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  • Is catching general exceptions really a bad thing?

    - by Bob Horn
    I typically agree with most code analysis warnings, and I try to adhere to them. However, I'm having a harder time with this one: CA1031: Do not catch general exception types I understand the rationale for this rule. But, in practice, if I want to take the same action regardless of the exception thrown, why would I handle each one specifically? Furthermore, if I handle specific exceptions, what if the code I'm calling changes to throw a new exception in the future? Now I have to change my code to handle that new exception. Whereas if I simply caught Exception my code doesn't have to change. For example, if Foo calls Bar, and Foo needs to stop processing regardless of the type of exception thrown by Bar, is there any advantage in being specific about the type of exception I'm catching?

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  • Reuseable Platform For Custom Board Game

    - by George Bailey
    Is there a generic platform to allow me to customize the rules to a board game. The board game uses a square grid, similar to Checkers or Chess. I was hoping to take some of the work out of creating this computer opponent, by reusing what is already written. I would think that there would be a pre-written routine for deciding which moves would lead to the best outcome, and all that I would need to program is the pieces, legal moves, what layout constitutes a win/lose or draw, and perhaps some kind of scoring for value of pieces. I have seen chess programs that appear to use a recursive routine, so they think anywhere from 2 to 20 moves ahead to create varying degrees of difficulty. I have noticed this on chess.com. The game I am programming will not be as complex. Is there a platform designed to be re-used for different grid/piece based games. JavaScript would be preferable, but Java or Perl would be acceptable.

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  • JQGrid and JQuery Autocomplete

    - by Neff
    When implementing JQGrid 4.3.0, Jquery 1.6.2, and JQuery UI 1.8.16 Ive come across an issue with the Inline edit. When the inline edit is activated, some of the elements get assigned an auto complete. When the inline edit is canceld or saved, the auto complete does not always go away (selecting text by double clicking it then hitting delete, then hitting escape to exit row edit). Leaving the auto complete controls in edit mode when the row is no longer considered in edit mode. Perhaps you can tell me if there is a problem with the initialization or if I you are aware of an event post-"afterrestorefunc" that the fields can be returned to their "original" state. Original state being displayed as data in the JQGrid row. I've tried removing the DOM after row close, .remove() and .empty(): ... "afterrestorefunc": function(){ $('.ui-autocomplete-input').remove(); } ... but that causes other issues, such as the jqgrid is not able to find the cell when serializing the row for data or edit, and requires a refresh of the page, not just jqgrid, to be able to once again see the data from that row. Auto complete functionality for the element is created on the double click of the row: function CreateCustomSearchElement(value, options, selectiontype) { ... var el; el = document.createElement("input"); ... $(el).autocomplete({ source: function (request, response) { $.ajax({ url: '<%=ResolveUrl("~/Services/AutoCompleteService.asmx/GetAutoCompleteResponse") %>', data: "{ 'prefixText': '" + request.term + "', 'contextKey': '" + options.name + "'}", dataType: "json", type: "POST", contentType: "application/json; charset=utf-8", success: function (data) { response($.map(data.d, function (item) { return { label: Trim(item), value: Trim(item), searchVal: Trim(item) } })) } }); }, select: function (e, item) { //Select is on the event of selection where the value and label have already been determined. }, minLength: 1, change: function (event, ui) { //if the active element was not the search button //... } }).keyup(function (e) { if (e.keyCode == 8 || e.keyCode == 46) { //If the user hits backspace or delete, check the value of the textbox before setting the searchValue //... } }).keydown(function (e) { //if keycode is enter key and there is a value, you need to validate the data through select or change(onblur) if (e.keyCode == '13' && ($(el).val())) { return false; } if (e.keyCode == '220') { return false } }); } Other Sources: http://www.trirand.com/jqgridwiki/doku.php?id=wiki:inline_editing http://api.jqueryui.com/autocomplete/ Update: I tried only creating the autocomplete when the element was focused, and removing it when onblur. That did not resolve the issue either. It seems to just need the autocomplete dropdown to be triggered.

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  • Solid principles vs YAGNI

    - by KeesDijk
    When do the SOLID principles become YAGNI. As programmers we make trade-off's all the time, between complexity, maintainabillity, time to build and so forth.Amongst others. two of the smartest guidelines for making choices are in my mind the SOLID principles and YAGNI. If you don't need it, dont build it and keep it clean. Now for example when i watch the dimecast series on SOLID I see it start out as a fairly simple programm and ending up prettty complex (end yes complexity is also in the eye of the beholder) but it still makes me wonder, when do SOLID principles turn into something you don't need. All solid principles are ways of working that enable use te make changes at a later stage. But what if the problem to solve is a pretty simple one and it's a through away application, than what ? Or are the SOLID principles something that apply always ?

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  • java.lang.ClassCastException: java.lang.Integer cannot be cast

    - by theJava
    When i click on login, it checks the DB if there is a value matching then i get this error, else it does print me null. public Login authenticate(Login login) { String query = "SELECT 1 FROM Login AS l WHERE l.email=? AND l.password=?"; Object[] parameters = { login.getEmail(), login.getPassword() }; List resultsList = getHibernateTemplate().find(query,parameters); if (resultsList.isEmpty()) { } else if (resultsList.size() > 1) { } else { Login login1 = (Login) resultsList.get(0); System.out.println("Hello" + login1); return login1; } return null; } Error below Cause: java.lang.ClassCastException: java.lang.Integer cannot be cast to com.intermedix.domain.Login at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:507) at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:161) at com.vaadin.ui.AbstractComponent.fireEvent(AbstractComponent.java:1154) at com.vaadin.ui.Button.fireClick(Button.java:371) at com.vaadin.ui.Button.changeVariables(Button.java:193) at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.handleVariables(AbstractCommunicationManager.java:1094) at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.doHandleUidlRequest(AbstractCommunicationManager.java:590) at com.vaadin.terminal.gwt.server.CommunicationManager.handleUidlRequest(CommunicationManager.java:266) at com.vaadin.terminal.gwt.server.AbstractApplicationServlet.service(AbstractApplicationServlet.java:476) at javax.servlet.http.HttpServlet.service(HttpServlet.java:820) at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511) at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:390) at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182) at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765) at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418) at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230) at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) at org.mortbay.jetty.Server.handle(Server.java:326) at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542) at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:943) at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:756) at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:218) at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:410) at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582) Caused by: java.lang.ClassCastException: java.lang.Integer cannot be cast to com.intermedix.domain.Login at com.intermedix.services.LoginService.authenticate(LoginService.java:34) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:301) at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:182) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149) at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:106) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171) at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204) at $Proxy32.authenticate(Unknown Source) at com.intermedix.ui.LoginDailog.checkLogin(LoginDailog.java:106) at com.intermedix.ui.LoginDailog.access$0(LoginDailog.java:102) at com.intermedix.ui.LoginDailog$1.buttonClick(LoginDailog.java:52) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:487) ... 26 more

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  • Why are events and commands in MVVM so unsupported by WPF / Visual Studio?

    - by Edward Tanguay
    When creating an WPF application with the MVVM pattern, it seems I have to gather the necessary tools myself to even begin the most rudimentary event handling, e.g. AttachedBehaviors I get from here DelegateCommands I get from here Now I'm looking for some way to handle the ItemSelected event in a ComboBox and am getting suggestions of tricks and workarounds to do this (using a XAML trigger or have other elements bound to the selected item, etc.). Ok, I can go down this road, but it seems to be reinventing the wheel. It would be nice to just have an ItemSelected command that I can handle in my ViewModel. Am I missing some set of standard tools or is everyone doing MVVM with WPF basically building and putting together their own collection of tools just so they can do the simplest plumbing tasks with events and commands, things that take only a couple lines in code-behind with a Click="eventHandler"?

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  • Client Side Form Validation vs. Server Side Form Validation

    In my opinion, it is mandatory to validate data using client side and server side validation as a fail over process. The client side validation allows users to correct any error before they are sent to the web server for processing, and this allows for an immediate response back to the user regarding data that is not correct or in the proper format that is desired. In addition, this prevents unnecessary interaction between the user and the web server and will free up the server over time compared to doing only server side validation. Server validation is the last line of defense when it comes to validation because you can check to ensure the user’s data is correct before it is used in a business process or stored to a database. Honestly, I cannot foresee a scenario where I would only want to use one form of validation over another especially with the current cost of creating and maintaining data. In my opinion, the redundant validation is well worth the overhead.

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  • Does somebody know of a testcase(s) of libRocket

    - by Bjorn
    Today I implemented the interfaces for libRocket in my engine using opengl 3.3. I got a standard rml file and some fonts and images which where needed in this rml file. It seems that the page/rml I'm rendering know is the correct one, but I'm not 100% sure. Also because I still don't know a lot of rml and it is a fairly complex one. So my question: Are there any testcases for example an rml with images and fonts with the result as it should be rendered in a png or some other image format? If there aren't would somebody who actually implemented the libRocket interface correctly be so kind and share a result of a rendering in a png with the rml tobe rendered?

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  • Powder games: how do they work?

    - by Marc Müller
    Hey guys, I recently found these two gems: http://powdertoy.co.uk/ http://dan-ball.jp/en/javagame/dust/ My question is: How are the physics with so many elements efficiently handled? Am I just severely underestimating modern computing power or is it possible to 'just' have a two-dimensional array, each cell of which describes what is placed at the according position and simulate each cell in every step. Or are there more complex things being done like summarising large areas of the same kind into a single data set and separating said set as needed? Are there any open-source games like this I could look at?

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  • Trouble cross-referencing two XML child nodes in AS3

    - by Dwayne
    I am building a mini language translator out of XML nodes and Actionscript 3. I have my XML ready. It contains a series of nodes with two children in them. Here is a sample: <translations> <entry> <english>man</english> <cockney>geeza</cockney> </entry> <entry> <english>woman</english> <cockney>lily</cockney> </entry> </translations> The AS3 part consist of one input box named "textfield_txt" where the English word will be typed in. An output text field for the translation called "cockney_txt". Finally, one button to execute the translation called "generate_mc". The idea is to have actionscript look through the XML for key English words after the user types it in the "textfield", cross-freferences the children then returns the Cockney translation as a value. The trouble is, when I test it I get no response or error messages- it's completely silent. I'm not sure what I'm doing wrong. At present, I have setup a conditional statement to tell me whether the function works or not. The result is, no it's not! Here's the code below. I hope someone can help. Cheers! generate_mc.buttonMode=true; var English:String; var myXML:XML; var myLoader:URLLoader = new URLLoader(); myLoader.load(new URLRequest("Language.xml")); myLoader.addEventListener(Event.COMPLETE, processXML); function processXML(e:Event):void { myXML = new XML(e.target.data); } generate_mc.addEventListener(MouseEvent.CLICK, onClick); function onClick(event:MouseEvent) { English = textfield.text; cockney_txt.text = myXML.translations.entry.cockney; if(textfield.text.toLowerCase() == myXML.translations.entry.english.toLowerCase){ //return myXML.translations.entry.cockney; trace("success"); }else{ trace("try again!"); // ***I get this as a result } }

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  • How do I improve my code reading skills

    - by Andrew
    Well the question is in the title - how do I improve my code reading skills. The software/hardware environment I currently do development in is quite slow with respect to compilation times and time it takes the whole system to test. The system is quite old/complex and thus splitting it into a several smaller, more manageable sub-projects is not feasible in a neare future. I have realized is what really hinders the development progress is my code reading skills. How do I improve my code reading skills, so I can spot most of the errors and issues in the code even before I hit the "do compile" key, even before I start the debugger?

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  • Is it possible to get an NSView to pass rightMouseDown: to the next responder without subclassing?

    - by Benedict Cohen
    I have a view which contains a few subviews: mainView subViewA subViewB SubViewC mainView is an NSView constructed from a nib and is controlled with an NSViewController subclass. The subviews are standard views such as NSTextField and NSImageView and are configured to be non-editable. I want mainView to receive rightMouseDown: even when the event is triggered in one of the subviews. The default implementation of rightMouseDown: in NSResponder passes the event to the next responder, but NSView changes the default behaviour and does not pass it to the next responder. I could subclass all of the subviews but this doesn't seem like a very elegant or maintainable solution. How can I get the subviews to pass rightMouseDown: messages to the next responder without subclassing all of the subviews?

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  • What Are Some Advantages/Disadvantages of Using C over Assembly?

    - by Daniel
    I'm currently studying engineering in Telecommunications and Electronics and we have migrated from assembler to C in microprocessor programming. I have doubts that this is a good idea. What are some advantages and disadvantages of C compared to assembly? The advantages/disadvantages I see are: Advantages: I can tell that C syntax is a lot easier to learn than Assembler syntax. C is easier to use for making more complex programs. Learning C is somehow more productive than learning assembler cause there is more developing stuff around C than Assembler. Disadvantages: Assembler is a lower level programming language than C,so this makes it a good for programming directly to hardware. Is a lot more flexible alluding you to work with memory,interrupts,micro-registers,etc.

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  • How do game programmers design their classes to reuse in AI, network and play and pass mode?

    - by Amogh Talpallikar
    For a two player game where, your opponent could be on the network, CPU itself or near you where you would play turn by turn on the same machine. How do people design classes for re-use ? I am in a similar situation and have no experience in making such complex games. But here is what I have thought, If I am a player object , I should only be interacting with the GameManager or GameEngine Singleton , from which I will get various notifications about the game status. I dont care where and who my opponent is, this GameManager depending upon the game mode, will interact with gameNetworkManager , or AI tell me what the opponent played. I am not sure about the scenario where we play and pass [turn by turn on same machine]. Hoping for a brief but clear explanation or at least a link to a similar resource.:)

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  • How to time-delay email deliveries?

    - by Michael D
    I'm currently learning about the Drupal email functions, such as drupal_mail and hook_mail, and hook_mail_alter, and I have a problem before me where I'll need to be able to queue emails for delayed delivery. For example, an event signup notification that needs to wait for an hour after the event was registered by a user. And that email has user specific data, so can't be just a generic template email... I'm using the MailQ module, mainly for it's logging capabilities, but I wonder if it (or something else) could be modified to add a configurable delay function? Any ideas?

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  • When Programming will become deprecated [closed]

    - by Vibeeshan
    Possible Duplicate: Will programmers be around in a few years? According to the history of programming, with each new generation of software engineering it seems to become easier and easier. Machine Code - Assembly - Programming Languages - easier - more easier - etc. If this situation continues anyone will be able to program (even complex systems). Even now, most of the kids study programming at school (Pascal , VB, etc.). Will be there any jobs called software engineering in future (if everyone know to program). ....and.... What do you think about the future of software development?

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  • jQuery UI dialog + Ajax fails with IE 6-7-8

    - by user252849
    hey i have problem with jQuery-ui Dialog when using ajax $.ajax({ url: "folders.php", cache: false, data: { 'do' : 'Ajax' ,'_a' : 'ChangeMoviesFolder' ,'MovieIDS' : MovieIDS ,'toFolderID' : toFolderID ,'fromFolderID' : fromFolderID }, context: document.body, open: function(event, ui) { alert('open'); }, error : function(XMLHttpRequest, textStatus, errorThrown){ // Handle the beforeSend event // alert("responseText: "+errorThrown.message); }, success: function(data){ $('input.checkMovie').attr('checked',0); $("#resultsTable").find('tr.selectable-row').removeClass('active'); if (data == '1') { window.location = WWW_ROOT+'movies.php?do=List&FolderID='+toFolderID; } $dialog.dialog("close"); }}); when using IE ajax never get to success option in error i got "This method cannot be called until the open method has been called" Its happen only in IE. Does any one may know what the problem might be ? (all vars are ok and works perfectly in FF & chrome) thanks.

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  • Code Monster Helps Introduce Kids (and Curious Adults) to the Basics of Programming

    - by Jason Fitzpatrick
    If you’re looking for a fun way to introduce a kid to programming (or sate your own curiosity), Crunchzilla’s Code Monster is a real-time introduction to basic programming concepts. How does Code Monster work? Users are guided through the programming experience (using JavaScript) by a talkative blue monster that asks questions about the code and suggests courses of action. Play long enough and you travel from simple variables to more complex ideas like conditionals, expressions, and more. It’s not a comprehensive programming curriculum (nor does it claim to be) but it’s a great way to introduce people of all ages to programming. Hit up the link below to take it for a spin. Code Monster [via O'Reilly Radar] 8 Deadly Commands You Should Never Run on Linux 14 Special Google Searches That Show Instant Answers How To Create a Customized Windows 7 Installation Disc With Integrated Updates

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  • Availability Best Practices on Oracle VM Server for SPARC

    - by jsavit
    This is the first of a series of blog posts on configuring Oracle VM Server for SPARC (also called Logical Domains) for availability. This series will show how to how to plan for availability, improve serviceability, avoid single points of failure, and provide resiliency against hardware and software failures. Availability is a broad topic that has filled entire books, so these posts will focus on aspects specifically related to Oracle VM Server for SPARC. The goal is to improve Reliability, Availability and Serviceability (RAS): An article defining RAS can be found here. Oracle VM Server for SPARC Principles for Availability Let's state some guiding principles for availability that apply to Oracle VM Server for SPARC: Avoid Single Points Of Failure (SPOFs). Systems should be configured so a component failure does not result in a loss of application service. The general method to avoid SPOFs is to provide redundancy so service can continue without interruption if a component fails. For a critical application there may be multiple levels of redundancy so multiple failures can be tolerated. Oracle VM Server for SPARC makes it possible to configure systems that avoid SPOFs. Configure for availability at a level of resource and effort consistent with business needs. Effort and resource should be consistent with business requirements. Production has different availability requirements than test/development, so it's worth expending resources to provide higher availability. Even within the category of production there may be different levels of criticality, outage tolerances, recovery and repair time requirements. Keep in mind that a simple design may be more understandable and effective than a complex design that attempts to "do everything". Design for availability at the appropriate tier or level of the platform stack. Availability can be provided in the application, in the database, or in the virtualization, hardware and network layers they depend on - or using a combination of all of them. It may not be necessary to engineer resilient virtualization for stateless web applications applications where availability is provided by a network load balancer, or for enterprise applications like Oracle Real Application Clusters (RAC) and WebLogic that provide their own resiliency. It's (often) the same architecture whether virtual or not: For example, providing resiliency against a lost device path or failing disk media is done for the same reasons and may use the same design whether in a domain or not. It's (often) the same technique whether using domains or not: Many configuration steps are the same. For example, configuring IPMP or creating a redundant ZFS pool is pretty much the same within the guest whether you're in a guest domain or not. There are configuration steps and choices for provisioning the guest with the virtual network and disk devices, which we will discuss. Sometimes it is different using domains: There are new resources to configure. Most notable is the use of alternate service domains, which provides resiliency in case of a domain failure, and also permits improved serviceability via "rolling upgrades". This is an important differentiator between Oracle VM Server for SPARC and traditional virtual machine environments where all virtual I/O is provided by a monolithic infrastructure that itself is a SPOF. Alternate service domains are widely used to provide resiliency in production logical domains environments. Some things are done via logical domains commands, and some are done in the guest: For example, with Oracle VM Server for SPARC we provide multiple network connections to the guest, and then configure network resiliency in the guest via IP Multi Pathing (IPMP) - essentially the same as for non-virtual systems. On the other hand, we configure virtual disk availability in the virtualization layer, and the guest sees an already-resilient disk without being aware of the details. These blogs will discuss configuration details like this. Live migration is not "high availability" in the sense of "continuous availability": If the server is down, then you don't live migrate from it! (A cluster or VM restart elsewhere would be used). However, live migration can be part of the RAS (Reliability, Availability, Serviceability) picture by improving Serviceability - you can move running domains off of a box before planned service or maintenance. The blog Best Practices - Live Migration on Oracle VM Server for SPARC discusses this. Topics Here are some of the topics that will be covered: Network availability using IP Multipathing and aggregates Disk path availability using virtual disks defined with multipath groups ("mpgroup") Disk media resiliency configuring for redundant disks that can tolerate media loss Multiple service domains - this is probably the most significant item and the one most specific to Oracle VM Server for SPARC. It is very widely deployed in production environments as the means to provide network and disk availability, but it can be confusing. Subsequent articles will describe why and how to configure multiple service domains. Note, for the sake of precision: an I/O domain is any domain that has a physical I/O resource (such as a PCIe bus root complex). A service domain is a domain providing virtual device services to other domains; it is almost always an I/O domain too (so it can have something to serve). Resources Here are some important links; we'll be drawing on their content in the next several articles: Oracle VM Server for SPARC Documentation Maximizing Application Reliability and Availability with SPARC T5 Servers whitepaper by Gary Combs Maximizing Application Reliability and Availability with the SPARC M5-32 Server whitepaper by Gary Combs Summary Oracle VM Server for SPARC offers features that can be used to provide highly-available environments. This and the following blog entries will describe how to plan and deploy them.

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  • How to Setup Network Link aggregation (802.3ad) on Ubuntu

    - by Sysadmin Geek
    Do you need to pump large amounts of data to a multitude of clients simultaneously, while only using a single IP address? By using “link aggregation” we can join several separate network cards on the system into one humongous NIC. Latest Features How-To Geek ETC Learn To Adjust Contrast Like a Pro in Photoshop, GIMP, and Paint.NET Have You Ever Wondered How Your Operating System Got Its Name? Should You Delete Windows 7 Service Pack Backup Files to Save Space? What Can Super Mario Teach Us About Graphics Technology? Windows 7 Service Pack 1 is Released: But Should You Install It? How To Make Hundreds of Complex Photo Edits in Seconds With Photoshop Actions Super-Charge GIMP’s Image Editing Capabilities with G’MIC [Cross-Platform] Access and Manage Your Ubuntu One Account in Chrome and Iron Mouse Over YouTube Previews YouTube Videos in Chrome Watch a Machine Get Upgraded from MS-DOS to Windows 7 [Video] Bring the Whole Ubuntu Gang Home to Your Desktop with this Mascots Wallpaper Hack Apart a Highlighter to Create UV-Reactive Flowers [Science]

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  • Problem with Variable Scoping in Rebol's Object

    - by Rebol Tutorial
    I have modified the rebodex app so that it can be called from rebol's console any time by typing rebodex. To show the title of the app, I need to store it in app-title: system/script/header/title so tha it could be used later in view/new/title dex reform [self/app-title version] That works but as you can see I have named the var name "app-title", but if I use "title" instead, the window caption would show weird stuff (vid code). Why ? REBOL [ Title: "Rebodex" Date: 23-May-2010 Version: 2.1.1 File: %rebodex.r Author: "Carl Sassenrath" Modification: "Rebtut" Purpose: "A simple but useful address book contact database." Email: %carl--rebol--com library: [ level: 'intermediate platform: none type: 'tool domain: [file-handling DB GUI] tested-under: none support: none license: none see-also: none ] ] rebodex.context: context [ app-title: system/script/header/title version: system/script/header/version set 'rebodex func[][ names-path: %names.r ;data file name-list: none fields: [name company title work cell home car fax web email smail notes updat] names: either exists? names-path [load names-path][ [[name "Carl Sassenrath" title "Founder" company "REBOL Technologies" email "%carl--rebol--com" web "http://www.rebol.com"]] ] brws: [ if not empty? web/text [ if not find web/text "http://" [insert web/text "http://"] error? try [browse web/text] ] ] dial: [request [rejoin ["Dial number for " name/text "? (Not implemented.)"] "Dial" "Cancel"]] dex-styles: stylize [ lab: label 60x20 right bold middle font-size 11 btn: button 64x20 font-size 11 edge [size: 1x1] fld: field 200x20 font-size 11 middle edge [size: 1x1] inf: info font-size 11 middle edge [size: 1x1] ari: field wrap font-size 11 edge [size: 1x1] with [flags: [field tabbed]] ] dex-pane1: layout/offset [ origin 0 space 2x0 across styles dex-styles lab "Name" name: fld bold return lab "Title" title: fld return lab "Company" company: fld return lab "Email" email: fld return lab "Web" brws web: fld return lab "Address" smail: ari 200x72 return lab "Updated" updat: inf 200x20 return ] 0x0 updat/flags: none dex-pane2: layout/offset [ origin 0 space 2x0 across styles dex-styles lab "Work #" dial work: fld 140 return lab "Home #" dial home: fld 140 return lab "Cell #" dial cell: fld 140 return lab "Alt #" dial car: fld 140 return lab "Fax #" fax: fld 140 return lab "Notes" notes: ari 140x72 return pad 136x1 btn "Close" #"^q" [store-entry save-file unview] ] 0x0 dex: layout [ origin 8x8 space 0x1 styles dex-styles srch: fld 196x20 bold across rslt: list 180x150 [ nt: txt 178x15 middle font-size 11 [ store-entry curr: cnt find-name nt/text update-entry unfocus show dex ] ] supply [ cnt: count + scroll-off face/text: "" face/color: snow if not n: pick name-list cnt [exit] face/text: select n 'name face/font/color: black if curr = cnt [face/color: system/view/vid/vid-colors/field-select] ] sl: slider 16x150 [scroll-list] return return btn "New" #"^n" [new-name] btn "Del" #"^d" [delete-name unfocus update-entry search-all show dex] btn "Sort" [sort names sort name-list show rslt] return at srch/offset + (srch/size * 1x0) bx1: box dex-pane1/size bx2: box dex-pane2/size return ] bx1/pane: dex-pane1/pane bx2/pane: dex-pane2/pane rslt/data: [] this-name: first names name-list: copy names curr: none search-text: "" scroll-off: 0 srch/feel: make srch/feel [ redraw: func [face act pos][ face/color: pick face/colors face system/view/focal-face if all [face = system/view/focal-face face/text search-text] [ search-text: copy face/text search-all if 1 = length? name-list [this-name: first name-list update-entry show dex] ] ] ] update-file: func [data] [ set [path file] split-path names-path if not exists? path [make-dir/deep path] write names-path data ] save-file: has [buf] [ buf: reform [{REBOL [Title: "Name Database" Date:} now "]^/[^/"] foreach n names [repend buf [mold n newline]] update-file append buf "]" ] delete-name: does [ remove find/only names this-name if empty? names [append-empty] save-file new-name ] clean-names: function [][n][ forall names [ if any [empty? first names none? n: select first names 'name empty? n][ remove names ] ] names: head names ] search-all: function [] [ent flds] [ clean-names clear name-list flds: [name] either empty? search-text [insert name-list names][ foreach nam names [ foreach word flds [ if all [ent: select nam word find ent search-text][ append/only name-list nam break ] ] ] ] scroll-off: 0 sl/data: 0 resize-drag scroll-list curr: none show [rslt sl] ] new-name: does [ store-entry clear-entry search-all append-empty focus name ; update-entry ] append-empty: does [append/only names this-name: copy []] find-name: function [str][] [ foreach nam names [ if str = select nam 'name [ this-name: nam break ] ] ] store-entry: has [val ent flag] [ flag: 0 if not empty? trim name/text [ foreach word fields [ val: trim get in get word 'text either ent: select this-name word [ if ent val [insert clear ent val flag: flag + 1] ][ if not empty? val [repend this-name [word copy val] flag: flag + 1] ] if flag = 1 [flag: 2 updat/text: form now] ] if not zero? flag [save-file] ] ] update-entry: does [ foreach word fields [ insert clear get in get word 'text any [select this-name word ""] ] show rslt ] clear-entry: does [ clear-fields bx1 clear-fields bx2 updat/text: form now unfocus show dex ] show-names: does [ clear rslt/data foreach n name-list [ if n/name [append rslt/data n/name] ] show rslt ] scroll-list: does [ scroll-off: max 0 to-integer 1 + (length? name-list) - (100 / 16) * sl/data show rslt ] do resize-drag: does [sl/redrag 100 / max 1 (16 * length? name-list)] center-face dex new-name focus srch show-names view/new/title dex reform [app-title version] insert-event-func [ either all [event/type = 'close event/face = dex][ store-entry unview ][event] ] do-events ] ]

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  • How do you tell what object is being touched in touchesBegan?

    - by Flafla2
    I know that this is a very commonly asked question, but all of the answers on every website don't work! If you still don't know what I mean, then maybe this line of code will help you understand. - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { UITouch *touch = [[event allTouches] anyObject]; CGPoint location = [touch locationInView:self.view]; if (touch.view == nextbutton) [self performSelector:@selector(next)]; if (touch.view == prevbutton) [self performSelector:@selector(previous)]; if (touch.view == moreoptionsbutton) [self performSelector:@selector(moresettings)]; } It doesn't do anything when you touch nextbutton, prevbutton, and more optionsbutton, which are UIImageViews by the way. I have also tried using isEqual: instead of ==, but that hasn't worked out either. Any suggestions?

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  • C# Nested Repeater Accessing elements

    - by Rich
    I have a list of Accommodation objects bound to a Repeater, and then a nested Repeater which has the various attendee groups listed [e.g. Default, Seniors, Juniors]. This is all output fine, with the values displayed as LinkButtons, which when clicked gets sent to a code-behind event handler. Here is an example of the output to give you a picture [with some er... interesting attendee group names]: In the event handler, I test the object parameter to see which Repeater has been sent, as the outer repeater's links can also be clicked [so the Accommodation would be set, but no Attendee Group]. Is there a way to get a HiddenField from the outer RepeaterItem that contains the currently clicked inner repeater's LinkButton? E.g. From the image, I click the Attending link in the Women section. So the EventArgs via FindControl can get me the hidden field which contains the Attendee Group's ID, which is good, but I also need the Accommodation ID [to know whether it was either Wimbledon Hotel Inn or New Acc]

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  • Inter Widget Communication for iGoogle like portals

    - by bakore
    I was looking for a platform where widgets developed using various technologies like Java can communicate with each other. In other words When I add widgets to an interface I need them to talk to each other. For example A Click event in one widget should trigger an event in some other widget. I have been looking into the web for solutions and ways to do it, but couldnt find anything concrete. Any pointers or information on this would be great. Something like this http://blogs.sun.com/pdblog/entry/inter_widget_communication_in_cross Google also had a gadget to gadget communication API which was deprecated last year.

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  • JQuery UI sortable: restore position based on some condition

    - by dafi
    I call sortable.stop() to make an ajax call to store some data after drag&drop operation. When the ajax call returns an error (application logic error or net problem) I want to move the dragged element to its original/start position, how can I achieve it? The scenario should be user drags A to B the sortable.stop() event is called, it triggers an ajax call the ajax call returns an error inside the stop() event we get the ajax error move A to its original position user again move A to B everything is ok A remains in its new position in B Steps 6-8 are shown to clarify a successive drag can be done and previous error must be forgotten

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