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• All the sudden my links not working in php

  - by francesco

  hi guys, I have a page where all links where working properly but all the sudden some links are not working anymore. I am puzzling myself to undersand why. Nothing really changed. Maybe some css details. Is there anyone who can give a clue? Thank you for any help. me abou twhat might have happened. Francesco PS sorry forgot to say that looking at the source code the links are there and they work. In design view they just do nothing. They look like normal text.

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• abstract class NumberFormat - very confuse about getInstance()

  - by Alex

  Hi, I'm new to Java and I have a beginner question: NumberFormat is an abstract class and so I assume I can't make an instance of it. But there is a public static (factory?) method getInstance() that allow me to do NumberFormat nf = NumberFormat.getInstance(); I'm quite confuse. I'll be glad if someone could give me hints on: 1) If there is a public method to get an instance of this abstract class, why don't we have also a constructor? 2) This is an abstract class ; how can we have this static method giving us an instance of the class? 3) Why choosing such a design? If I assume it's possible to have an instance of an abstract class (???), I don't get why this class should be abstract at all. Thank you.

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• Converting from samplerate/cutoff frequency to pi-radians/sample in a discrete time sampled IIR filter system.

  - by Fake Name

  I am working on doing some digital filter work using Python and Numpy/Scipy. I'm using scipy.signal.iirdesign to generate my filter coefficents, but it requires the filter passband coefficents in a format I am not familiar with wp, ws : float Passband and stopband edge frequencies, normalized from 0 to 1 (1 corresponds to pi radians / sample). For example: Lowpass: wp = 0.2, ws = 0.3 Highpass: wp = 0.3, ws = 0.2 (from here) I'm not familiar with digital filters (I'm coming from a hardware design background). In an analog context, I would determine the desired slope and the 3db down point, and calculate component values from that. In this context, how do I take a known sample rate, a desired corner frequency, and a desired rolloff, and calculate the wp, ws values from that? (This might be more appropriate for math.stackexchange. I'm not sure)

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• Unable to set enviornment variable in platform builder win CE 6.0

  - by mukesh

  Actually while building the win ce project getting the two errors -: Error 1 BUILD: [00:0000000015:ERRORE] C:\WINCE600\PLATFORM\ICOP_Vortex86_60CS\SRC\OAL\OALLIB\obj\x86\debug_objects.mac: create file failed. 2 Error 3 BLDDEMO: There were errors building mytest I think it's comes, due to unset of environmnet variable. facing problem to set environment variable IMGRAM128 in the project proerties, giving the error :- "The variable IMGRAM128 is associated with the 128 RAM catalog item.Would you like to set this variable by adding catalog item in OS design? The varible will not be added to the environmmet tab.............."

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• abstract class NumberFormat - very confused about getInstance()

  - by Alex

  Hi, I'm new to Java and I have a beginner question: NumberFormat is an abstract class and so I assume I can't make an instance of it. But there is a public static (factory?) method getInstance() that allow me to do NumberFormat nf = NumberFormat.getInstance(); I'm quite confuse. I'll be glad if someone could give me hints on: 1) If there is a public method to get an instance of this abstract class, why don't we have also a constructor? 2) This is an abstract class ; how can we have this static method giving us an instance of the class? 3) Why choosing such a design? If I assume it's possible to have an instance of an abstract class (???), I don't get why this class should be abstract at all. Thank you.

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• What makes good software good?

  - by Jonta

  People probably have a lot of different answers here, like good...: scalability, speed, usability, stability, consistency, completeness, absence of bugs, accessibility, documentation, code-quality and so on. There are a lot of philosophies on development of software. Like the UNIX-philosophy. Often vague and not easy to understand. I am looking for statements such as the one cited below. Which you can ask about the software when it's in the design-stage, is ready to be coded, and has been coded and is ready for launch. The software I am talking about, is of course the software made for the end-user. Ken Rockwell wrote: "I expect that it will let me get more accomplished in less time." (Here one could ask "will this let me get more accomplished in less time?")

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• Should I use php mail function or phpmailer?

  - by bbtang

  Well, so far, I have been using php built in function, mail(), and I have no problems with it, even I sent a blast to 1000+ users. But then, lately I found this phpmailer, which is specially design to send email. Q1: Should I change to this phpmailer? Q2: What are the advantages of using phpmailer? Q3: I found other products on phpmailer website, i.e phpmailer FE, ML etc. What are those? Which one you guys is using? Q4: Have anyone tried sending blast email to 2000+ users with phpmailer? If yes, does it cause any problems? Thanks in advanced for answering the questions

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• VS2008 asp.net spits out gibberish, possibly wrong encoding issue.

  - by Edward M Meshuris

  Hello, I have inherited a project, it was originally written in VS2005. I have made a few changes, but all are design. Now when I run the project using the visual studio's web server, in IE8, the page shows up just fine, however in FireFox 3.6.3, I get gibberish (a full page of this): ?I?%&/m?{J?J??t??$?@?????iG#)?*??eVe]f@?? ??{???{??;?N'????\fdl??J??!????~|?"~???????7????t?.???WO???? m???{'w?}?4??????x'}??W?{???G?G?]=?{???j|uo\?w???Pv??? My setup: Windows 7 Proffesional (All patches) VS2008 SP1 (I think all patches) Thank you for your help! -Edward

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• Ordered many-to-many relationship in NHibernate

  - by Kristoffer

  Let's say I have two classes: Item and ItemCollection, where ItemCollection contains an ordered list of Item objects with an index, i.e. the list is ordered in a way specified by the user. Let's also say that they have a many-to-many relationship, an ItemCollection can contain many items and an Item can belong to several ItemCollections. That would, in my head, require three tables in the database. One for Item, one for ItemCollection and one for the ordered mapping. The mapping table would contain three columns: int ItemID int ItemCollectionID int ListIndex QUESTION: How would you design the ItemCollection class? Should the list of Item objects be a list, dictionary or other? What would the NHibernate mapping look like to get the ListIndex into the picture?

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• What kind of knowledge do you need to invent a new programming language?

  - by systempuntoout

  I just finished to read "Coders at works", a brilliant book by Peter Seibel with 15 interviews to some of the most interesting computer programmers alive today. Well, many of the interviewees have (co)invented\implemented a new programming language. Some examples: Joe Armstrong: Inventor of Erlang L. Peter Deutsch: implementer of Smalltalk-80 Brendan Eich: Inventor of JavaScript Dan Ingalls: Smalltalk implementor and designer Simon Peyton Jones: Coinventor of Haskell Guy Steele: Coinventor of Scheme Is out of any doubt that their minds have something special and unreachable, and i'm not crazy to think i will ever able to create a new language; i'm just interested in this topic. So, imagine a funny\grotesque scenario where your crazy boss one day will come to your desk to say "i want a new programming language with my name on it..take the time you need and do it", which is the right approach to studying this fascinating\intimidating\magic topic? What kind of knowledge do you need to model, design and implement a brand new programming language?

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• Preventing mouse emulation events (ie click) from touch events in Mobile Safari / iPhone using Javas

  - by Jaime Cham

  In doing a single page Javascript app with interactive DOM elements I've found that the "mouseover-mousemove-mousedown-mouseup-click" sequence happens all in a bunch after the "touchstart-touchmove-touchend" sequence of events. I've also found that it is possible to prevent the "mouse*-click" events from happening by doing an "event.preventDefault()" during the touchstart event, but only then, and not during the touchmove and touchend. This is a strange design, because because it is not possible to know during the touchstart yet whether the user intents to drag or swipe or just tap/click on the item. I ended up setting up a "ignore_next_click" flag somewhere tied to a timestamp, but this is obviously not very clean. Does anybody know of a better way of doing this, or are we missing something? Note that while a "click" can be recognized as a "touchstart-touchend" sequence (ie no "touchmove"), there are certain things, such as keyboard input focus, that can only happen during a proper click event.

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• Most wanted feature for C# 4.0 ?

  - by Romain Verdier

  Some blogs on the Internet give us several clues of what C# 4.0 would be made of. I would like to know what do you really want to see in C# 4.0. Here are some related articles: C# 4 tag on Jon Skeet's blog 4 features for C# 4 What do you want in C# 4 Future Focus - I: Dynamic Lookup .NET 4, C# 4 and the DLR Channel 9 also hosts a very interesting video where Anders Hejlsberg and the C# 4.0 design team talk about the upcoming version of the language. I'm particularly excited about dynamic lookup and AST. I hope we would be able to leverage - at some level - the underlying DLR mechanisms from C#-the-static-language. What about you ?

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• How to stop worker threads in a multithreaded Windows service on service stop

  - by RobW

  I have a Windows service that uses the producer/consumer queue model with multiple worker threads processing tasks off a queue. These tasks can be very long running, in the order of many minutes if not hours, and do not involve loops. My question is about the best way to handle the service stop to gracefully end processing on these worker threads. I have read in another SO question that using thread.Abort() is a sign of bad design, but it seems that the service OnStop() method is only given a limited amount of time to finish before the service is terminated. I can do sufficient clean-up in the catch for ThreadAbortException (there is no danger of inconsistent state) so calling thread.Abort() on the worker threads seems OK to me. Is it? What are the alternatives?

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• What kind of knowledge you need to invent a new programming language?

  - by systempuntoout

  I just finished to read "coders at works", a brilliant book by Peter Seibel with 15 interviews to some of the most interesting computer programmers alive today. Well, many of the interviewees have (co)invented\implemented a new programming language. For example: * Joe Armstrong: Inventor of Erlang * L. Peter Deutsch: implementer of Smalltalk-80 * Brendan Eich: Inventor of JavaScript * Dan Ingalls: Smalltalk implementor and designer * Simon Peyton Jones: Coinventor of Haskell * Guy Steele: Coinventor of Scheme Is out of any doubt that their minds have something special and unreachable, and i'm not crazy to think i will ever able to create a new language; i'm just interested in this topic. So, imagine a funny\grotesque scenario where your crazy boss one day will come to your desk to say "i want a new programming language with my name on it..take the time you need and do it", what will you start to study? What kind of knowledge do you need to model, design and implement a brand new programming language?

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• What are some interesting fringe programming topics that might have hands-on training?

  - by hal10001

  Whenever training topic questions are asked, the answers are fairly typical, and involve a pretty limited subset of topics like OO, design patterns, algorithms, web services, SQL, etc., but I wonder if there are some fringe topics that are still applicable to the programming field and would give me a more rounded approach to development. When I think of "fringe", I think of 2600: The Hacker Quarterly articles that discuss how to use real world (sometimes obscure) exploits, or something like Maker Faire that demonstrates embedded systems programming using Arduino. I have around $1500-2000 to spend, and my job entails Java technologies, but that does not limit my options.

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• Base class for windows service

  - by user187020

  My new project has a design in which there are number windows services for performing different tasks. I have been given a task to create base class from which all of the windows service will inherit. This base class will perform common functions like creating instances of other windows services by iterating through the config file (may be like Activator.CreateInstance), do event logging on onStart, onStop etc. and may contain some more functionality. Before I start developing stuff, wondering if there is any pattern already in place or someone has good understanding of how to implement this kind of functionality. Any help appreciated.

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• Best practices book for CRUD apps

  - by Kevin L.

  We will soon be designing a new tool to calculate commissions across multiple business units. This new compensation scheme is pretty clever and well thought-out, but the complexity that the implementation will involve will make the Hubble look like a toaster. A significant portion of the programming industry involves CRUD apps; updating insurance data, calculating commissions (Joel included) ...even storing questions and answers for a programmer Q&A site. We as programmers have Code Complete for the low-level formatting/style and Design Patterns for high-level architecture (to name just a few). Where’s the comparable book that teaches best practices for CRUD?

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• drupal what if we have designed a content type with existing fields

  - by rakeshakurathi

  i have small problem.... i have one content type say cars with various fields, say more than 30 , user can create the content types... now i would like to show only few fields in different phases,is there any possibility to do that. more explantaion:- user may enter the car model and car details in the first page and upload images in second page.(say a popup in the block) is this is possible ? i m newbie to drupal, i would like to do this kind of data updation, i though with designing a one more content type with the existing fields, can any one explain this issue... what if i design a content type car1 with same fields say(file uplaod) in car content type.

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• Any serious problems when making an old java web app run on new IE 8 browser?

  - by pinichi

  I need make an quick estimation on project (not sure we got): It's an old banking CMS java web app: Server: jdk5, weblogic 9. Client: winXP, Ie6. It was design only for use with ie6 but now we need make it also run well on new client: ie8,ie7 on win7. I understand the most difference is the client: DOM and CSS. But my problem is we hasn't been worked with ie8, and I have not enough time to build an testing environment because our developing environment is not ready to make test (its remoting completely, and managed by another partner) Any experience or suggestion to help me weighing this task need will be welcomed.

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• Relationship between .NET ClassLoader and Assembly

  - by smwikipedia

  I am wondering about the relationship between .NET ClassLoader and Assembly I use the "!dumpdomain xxxx" command and got the following output: Domain 1: 00522108 LowFrequencyHeap: 0052212c HighFrequencyHeap: 00522178 StubHeap: 005221c4 Stage: OPEN SecurityDescriptor: 00523430 Name: BoxUnbox.exe **Assembly**: 0056eb88 [C:\Windows\assembly\GAC_32\mscorlib\2.0.0.0__b77a5c561934e089\mscorlib.dll] **ClassLoader**: 0056ec08 SecurityDescriptor: 0056c078 Module Name 56d71000 C:\Windows\assembly\GAC_32\mscorlib\2.0.0.0__b77a5c561934e089\mscorlib.dll **Assembly**: 005794f0 [] **ClassLoader**: 00579570 SecurityDescriptor: 0057a018 Module Name 00152c5c I noticed that the "ClassLoader" and "Assembly" appear in pair. It seems each Assembly is accompanied with its own "ClassLoader". Why like this? Is this a litte noisy? Why not just assign one "ClassLoader" to a AppDomain and use it to load all the used Assembly into the AppDomain? Isnt't this design more elegant? Many thanks.

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• How to make a TableLayout from XML using programmable way ?

  - by user164589

  hi guys, I am trying to add TableLayout to the LinearLayout from resourse(xml) using programmable way. The added TableLayout count is dynamic. It would be between 1 - 10. I think it is better way to make it from resource xml. Because design doesn't break. How to make it ? Actually I don't know how to create a new instance from the XML. Please help. guys. Thanks in advance.

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• Visual Studio 2005 "Add Web Deployment Project..." not showing up for web application projects.

  - by Joe Sands

  I downloaded the Web Deployment Project plug-in for Visual Studio 2005. I installed it. I have a project that I am working on that is a Web Application Project. The Add Web Deployment Project Build menu selection is not in the Build Menu or Solution Explorer. If I create a raw test Web Site Project, the menu item magically appears. Is this by design or am I missing something. Also, I am completely up to date on all the VS 2005 updates.

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• MVC - Calling Controller Methods

  - by JT703

  Hello, My application is following the MVC design pattern. The problem I keep running into is needing to call methods inside a Controller class from outside that Controller class (ex. A View class wants to call a Controller method, or a Manager class wants to call a Controller method). Is calling Controller methods in this way allowed in MVC? If it's allowed, what's the proper way to do it? According to the version of MVC that I am following (there seems to be so many different versions out there), the View knows of the Model, and the Controller knows of the View. Doing it this way, I can't access the controller. Here's the best site I've found and the one describing the version of MVC I'm following: http://leepoint.net/notes-java/GUI/structure/40mvc.html. The Main Program code block really shows how this works. Thanks for any answers.

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• Recommendations for 'C' Project architecture guidlines?

  - by SiegeX

  Now that I got my head wrapped around the 'C' language to a point where I feel proficient enough to write clean code, I'd like to focus my attention on project architecture guidelines. I'm looking for a good resource that coves the following topics: How to create an interface that promotes code maintainability and is extensible for future upgrades. Library creation guidelines. Example, when should I consider using static vs dynamic libraries. How to properly design an ABI to cope with either one. Header files: what to partition out and when. Examples on when to use 1:1 vs 1:many .h to .c Anything you feel I missed but is important when attempting to architect a new C project. Ideally, I'd like to see some example projects ranging from small to large and see how the architecture changes depending on project size, function or customer. What resource(s) would you recommend for such topics? Thanks

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• Looking for a reporting tool that will allow vector graphics in output file (PDF)

  - by Richard West

  I have been tasked with evaluating our current system that we use for creating and outputing reports. Currently we are using Crystal Reports ver 8, (I know that this is and old version.), which has a custom commandline app that we wrote in C# to execute the report for a given parameter passed through the command line. We like Crystal becuase it's easy to setup and design the report. It's also easy to print and create a PDF file from crystal using our custom commandline program. One of the problems/complaints that we have is that Crystal does does not appear to have a method that will allow us to create a PDF file with a vector images, such as our company logo. Crystal Reports always converts an image into a bitmap. When the PDF is printed, the results are less than flattering, and the PDF file size is increased. Does anyone have any recomendadtions for a reporting product that we should consider?

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