it could retrieve from the database. For every test I write I could introduce such a new value (or an if-branch or whatever). But wait ... TDD is more. There is the refactoring part. But that sounds to me like "OK, I can do this all with a big if-elseif construct. I could refactor it using a new class ... but instead I make use of the DB accessor and do this in a totally different way. The code will not necessarily look better afterwards but I know I WANT to use the database".

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• C # - a variable using the Encrypt md5

  - by Guilherme Cardoso

  When we are dealing with more sensitive data and important as a keyword, it is not appropriate at all stores them in database without encrypting for security reasons.  For this we use MD5  MD5 is an algorithm that allow us to encript an string, but doesn't leave us desencrypt it (not sure if it is already possible, but at least I know there are many databases already having a record).  The method below will return us a variable encrypted with md5. For example: md5_encriptar (pontonetpt.com ");   The result will be: 34efe85d338075834ad41803eb08c0df This way we save tthese encrypted data into a database, and then to make comparisons we often use the method to compare with the records kept. public string md5_encrypt(string md5) { System.Security.Cryptography.MD5CryptoServiceProvider x = new System.Security.Cryptography.MD5CryptoServiceProvider(); byte[] bs = System.Text.Encoding.UTF8.GetBytes(md5); bs = x.ComputeHash(bs); System.Text.StringBuilder s = new System.Text.StringBuilder(); foreach (byte b in bs) { s.Append(b.ToString("x2").ToLower()); } string password = s.ToString(); return password; }

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• EVENT RECAP: Oracle Day & Product Fair - Atlanta

  - by cwarticki

  Are you attending any of the Oracle Days and other Events? They are fantastic!  Keep track of the Oracle Events by following @OracleEvents on Twitter.  Also, stay in the know by subscribing to one of the several Oracle Newsletters. Those will also keep you posted of upcoming in-person and webcast events. From the Oracle Events website, simply navigate to your geography and refine your options to locate what interests you. You can also perform keyword searches. Yesterday, I had the opportunity to participate in the Oracle Day & Product Fair in Atlanta, Georgia.  Thanks to those who stopped by to ask your support questions and watch me demo My Oracle Support features and best practices. It was a fantastic turnout.  The Buckhead Theatre provided served as an excellent venue. It was standing room only for the double keynotes on topics of interest to our customers: Navigating Complexity by Simplifying I.T., and Oracle Exadata X3-Transforming Data Management. The Product Fair was staffed by many Oracle professionals and our Partners too.  It was great meeting new people like the team representing OAUG.  Many thanks to our sponsors: BIAS, Cloudera, Intel and TekStream Solutions.Come attend one of the many Oracle Days & other events planned for you. I'll be attending the one Ft. Lauderdale, FL on November 16th. See you there. -Chris WartickiGlobal Customer Management

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• New PeopleSoft Applications Search

  - by Matthew Haavisto

  As you may have seen from the PeopleTools 8.52 Release Value Proposition , PeopleTools intends to introduce a new search capability in release 8.52. We believe this feature will not only improve the ability of users to find content, but will fundamentally change the way people navigate around the PeopleSoft ecosystem. PeopleSoft applications will be delivering this new search in coming releases and feature packs. PeopleSoft Application Search is actually a framework—a group of features that provides an improved means of searching for a variety of content across PeopleSoft applications. From a user experience perspective, the new search offers a powerful, keyword-based search presented in a familiar, intuitive user experience. Rather than browsing through long menu hierarchies to find a page, data item, or transaction, users can use PeopleSoft Application Search to directly navigate to desired locations. We envision this to be similar to how people navigate across the internet. This capability may reduce or even eliminate the need to navigate PeopleSoft applications using the existing application menu system (though menus will still be available to people that prefer that method). The new search will be available at any point in an application and can be configured to span multiple PeopleSoft applications. It enables users to initiate transactions or navigate to key information without using the PeopleSoft application menus. In addition, filters and facets will enable people to narrow their search results sets, making it easier to identify and navigate to desired application content. Action menus are embedded directly in the search results, allowing users to navigate straight to specific related transactions – pre-populated with the selected search results data. PeopleSoft Applications Search framework uses Oracle’s Secure Enterprise Search as its search engine. Most Customers will benefit from the new search when it is delivered with applications. However, customers can start deploying it after a Tools-only upgrade. In this case, however, customers would have to create their own indices and implement security.

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• using cin and cout in textmate [migrated]

  - by That Guy

  I am usually a Java programmer, and have used textmate for that almost exclusively, but lately I started using C++ with it. but when i use even the most basic programs and incorporate the cin keyword, and run the program, I dont get an oppurtunity to put in anything during runtime and sometimes it inserts random values by itself! for example, if i ran this in textmate: #include <iostream> int stonetolb(int); int main() { using namespace std; int stone; cout << "enter the weight in stone"; cin >> stone; int pounds = stonetolb(stone); cout << stone << "stone = "; cout << pounds <<" pounds."; return 0; } int stonetolb(int sts) { return 14 * sts; } I would come out with the output: enter the weight in stone32767stone = 458738 pounds. Why is this happening, and how do I stop it?

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• How do I get google to see keywords on a one page web application site?

  - by David

  I'm going to have to link to the web site to explain this, http://www.diagram.ly, it's a free service, so I hope this doesn't break advertising rules. Basically, it's a one page web application, I don't want to create a web site for it. Some background text loads and if JavaScript is enabled, the web application itself then loads. The problem is that Google only seems to be picking up the title of the page and the text on the footer, so the site only appear on Google search for very limited text (based on the title and meta description mostly). I was hoping that search engines would pick up on the background text and index that. The text is factual, not keyword stuffed. Yahoo seems to pick up the text, just not Google. Does anyone have any experience of how Google would view such a site and where I could put the text for a better result? Edit I should mention that Google Webmaster Tools lists the site keywords as "Component, diagramly, feed, mxgraph, share and twitter". Basically the footer and little else.

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• C# Role Provider for multiple applications

  - by Juventus18

  I'm making a custom RoleProvider that I would like to use across multiple applications in the same application pool. For the administration of roles (create new role, add users to role, etc..) I would like to create a master application that I could login to and set the roles for each additional application. So for example, I might have AppA and AppB in my organization, and I need to make an application called AppRoleManager that can set roles for AppA and AppB. I am having troubles implementing my custom RoleProvider because it uses an initialize method that gets the application name from the config file, but I need the application name to be a variable (i.e. "AppA" or "AppB") and passed as a parameter. I thought about just implementing the required methods, and then also having additional methods that pass application name as a parameter, but that seems clunky. i.e. public override CreateRole(string roleName) { //uses the ApplicationName property of this, which is set in web.config //creates role in db } public CreateRole(string ApplicationName, string roleName) { //creates role in db with specified params. } Also, I would prefer if people were prevented from calling CreateRole(string roleName) because the current instance of the class might have a different applicationName value than intended (what should i do here? throw NotImplementedException?). I tried just writing the class without inheriting RoleProvider. But it is required by the framework. Any general ideas on how to structure this project? I was thinking make a wrapper class that uses the role provider, and explicitly sets the application name before (and after) and calls to the provider something like this: static class RoleProviderWrapper { public static CreateRole(string pApplicationName, string pRoleName) { Roles.Provider.ApplicationName = pApplicationName; Roles.Provider.CreateRole(pRoleName); Roles.Provider.ApplicationName = "Generic"; } } is this my best-bet?

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• #altnetseattle &ndash; MEF, What is it?

  - by GeekAgilistMercenary

  I dived into the MEF session with Glenn Block, Sourabh Mathur, Brian Henderson, and others.  Glenn covered the basic architectural ideas of MEF and then dived into a few examples. Is a framework around decoupling components. Built around the idea of discoverable type systems. Traditional extensibility mechanisms have a host and the respective extensions, commonly linking these two aspects with a form of registration. MEF removes the need for the registration part of the architecture and uses a contract. At some point with MEF you get down to parts, which removes even the complexity of a host or extensions, but a truly evolvable architecture based on natural growth of parts. Also referred to as the framework that removes the "new" keyword. The idea is that parts pull together other parts that they need.  Between each part is a contract. Each part has imports or exports for the parts it needs or the things it offers. If one checks out the MEF Codeplex Site you will find a host of additional information.  The framework download also has some decent examples that help one get kick started.

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• Hidden web standards behind Google "custom searchEngines"?

  - by Hoàng Long

  Today while playing with Google Chrome Omnibox, I notice a strange behavior. I guess there's some "hidden" web standard behind it, but can't figure it out. Here's how to reproduce: Go to http://edition.cnn.com/ Use the search function at the higher right corner, Search a random keyword, for example: "abc" Close the tabs. Open a new tab, type until Chrome reminds you about http://edition.cnn.com/, then press "Tab" The Omnibox now shows "Search CNN.com"! And when you type "abc" and press Enter, it uses the CNN search function to do the job, not Google! I also tried it for several different sites. To some it won't work. But to some sites, like CNN, vnexpress.net, it works after I use the search function of that site once. I also learnt about chrome://settings/searchEngines (type it in your chrome box and you will see), and learnt about you can add custom search engine in chrome. But the question is, why Chrome can realize the search URL automatically to some pages, and not others? It's not because some site subscribe to Google service, because I can do the same method for my site (http://ledohoanglong.wordpress.com), and I'm sure that there's no subscription. So I guess there's a method to "expose" the search function of a site, so that Google Chrome can catch it (after I call the search function of that site once, of courses). Does anyone know about how it works behind the scene?

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• My boss has a different idea of a website's UX [migrated]

  - by NicoJuicy

  Let me explain the situation. I started transforming a "old (.Net 2.0)" Application into a webapplication. Problem here is, that no-one here is really acquainted with the UX of a website (Simple, efficient). Eventhough, i still have to regard that the website can be tailored to a customer needs through parameters (yeah, i know :s ) For example: I wanted to have a layout similar to invoicemachine (= as simple as possible). -- He wants a Ribbon toolbar. Going to a supplier gives the list of supplier -- He wants to display the "Create Supplier" screen where you can use the wildcards in a certain textbox, to search for a specific Supplier and then give the list of the suppliers. Also, i need 4 search/filter mechanisms: people can search per field with wildmarks can filter the suppliers search a keyword through all the data of a supplier filter the "list Suppliers" page by the first letter of the name. LIST Suppliers | A | D | Z Adam Wrincle ADD |EDIT |Delete Damzel InDistress ADD |EDIT |Delete Zorro ADD |EDIT |Delete I can't seem to get through to him, that the UX of a website needs to be differently than a Windows Application. If he wants to bring all the logic of the windows app into a website, why letting me build a website then? Stick to the old solution. Am i mistaking so hard or how could i convince / show him that an online-solution is something different than the offline solution. He already "saw" online solutions of other applications to get an idea, but if i suggest something he won't listen (if it's GUI / UX related, that is).

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• Staying OO and Testable while working with a database

  - by Adam Backstrom

  What are some OOP strategies for working with a database but keeping thing testable? Say I have a User class and my production environment works against MySQL. I see a couple possible approaches, shown here using PHP: Pass in a $data_source with interfaces for load() and save(), to abstract the backend source of data. When testing, pass a different data store. $user = new User( $mysql_data_source ); $user-load( 'bob' ); $user-setNickname( 'Robby' ); $user-save(); Use a factory that accesses the database and passes the result row to User's constructor. When testing, manually generate the $row parameter, or mock the object in UserFactory::$data_source. (How might I save changes to the record?) class UserFactory { static $data_source; public static function fetch( $username ) { $row = self::$data_source->get( [params] ); $user = new User( $row ); return $user; } } I have Design Patterns and Clean Code here next to me, but I'm struggling to find applicable concepts.

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• Preview Chitika Premium Ads On Your Website Quickly

  - by Gopinath

  Google AdSense is an excellent option for publishers like us to monetize traffic. As Google AdSense allow only 3 ad units per page, we have good amount of space left empty on the blog. Why not we use this empty space to earn some revenue(make sure that you are not annoying your visitors with too many ads)? On Tech Dreams today we started experimenting with Chitika Premium Ads to displays advertisements for visitors landing on us through search engines. Chitika Premium Ads are displayed only to US visitors who finds our pages through search engines. Visitors from outside USA does not see these ads anywhere on our site. We being in India, how to preview the Chitika ads on our site? To preview Chitika ads add #chitikatest at the end of the url. For example to preview the ads on Tech Dreams I use the url http://techdreams.org/#chitikatest The above url displays default list of ads Chitika displays. But if you want to see preview of ads for a specific keyword you can append it at the end of the url. Here is another example http://www.techdreams.org/#chitikatest=ipad   Do You Know What The Word “Chitika” Means? What does Chitika mean? When Chitika co-founders, Venkat Kolluri and Alden DoRosario left Lycos in 2003 to start their own company, they sought a name that would suggest the speed with which its customers would be able to put up ads on their Web sites. Chitika, which means “snap of the fingers” in Telugu (a South Indian language), captured this sentiment and Chitika Inc. was born (via) This article titled,Preview Chitika Premium Ads On Your Website Quickly, was originally published at Tech Dreams. Grab our rss feed or fan us on Facebook to get updates from us.

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• Is it possible to implement an infinite IEnumerable without using yield with only C# code?

  - by sinelaw

  This isn't a practical problem, it's more of a riddle. Problem I'm curious to know if there's a way to implement something equivalent to the following, but without using yield: IEnumerable<T> Infinite<T>() { while (true) { yield return default(T); } } Rules You can't use the yield keyword Use only C# itself directly - no IL code, no constructing dynamic assemblies etc. You can only use the basic .NET lib (only mscorlib.dll, System.Core.dll? not sure what else to include). However if you find a solution with some of the other .NET assemblies (WPF?!), I'm also interested. Don't implement IEnumerable or IEnumerator. Notes The closest I've come yet: IEnumerable<int> infinite = null; infinite = new int[1].SelectMany(x => new int[1].Concat(infinite)); This is "correct" but hits a StackOverflowException after 14399 iterations through the enumerable (not quite infinite). I'm thinking there might be no way to do this due to the CLR's lack of tail recursion optimization. A proof would be nice :)

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• Page Titles - Including gender of a fashion product in page titles?

  - by Cedric

  I need a bit of help to decide whether it is worth including gender in page titles. In the webmaster tools: I looked at our search queries that include "women", and they account for 9% of our total search queries for the site. I am wondering if it is the right way assess the benefit of including "woman" or "men" in page titles, looking at it with existing results pointing to us already? Is there another tool that I can check the actual queries that may not include us in search results? Like google insights maybe? http://www.google.com/insights/search/#q=shoes%2Cshoes%20for%20women&cmpt=q So it looks like 1.1% of searches for "shoes" are also "shoes for women" is that correct? As a direct comparison, doing the same analysis on our own search queries, I get 1.8% when comparing "shoes for women" to "shoes" Implementing this automation would probably affect 99% of our site if not more, splitting it in 2 segments (one portion of page titles including "women" and the other including "men") Will doing so create a massively repetitive keyword throughout the site, hurting SEO? http://support.google.com/webmasters/bin/answer.py?hl=en&answer=35624 (see "Avoid repeated or boilerplate titles.")

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