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• Which subjects in (theorethical) computer science matter the most in practice?

  - by Anto

  As you should know, computer science and software engineering aren't the same thing. My question is which subjects in computer science are (in your opinion) most important for software engineers and most applicable in practice? Please don't talk about "niche" areas of computer science (e.g. compiler construction) because of the usage of that inside that niche (e.g. helps you create compilers), but instead about areas which might be applicable and useful in a wide spectrum of software engineering problems and jobs (e.g helps you with parsing structured text).

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• Is it a bad practice to have an interface to define constants?

  - by FabianB

  I am writing a set of junit test classes in java. There are several constants, for example strings that I will need in different test classes. I am thinking about an interface that defines them and every test class would implement it. The benefits I see there are: easy access to constants: "MY_CONSTANT" instead of "ThatClass.MY_CONSTANT" each constant defined only once Is this approach rather a good or bad practice? I feel like abusing the concept of interfaces a little bit. You can answer generally about interfaces/constants, but also about unit tests if there is something special about it.

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• Images from remote source - is it possible or is really a bad practice?

  - by user1620696

  I'm building a management system for websites and I had an idea related to image galleries that I'm not sure it's a good approach. Since images might need good deals of space depending on how much images a user uploads an so on, I thought on using cloud services like dropbox, mega and google drive to store images and load then when needed. The obvious problem is that for me this seems a useless solution because it would be slow to download the images from the remote source, making the user experience not so good. Is there any way to save images of a image gallery on remote source without getting the user experience bad because of speed? Or this is really not a good practice?

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• Is it a bad practice to quit a company only to begin as a consultant? [closed]

  - by niwi

  Like the title says; is it a bad practice to quit a company after a few years, only to begin as a consultant for the same 'customer'? I've been lucky enough to come in to a company in the oil business from the beginning, developing software for relatively new and unused technology. Long before I even got this job, I've wanted to start my own consulting firm. Is it morally wrong of me to quit my job after a few years, only to hire myself out as a 'specialist' or consultant on our systems?

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• Is `catch(...) { throw; }` a bad practice?

  - by ereOn

  While I agree that catching ... without rethrowing is indeed wrong, I however believe that using constructs like this: try { // Stuff } catch (...) { // Some cleanup throw; } Is acceptable in cases where RAII is not applicable. (Please, don't ask... not everybody in my company likes object-oriented programming and RAII is often seen as "useless school stuff"...) My coworkers says that you should always know what exceptions are to be thrown and that you can always use constructs like: try { // Stuff } catch (exception_type1&) { // Some cleanup throw; } catch (exception_type2&) { // Some cleanup throw; } catch (exception_type3&) { // Some cleanup throw; } Is there a well admited good practice regarding these situations?

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• How to style alternating rows in asp.net mvc

  - by YeahStu

  I am using a <% foreach ...% loop to list a collection of items on my website. I want to add a different background color for the style of alternating rows in my list. I have found a way to do this but I am not satisfied with it as it seems like a hack. Here is what I have done to solve it so far: <table> <% int counter = 0; foreach (var item in Model) { counter++; if (counter % 2 == 0) { %> <tr class="colorfull"> <% } else { %> <tr> <% } %> ... Is there a best practice that I am missing that people are using for this scenario in ASP.NET MVC?

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• Current state of client-side XSLT

  - by Casey

  Last I heard, Blizzard was one of the few companies to put client-side XSLT into practice (2008). Is this still the case in 2011, or are more people now exploring this technique in production?  It seems that modern browsers (IE9, FF4, Chrome) and client processing power are primed to exploit this standard for tangible savings in server CPU power and bandwidth on large scale properties. Am I missing something? The negative aspects I'm aware of include * additional rendering time * additional assets required on uncached page load * additional layer of complexity * noticably less developer experience than server-side template techniques The benefits I perceive include * distributed template composition (offloaded on the client) * caching of common template fragments offloaded on the client * logical separation of document structure and data * well-documented web standard supported by all modern browsers Finally, although I know it's impossible to predict the future, I am curious to know opinions on whether or not client-side XSLT's day will come. With interest in HTML5 driving users to upgrade their browsers and developers to explore new techniques, I would say yes. How about you? Thanks in advance, Casey

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• Why not use javascript handlers on the body element?

  - by disown

  As an answer to the question of 'How do you automatically set the focus to a textbox when a web page loads?', Espo suggests using <body onLoad="document.getElementById('<id>').focus();"> Ben Scheirman replies (without further explanation): Any javascript book will tell you not to put handlers on the body element like that Why would this be considered bad practice? In Espos answer, an 'override' problem is illustrated. Is this the only reason, or are there any other problems? Compatibility issues?

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• Should image size be defined in the img tag height/width attributes or in CSS?

  - by Benjamin Manns

  Is it better coding practice to define an images size in the img tag's width and height attributes? <img src="images/academia_vs_business.png" width="740" height="382" alt="" /> Or in the CSS style with width/height? <img src="images/academia_vs_business.png" style="width:740px; height:382px;" alt="" /> Or both? <img src="images/academia_vs_business.png" width="740" height="382" style="width:740px; height:382px" alt="" />

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• Design Web Templates

  - by Pradeep

  Hi, I am a PHP, VB.NET programmer and i like to build websites. I am good at coding but have never done website designing. Please suggest me some good study resource on Photoshop and flash website design. I have recently made few templates on photoshop but don't know how to code them for valid HTML-CSS. Please let me know which is the best method to design website template e.g. Photoshop, DreamWeaver etc. Also provide links to good study and practice resource for the same. Thanks in advance.

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• document.getElementByID - checking whether an element has been found or not

  - by be here now

  Hi, guys. Here's a sample code, that opens an internet explorer window, navigates to google, and gets some element on the page by its unique id: set ie = CreateObject("InternetExplorer.Application") ie.navigate("www.google.com") ie.visible = true while ie.readystate <> 4 wscript.sleep 100 WEnd set some_object = ie.document.getelementbyid("xjsc") MsgBox some_object.tagname, 0 This sample brings me a DIV popup, which satisfies me completely. But at the next step I'd like to check whether some id exists in the page, or not. Unfortunately, I can't just be, like, set some_object = ie.document.getelementbyid("some_non_existant_id") if some_object.tagname = "" then ... because it gives me the following error: ie.vbs(12, 1) Microsoft VBScript runtime error: Object required: 'some_object' So, what's the best practice to check whether an element has been found or not?

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• Need help from CSS purist!

  - by Darcy

  I'm beginning to use CSS more and more but I'm not sure if I'm using it as intended in all cases. I have classes named things like 'box' that will wrap the content inside it with a border, which seems like good CSS to me. On the other hand I have classes like 'margin-right-5' and 'float-left' that sets the css to margin-right: 5px and float:left respectively. I'm wondering if this is good practice. Then in my markup I'd do something like: <div class="box float-left margin-right-5"> <!-- CONTENT HERE --> </div> Sometimes I may want to float right or not have a margin at all and still use the 'box' class, so I use several classes in order to make the css more flexible. Am I destroying the principles of CSS?

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• Is it possible to use an input within a <label> field?

  - by javanix

  I have a bunch of optional "write-in" values for a survey I'm working on. These are basically a radio button with a textbox within the answer field - the idea being that you would toggle the button and write something into the box. What I'd like to do is have the radio button toggled whenever a user clicks in the text field - this seems like a use-case that makes a lot of sense. Doing this: <input type="radio" id="radiobutton"><label for="radiobutton">Other: <input type="text" id="radiobutton_other"></label> works fine in Chrome (and I am guessing, other WebKit browsers as well), but there are weird selection issues in Firefox, so I'm assuming its a non-standard practice that I should stay away from. Is there a way to replicate this functionality without using JavaScript? I have an onclick function that will work, but we're trying to make our site usable for people who might have NoScript-type stuff running.

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• jQuery get value from checked element with a given name

  - by Travis Leleu

  I've got an input like so: I'd like to use jQuery to grab that element, and add the function call foo() to the change event. Currently I can get it done, but there are two hacks involved. My (working) code: $(":input[name*=myfield]").change( function( $(":input[name*=myfield]") ) { foo(); }); )}; There are two hacks in there I'd like to eliminate. Keeping in mind that the input names are multidimensional arrays, how can I use the :input[name=somename], versus [name*=someone]? I'd imagine it's faster using an exact name rather than *=, but I can't get the escape sequence correct for the brackets on the multidimensional arrays. Can I chain the call together so that I don't have to select the element twice? Is the standard practice for that to select the HTML element into a var, then use that var? Or can I chain it together? Thanks for the help. Still working on getting my footing in JS/JQ.

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• Is it bad to have the <link> tag for hCard when there is no hCard on that page?

  - by Evan Carroll

  I'm just wondering if it is bad practice to put the <link> tag for hCard profile on every page, if you don't know that the page being rendered has an hCard. My site has hCards - is it worth trimming the link tag out of the pages that don't have them? <link rel="profile" href="http://microformats.org/profile/hcard"> Does this mean this page has an hCard or look for an hCard on this page? Does it mean interpret an hCard as specified, if found? Obviously, you can pull in stylesheets using <link> but they apply to the page. I don't even see anything at that destination other than some sub-par hCard documentation.

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• height: auto does not work to automatically resize header

  - by slevin

  I'm trying to do a simple thing in CSS I have a header tag and inside that a couple of h tags. So, in order to have a responsive design I do height:auto; inside the header tag, so it will automatically stretch to contain the h tags. Right? But does not work, headeris just a line in the top of the page. t should stretch to contain the titles, right? What am I missing? Is it a good practice to put CSS in the h tags and not style header at all? So h tags will be like the header in user's eye? Thanks in advence Check it here

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• Is it a good practice to run identd in 2010?

  - by Alex R

  I know in the "old days" it was good practice to shut this off. But nowadays I have heard that it improves deliverability of email. In the old days people were not worried about spam (or having their outbound email rejected), so that made sense. Of course, the question is only relevant to servers that send email. What is the current, common practice among discerning Linux admins? Run identd or leave it off? Thanks

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• ASP.Net MVC 2 DropDownListFor in EditorTemplate

  - by tschreck

  I have a view model that looks like this: namespace AutoForm.Models { public class ProductViewModel { [UIHint("DropDownList")] public String Category { get; set; } [ScaffoldColumn(false)] public IEnumerable<SelectListItem> CategoryList { get; set; } ... } } It has Category and CategoryList properties. The CategoryList is the source data for the Category dropdown UI element. I have an EditorTemplate that looks like this: <%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl<ProductViewModel>" %> <%@ Import Namespace="AutoForm.Models"%> <%=Html.DropDownListFor(m => m.Category , Model.CategoryList ) %> NOTE: this EditorTemplate is strongly typed to ProductViewModel My Controller is populating CategoryList property with data from a database. I cannot get the DropDownListFor template to render a drop down list with data from CategoryList. I know CategoryList is getting populated with data in the controller because I see the data when I debug and step through the controller. Here's my error message in the browser: Server Error in '/' Application. Object reference not set to an instance of an object. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.NullReferenceException: Object reference not set to an instance of an object. Source Error: Line 2: <%@ Import Namespace="AutoForm.Models"% Line 3: Line 4: <%=Html.DropDownListFor(m = m.Category, Model.CategoryList) % Source File: c:\ProjectStore\AutoForm\AutoForm\Views\Shared\EditorTemplates\DropDownList.ascx Line: 4 Any ideas? Thanks Tom As a followup, I noticed that ViewData.Model is null when I'm stepping through the code in the EditorTemplate. I have the EditorTemplate strongly typed to "ProductViewModel" which is also the type that's passed to the View in the controller. I'm perplexed as to why ViewData.Model is null even though it's getting populated in the controller before getting passed to the view.

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• Struts 2 development with Dreamweaver

  - by Matthew

  Does anyone here use Dreamweaver for Struts development? I've been working on a web application using Eclipse/vi, but want to use Dreamweaver so that I can apply some nice looking Dreamweaver templates. I looked for tutorials on Struts development with Dreamweaver, but couldn't find any, and when I tried to import my page, a lot of stuff was broken, which I guess is expected since a lot of the html is dynamically generated by servlets/jsps. So, has anyone had any luck with dreamweaver/struts and if so, could you share how you configured it?

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• How to disable Cufon on certain elements?

  - by Shadi Almosri

  Hiya, I currently use Cufon accross our site with something similar to Cufon.set('fontFamily', 'DIN Medium').replace('h1'); Now for a single H1 tag i would like Cufon to be disabled, this is without changing the H1 tag to any other tag, it must remain as it is. I can add classes etc to the H1 tag if required, and can do any HTML/CSS/JS just not changing the actual tag. Anyone know if this is possible and if it is how? Thanks in advance, Shadi

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• Ported version of WKHTMLTOPDF in .NET

  - by markattwood

  Hi, I have been searching for a good tool for .NET to convert HTML to PDF and found out that WKHTMLTOPDF is good, but it's for C++. Is there any C# version of this tool? I know some commercial .NET tools but I dont want to spend money for them.

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• Enforce numbers in mobile web form

  - by Peter Smit

  I have a simple webform targeted for Opera Mini and Opera Mobile. I'm using just a HTML input element. Now I would like to restrict the element to only have integer numbers. Is there a way to enforce this in this browser (possible even that the phone will have it's number mode on when entering the form)? And if I wanted to allow floats, is something possible then?

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• SAXException: bad envelope tag

  - by David Guzman

  I'm trying to connect to a webservice https protected through a webservice client. Eclipse generated a stub based webservice client and looks nice to me. The problem comes when I try to call a method from the webservice: String a = (String)webservice.userProfileServices(xml); I'm also using the following SOAP headers: esgGatewayPort = (new EsgGatewayLocator()).getesgGatewayPort(); //setting the authentication header PrefixedQName name = new PrefixedQName("http://schemas.xmlsoap.org/ws/2002/07/secext","Security","wsse"); System.out.println("Setting headers for authentication"); org.apache.axis.message.SOAPHeaderElement sh = new org.apache.axis.message.SOAPHeaderElement(name); SOAPElement sub; try { String clntUserName="myUser"; String clntPassword="myPassword"; sub = sh.addChildElement("UsernameToken"); SOAPElement element = sub.addChildElement("Username"); element.addTextNode(clntUserName); element = sub.addChildElement("Password"); element.addTextNode(clntPassword); ((org.apache.axis.client.Stub) esgGatewayPort).setHeader(sh); } catch (SOAPException e) { e.printStackTrace(); } I receive the following: AxisFault faultCode: {http://schemas.xmlsoap.org/soap/envelope/}Server.userException faultSubcode: faultString: org.xml.sax.SAXException: Bad envelope tag: HTML faultActor: faultNode: faultDetail: {http://xml.apache.org/axis/}stackTrace:org.xml.sax.SAXException: Bad envelope tag: HTML at org.apache.axis.message.EnvelopeBuilder.startElement(EnvelopeBuilder.java:71) at org.apache.axis.encoding.DeserializationContext.startElement(DeserializationContext.java:1048) at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl$NSContentDriver.scanRootElementHook(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source) at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source) at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source) at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source) at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source) at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source) at weblogic.xml.jaxp.WebLogicXMLReader.parse(WebLogicXMLReader.java:133) at weblogic.xml.jaxp.RegistryXMLReader.parse(RegistryXMLReader.java:153) at javax.xml.parsers.SAXParser.parse(Unknown Source) at org.apache.axis.encoding.DeserializationContext.parse(DeserializationContext.java:227) at org.apache.axis.SOAPPart.getAsSOAPEnvelope(SOAPPart.java:696) at org.apache.axis.Message.getSOAPEnvelope(Message.java:435) at org.apache.axis.transport.http.HTTPSender.readFromSocket(HTTPSender.java:796) at org.apache.axis.transport.http.HTTPSender.invoke(HTTPSender.java:144) at org.apache.axis.strategies.InvocationStrategy.visit(InvocationStrategy.java:32) at org.apache.axis.SimpleChain.doVisiting(SimpleChain.java:118) at org.apache.axis.SimpleChain.invoke(SimpleChain.java:83) at org.apache.axis.client.AxisClient.invoke(AxisClient.java:165) at org.apache.axis.client.Call.invokeEngine(Call.java:2784) at org.apache.axis.client.Call.invoke(Call.java:2767) at org.apache.axis.client.Call.invoke(Call.java:2443) at org.apache.axis.client.Call.invoke(Call.java:2366) at org.apache.axis.client.Call.invoke(Call.java:1812) Any help will be truly appreciated David

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• Hide cursor in Chrome (and IE)

  - by Chris

  I have the following CSS that hides the mouse cursor for anything on the web page. It works perfectly in FireFox but in IE and and Chrome it doesn't work. html { cursor: none; } In Chrome I always see the mouse pointer. In IE however I see whatever cursor was last 'active' when it entered the screen. Presumably it's keeping the last selection instead of removing it.

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• How can I set fancyBox's contents dynamically?

  - by alex

  I have tried $('.selector').fancybox({ scrolling : 'no', titleShow : false, type : 'inline', content : '<p>hello</p>' But it did not work I have also tried adding the option onComplete: function() { $('#fancybox-inner').html(contents); } Except then when fancyBox is closed, it will not launch again. How can I dynamically set the contents of fancyBox, and retain all of it's functionality? Thanks

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