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• Converting a year from 4 digit to 2 digit and back again in C#

  - by Mike Wills

  My credit card processor requires I send a two-digit year from the credit card expiration date. Here is how I a currently processing: I put a DropDownList of the 4-digit year on the page. I validate the expiration date in a DateTime field to be sure that the expiration date being passed to the CC processor isn't expired. I send a two-digit year to the CC processor (as required). I do this via a substring of the value from the year DDL. Is there a method out there to convert a four-digit year to a two-digit year. I am not seeing anything on the DateTime object. Or should I just keep processing it as I am?

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• Hibernate and stored procedures

  - by cc96ai

  As my understanding on setting hibernate, I need to create table meta data file (person.hbm.xml), include all the fields mapping java object (person.java) If we use stored procedures for all transaction, do we still need the above configuration? It seems hibernate and stored procedures will overlap, We set up the stored procedure because we don't want the to developer know all the field in db. If tables change, then we need update above files. Does it mean if we purely use stored procedure, we should just go for JDBC? If hibernate, we should stay in HQL?

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• More complex view matrix calculation required to composite 3d models with 2d video

  - by lzcd

  I'm utilising some 2d / 3d tracking data (provided by pfHoe) to help integrate some 3d models into the playback of some 2d video. Things are working.... okay... but there's still some visible 'slipping' of the models against the video background and I suspect this is may be because the XNA CreatePerspective helper method isn't taking into account some of the additional data supplied by pfHoe such as independent horizontal / vertical field of view angles and focal length. Would anyone be able to point me towards some examples of constructing view matrices that include such details?

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• DataFormatString in my Gridview does not work in SharePoint

  - by Etienne

  I have a ASP.NET GridView that i created on a page through SharePoint Designer 2007. For some reason it just does not want to work, why is that and how can i Fix it? Funny thing, it worked on another SharePoint Server but not on the one i am working on now, so i know my code is fine, it must be something ells on the SharePoint Server maybe? My Currency DataFormatStrings also dont want to work on my current SharePoint Server. My DataFormatString for my Date field <asp:BoundField DataField="c505_remdate" HeaderText="Remit. Advice Date" SortExpression="c505_remdate" DataFormatString="{0:d/MM/yyyy}" /> Thanks in advanced!!

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• Inserting Newline from XML to Database

  - by blackmage

  I am trying to parse this xml document in which a newline is required for certain fields and must be inserted into the database with the newline. But I've been running into problems. 1)First Problem: \n Character The first problem I had was using the \n like below. <javascript>jquery_ui.js\nshadowbox_modal.js\nuser_profile.js\ntablesorter.js</javascript> The problem was in the database the field came out ot be jquery_ui.js\nshadowbox_modal.js\n... and when output into html it was jquery_ui.jsnshadowbox_modal.jsn............... 2) Then I tried actually having newlines in the xml <javascript>jquery_ui.js shadowbox_modal.js user_profile.js tablesorter.js</javascript> The problem was the output become %20%20%20%20%20%20%20%20%20%20shadowbox_modal.js, and so forth. So how can I get a newline to hold from xml when entered into a database and then output with the newline still?

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• Drupal join on taxonomy terms

  - by ciscoheat

  I have a Drupal setup like this: Content type: Apartments Vocabulary: Areas, that can be used with Apartments. Content type: User profile, with a Content Taxonomy Field for Areas so users can select what areas they are interested in. I would like a view that shows all the user profiles that matches the apartments in their area. A "User profile <- Areas <- Apartments" join in other words. I've been mucking around with the views interface for a while but it's not clear to me how the relations can be setup to achieve this. Can someone give me a hint? In case this cannot be easily solved with views, what is a good way of doing it otherwise? Thanks for your help.

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• Programming advice - Which Loops?

  - by GaxZE

  Theres no easy way to say this so ill just say it in the form of a story. Im looking for advice on which loops and where. Here goes: out of 200-odd fields in the database, i need to run the following against each field. extract allowed values using extract function place allowed values into an array loop the array to be inserted into a db table first check records dont already exist. if they dont exist insert into table. ive found myself playing with this for the past two days and getting tangled and tangled in loops. wondering if anybody can guide.

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• mysql query performance help

  - by Stefano

  Hi I have a quite large table storing words contained in email messages mysql> explain t_message_words; +----------------+---------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | +----------------+---------+------+-----+---------+----------------+ | mwr_key | int(11) | NO | PRI | NULL | auto_increment | | mwr_message_id | int(11) | NO | MUL | NULL | | | mwr_word_id | int(11) | NO | MUL | NULL | | | mwr_count | int(11) | NO | | 0 | | +----------------+---------+------+-----+---------+----------------+ table contains about 100M rows mwr_message_id is a FK to messages table mwr_word_id is a FK to words table mwr_count is the number of occurrencies of word mwr_word_id in message mwr_message_id To calculate most used words, I use the following query SELECT SUM(mwr_count) AS word_count, mwr_word_id FROM t_message_words GROUP BY mwr_word_id ORDER BY word_count DESC LIMIT 100; that runs almost forever (more than half an hour on the test server) mysql> show processlist; +----+------+----------------+--------+---------+------+----------------------+----------------------------------------------------- | Id | User | Host | db | Command | Time | State | Info +----+------+----------------+--------+---------+------+----------------------+----------------------------------------------------- processlist | 41 | root | localhost:3148 | tst_db | Query | 1955 | Copying to tmp table | SELECT SUM(mwr_count) AS word_count, mwr_word_id FROM t_message_words GROUP BY mwr_word_id | +----+------+----------------+--------+---------+------+----------------------+----------------------------------------------------- 3 rows in set (0.00 sec) Is there anything I can do to "speed up" the query (apart from adding more ram, more cpu, faster disks)? thank you in advance stefano

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• Correct sequence of actions when using Markdown & MySQL?

  - by Andrew Heath

  I want my users to be able to write an article in Markdown, have it stored in the MySQL database (with the option to edit it in the future), and displayed for other users. In practice, this is my understanding of how it works: INPUT user input via HTML form using Markdown syntax $queryInput = mysql_real_escape_string($userInput); insert sanitized string into database OUTPUT query field from database $output = Markdown($queryResult); display $output Is that it? Does PHP Markdown preclude the need for htmlspecialchars or Pure HTML ? Thanks!

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• How would you communicate with aliens as a computer scientist?

  - by Pyrolistical

  Let's say aliens arrive on Earth and instead of just sending mathematicians and linguistic experts governments around the work decide to send an expert of major field. After a quick round of sorting you are paired up with an alien computer scientist. Given you don't understand each others language how would you using computer science to start the ground work of communication? eg. We know binary is universal, but not the way we write it. The symbols are not universal nor is the the direction we write it (MSB vs LSB and left vs right) Assume aliens are "similar" to us physically it won't impede visual communication.

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• What skills are needed to be successful at robotics?

  - by Click Upvote

  I'm considering studying to be a robotics engineer. The desire to work in that field is definitely there.. but I'm wondering what my chances of success would be. Generally I'm good with mental tasks of any sort such as programming, maths, physics, etc, and I think i'd be able to do electrical work such as soldering wires, changing batteries, etc. However, I'm not so good with things of a physical nature where I have to use my hands. For example, if you give me some vegetables to slice and dice, all of them will be diced un-evenly and some will look ugly. This might be because I have poor mind-hand coordination or because of a lack of concentration. Thoughts?

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• Parsing String to Time and insert in mysqldatabase

  - by kawtousse

  Goal: Parse a string from an input type text into TIME type to be inserted in MYSQL Database. String start= request.getParameter("startp"); System.out.println("start:" +start); SimpleDateFormat sdf = new SimpleDateFormat("HH:mm:ss"); long ms=0; try { ms = sdf.parse(start).getTime(); System.out.println(" the value of ms is:" +ms); } catch (ParseException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } Time ts = new Time(ms); System.out.println("the value of ts is:" +ts); start:14:12 (value witch i entered actually in the form at the start field named startp) the value of ts is :01:00:00 java.text.ParseException: Unparseable date: "14:12" at java.text.DateFormat.parse(Unknown Source) ms not displayed I ensure that database type of the following parameter is TIME. Thanks.

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• Build a HyperLink in a GridView in ASP.NET webforms - Eval not working

  - by MarceloRamires

  I have a gridview with a template field that has a HyperLink: <asp:TemplateField ItemStyle-Width="12%" HeaderText="VER" HeaderStyle-HorizontalAlign="Center" SortExpression="Ver" ItemStyle-HorizontalAlign="Center"> <ItemTemplate> <asp:HyperLink ID="HyperLink1" NavigateUrl="~/Admin/Teste/Teste.aspx?rac=<%#Eval('idApontamento')%>" runat="server">TEXT</asp:HyperLink> </ItemTemplate> </asp:TemplateField> I am getting The server tag is not well formed. in the HyperLink line. What should I do in order to directly build a querystring in a HyperLink ?

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• More specific NSNumberFormatter failure behaviour

  - by Volte

  I have an NSTextField into which I need the user to enter a number between a max and min, and it would be nice if I could detect when the NSNumberFormatter fails that particular test so I can either display a nicer message ("The number is too large" is not very helpful, it needs to display the valid range) or simply set the field automatically to the nearest valid value. I've looked at the NSTextField delegate's -control:didFailToFormatString:errorDescription: method which doesn't seem to allow you to modify the error, and I've looked at overriding the NSNumberFormatter's -getObjectValue:forString:range:error: method which does give me an NSError that I can modify, but there doesn't seem to be any way to determine which specific error was returned. Since I am just entering a simple integer, I don't need most of the functionality in NSNumberFormatter, would I be better off just writing my own formatter from scratch?

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• What is a programmer's life like?

  - by Zee JollyRoger

  Imagine like an 8-hour long video of any "typical/average" programming job. What is it like? Before I get myself involved in that path, what can I expect? I am interested in gathering first-hand information and accounts of the typical life of a programmer. My goal is to grasp the fundamental concepts of working in the professional field of programming. I just want to "see" into what it is/means to come to an entry-level programming job and program. See what kind of skills, mentality, expectations, and such are required.

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• Implementing website messaging services

  - by Alex

  There's a website which currently has only web interfaces for all the users. However, new requirement has emerged which says that there is a need in providing an alternative interface for a certain group of website users who want to regularly receive pushed notifications(messages) that would inform them about new events(news) in their field of interest. What sort of interface would it be?Is it all about using a MOM(message-oriented middleware) like JMS and deploying it withing an application server on a website using publish/subscribe model?Is it the correct way how to meet these sort of requirements?And if it's not a web-based interface,would kind of interface would it be then for the users? Thanks

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• Guiding a Robot Through a Path

  - by Hamza Yerlikaya

  I have a field filled with obstacles, I know where they are located, and I know the robot's position. Using a path-finding algorithm, I calculate a path for the robot to follow. Now my problem is, I am guiding the robot from grid to grid but this creates a not-so-smooth motion. I start at A, turn the nose to point B, move straight until I reach point B, rinse and repeat until the final point is reached. So my question is: What kind of techniques are used for navigating in such an environment so that I get a smooth motion? The robot has two wheels and two motors. I change the direction of the motor by turning the motors in reverse. EDIT: I can vary the speed of the motors basically the robot is an arduino plus ardumoto, I can supply values between 0-255 to the motors on either direction.

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• Sql Paging/Sorting - Efficent method with dynamic sort?

  - by dmose

  I'm trying to implement this style of paging: http://www.4guysfromrolla.com/webtech/042606-1.shtml CREATE PROCEDURE [dbo].[usp_PageResults_NAI] ( @startRowIndex int, @maximumRows int ) AS DECLARE @first_id int, @startRow int -- A check can be added to make sure @startRowIndex isn't > count(1) -- from employees before doing any actual work unless it is guaranteed -- the caller won't do that -- Get the first employeeID for our page of records SET ROWCOUNT @startRowIndex SELECT @first_id = employeeID FROM employees ORDER BY employeeid -- Now, set the row count to MaximumRows and get -- all records >= @first_id SET ROWCOUNT @maximumRows SELECT e.*, d.name as DepartmentName FROM employees e INNER JOIN Departments D ON e.DepartmentID = d.DepartmentID WHERE employeeid >= @first_id ORDER BY e.EmployeeID SET ROWCOUNT 0 GO This method works great, however, is it possible to use this method and have dynamic field sorting? If we change this to SELECT e.*, d.name as DepartmentName FROM employees e INNER JOIN Departments D ON e.DepartmentID = d.DepartmentID WHERE employeeid >= @first_id ORDER BY e.FirstName DESC It breaks the sorting... Is there any way to combine this method of paging with the ability to sort on different fields?

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• Unable to delete oldest table partition - Oracle 11g

  - by poijoi

  Hi, I'm using the 11g interval partitioning feature in one of my tables. I set it up to create 1 day partitions on a timestamp field and created a job to delete data 3 months old. When I try to delete the oldest partition I get the following error: ORA-14758: Last partition in the range section cannot be dropped I would have thought that "Last" refers to the newest partition and not the oldest. How should I interpret this error? Is there something wrong with my partitions or should I in fact keep the oldest partition there at all time? Thanks in advance, PJ

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• [AS3] htmlText not showing bold or italics font

  - by Conor

  So I have a MovieClip asset with a dynamic textfield sitting inside of it. I export my .fla as a .swc to use within Flash Builder 4, and create instances of the asset with code, populating the text dynamically from XML. My issue is that even though I have htmlText enabled, bold and italics tags don't appear to be working. I have a feeling it is because when I created the asset in Flash CS4, the text field makes you specify the font, and the subset of that to use (Regular, Bold, Oblique, etc). Is there any way to get the htmlText to render bold and italics tags properly without having to completely rethink the way I'm creating all these fields?

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• error 2016: Condition cannot be specified for Column member

  - by IP

  I am having some issues with Entity Framework in VS2010 The problem I'm getting is described very well here... http://social.msdn.microsoft.com/Forums/en/adonetefx/thread/cacf6a76-09a8-4c90-9502-d8b87c2f6bea It's basically happening when a Foreign key is pointed at the primary key of another table...but if I take off the StoreGeneratedPattern as "Identity", then it tries to insert a value into the identity field ** EDIT So, what it seems to be is that EF4 can't handle a null relationship when the primary key is set to StoreGeneratedPattern="Identity". If I create a FK pointing to this primary key, and make it nullable (effectively creating a 0...M relationship), then it throws this compilation error. Removing StoreGeneratedPattern="Identity" fixes the issue, but causes issues elseware It works if the foreign key is set to not nullable

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• In MVC2, how do I validate fields that aren't in my data model?

  - by Andy Evans

  I am playing with MVC2 in VS 2010 and am really getting to like it. In a sandbox application that I've started from scratch, my database is represented in an ADO.NET entity data model and have done much of the validation for fields in my data model using Scott Guthrie's "buddy class" approach which has worked very well. However, in a user registration form that I have designed and am experimenting with, I'd like to add a 'confirm email address' or a 'confirm password' field. Since these fields obviously wouldn't exist in my data model, how would I validate these fields client side and server side? I would like to implement something like 'Html.ValidationMessageFor', but these fields don't exist in the data model. Any help would be greatly appreciated.

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• Tables with no Primary Key

  - by Matt Hamilton

  I have several tables whose only unique data is a uniqueidentifier (a Guid) column. Because guids are non-sequential (and they're client-side generated so I can't use newsequentialid()), I have made a non-primary, non-clustered index on this ID field rather than giving the tables a clustered primary key. I'm wondering what the performance implications are for this approach. I've seen some people suggest that tables should have an auto-incrementing ("identity") int as a clustered primary key even if it doesn't have any meaning, as it means that the database engine itself can use that value to quickly look up a row instead of having to use a bookmark. My database is merge-replicated across a bunch of servers, so I've shied away from identity int columns as they're a bit hairy to get right in replication. What are your thoughts? Should tables have primary keys? Or is it ok to not have any clustered indexes if there are no sensible columns to index that way?

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• HQL query for entity with max value

  - by Rob

  I have a Hibernate entity that looks like this (accessors ommitted for brevity): @Entity @Table(name="FeatureList_Version") @SecondaryTable(name="FeatureList", pkJoinColumns=@PrimaryKeyJoinColumn(name="FeatureList_Key")) public class FeatureList implements Serializable { @Id @Column(name="FeatureList_Version_Key") private String key; @Column(name="Name",table="FeatureList") private String name; @Column(name="VERSION") private Integer version; } I want to craft an HQL query that retrieves the most up to date version of a FeatureList. The following query sort of works: Select f.name, max(f.version) from FeatureList f group by f.name The trouble is that won't populate the key field, which I need to contain the key of the record with the highest version number for the given FeatureList. If I add f.key in the select it won't work because it's not in the group by or an aggregate and if I put it in the group by the whole thing stops working and it just gives me every version as a separate entity. So, can anybody help?

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• How come the Name property is <Unknown> on a FileStream which uses handle constructors?

  - by Mikael Svenson

  Say you get a file handle from some outside DLL and instantiate a FileStream with it. It works just fine for reading and writing. Then you want the path and name of that handle and try to access the Name property of your FileStream object, and it returns 'unknown'. This is true for the constructors which takes file handles: public FileStream(IntPtr handle, ... public FileStream(SafeFileHandle handle, ... I know the short answer, because it's not implemented. The private field _fileName of FileStream is never assigned in those constructors. Seems the API to get the name from a handle involves more than one line of code, but I still think they could have bothered to include this. So the real questions is: Why haven't they? Or did they just forget?

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