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• Interface naming convention

  - by Frederick

  This is a subjective thing of course, but I don't see anything positive in prefixing interface names with an 'I'. To me, Thing is practically always more readable than IThing. My question is, why does this convention exist then? Sure, it makes it easier to tell interfaces from other types. But wouldn't that argument extend to retaining the Hungarian notation, which is now widely censured? What's your argument for that awkward 'I'? Or, more importantly, what could be Microsoft's?

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• Squid+iptables: how do i allow https to pass-through and bypassing Squid?

  - by logansama

  Hello, Basically started with Squid and iptables today (google is your friend). This stuff is going to be the death of me. I have Squid3 setup on Ubuntu 9.04 server as Transparent Proxy. It works sweetly when i use the proxy-box as my default gateway etc. The iptable rules for this setup was part of the tutorial. :P I can unfortunately not access https sites (such as Gmail or anything on port 443 basically). This is because Squid dont like what it cannot cache, which in this case is the https traffic. I would like to add an iptable rule so that i can basically access https sites and use Skype. Basically allow these types of traffic to pass through without going through Squid proxy? (bypassing it so to speak) Would anyone perhaps know how to do this or have a link to any sources that would assist me in figuring it out? Thank you.

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• How to disable typing in values in Dojo's NumberSpinner?

  - by callie16

  Hi, is there a way to disable typing in of values in the NumberSpinner of Dojo? Or is there a way for me to set back a previous value to it? Here's a sample situation: I have a spinner where the range is 1-3. However, the user types in an invalid value... say, a letter. The usual error handling happens. However, if the user deletes the value and focuses out (e.g. goes to another widget/control/etc. in the page), the spinner stays blank. Either I reset it to the last valid value or I disable typing so that the user can just use the up and down arrows to manipulate the widget. Any thoughts? Thanks!

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• How to design model for multi-tiered data?

  - by Chris

  Say I have three types of object: Area, Subarea and Topic. I want to be able to display an Area, which is just a list of Subareas and the Topics contained in those Subareas. I never want to be able to display Subareas separately - they're just for breaking up the Topics. Topics can, however, appear in multiple Areas (but probably under the same Subarea). How would I design a model for this? I could use ForeignKey from Topic to Subarea and from Subarea to Area, but it seems unnecessarily complex given that I never want to interact with subareas themselves. Also, none of these objects are ever altered or added to by the user. They're just for me to represent information. Maybe there is a better way to represent it all?

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• Using 50+ 3rd party web services, should I use BizTalk or just C#?

  - by typemismatch

  I'm building a back-end application that needs to fetch data on various schedules from over 50+ 3rd party web services and that number will continue to grow. The data from these services can currently be grouped into 3 types so each response needs to be mapped to 1 of 3 known schemas. Writing custom c# to hit each web service appears to be a management nightmare never mind having all that data mapping in code. The current thinking is build this on top of BizTalk 2009, still a lot of maintenance but at least a well defined platform with mapping/transformation capabilities already. I'm looking for any advise from anyone who might have done this before, does this really buy us anything? I am aware of a lack of polling features in BTS however there are enough work arounds to feel comfortable about the solution. Thanks!

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• Best way to convert between [Char] and [Word8]?

  - by cmars232

  I'm new to Haskell and I'm trying to use a pure SHA1 implementation in my app (Data.Digest.Pure.SHA) with a JSON library (AttoJSON). AttoJSON uses Data.ByteString.Char8 bytestrings, SHA uses Data.ByteString.Lazy bytestrings, and some of my string literals in my app are [Char]. This article seems to indicate this is something still being worked out in the Haskell language/Prelude: http // hackage.haskell.org/trac/haskell-prime/wiki/CharAsUnicode And this one lists a few libraries but its a couple years old: http //blog.kfish.org/2007/10/survey-haskell-unicode-support.html [Links broken because SO doesn't trust me -- whatever...] What is the current best way to convert between these types, and what are some of the tradeoffs? I don't want to pick something that is obsolete... Thanks!

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• New to VS.net (VB.net) 2008. Windows 7 aero glass stuff.

  - by StealthRT

  Hey all, i have been using VB.net 2008 for a few months and i have a question. I compiled my program and ran it in a VM running windows 7. However, the progress bar looks like it does in XP. It doesn't have that cool look to it like I've seen in many other programs running in windows 7. I have downloaded the 3.5 .net framework with sp1 and also the sdk for windows 7 (1.4+ gb dvd) but i still see nothing. Is there a check-box i am missing in VS 2008 to enable these types of features? Maybe some type of code i need to place in the program? Thanks! David

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• How to ensure consistency of enums in Java serialization?

  - by Uri

  When I serialize an object, I can use the serialVersionUID mechanism at the class level to ensure the compatibility of the two types. However, what happens when I serialize fields of enum values? Is there a way to ensure that the enum type has not been manipulated between serialization and deserialization? Suppose that I have an enum like OperationResult {SUCCESS, FAIL}, and a field called "result" in an object that is being serialized. How do I ensure, when the object is deserialized, that result is still correct even if someone maliciously reversed the two? (Suppose the enum is declared elsewhere as a static enum) I am wondering out of curiosity - I use jar-level authentication to prevent manipulation.

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• Accessing object's method within string

  - by Wild One

  Recently I was reading php documentation and found interesting note in string section: Functions, method calls, static class variables, and class constants inside {$} work since PHP 5. However, the value accessed will be interpreted as the name of a variable in the scope in which the string is defined. Using single curly braces ({}) will not work for accessing the return values of functions or methods or the values of class constants or static class variables. See www.php.net/manual/en/language.types.string.php It says, that I can't use curly syntax to get value returned by object's method call. Is it a mistake in manual or I misunderstood it, because I tried the following code and it works just fine: <?php class HelloWorld { public static function hello() { echo 'hello'; } } $a = new HelloWorld(); echo "{$a->hello()} world";

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• Design pattern: Polymorphism for list of objects

  - by ziang

  Suppose I have a class A, and A1, A2 inherits from A. There are 2 functions: List<A1> getListA1(){...} List<A2> getListA2(){...} Now I want to do something similar to both A1 and A2 in another function public void process(List<A>){...} If I want to pass the instance of either ListA1 or ListA2, of course the types doesn't match because the compiler doesn't allow the coercion from List< A1 to List< A. I can't do something like this: List<A1> listA1 = getListA1(); List<A> newList = (List<A>)listA1; //this is not allowed. So what is the best approach to the process()? Is there any way to do it in a universal way rather than write the similar code to both List and List?

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• Can I use Google Maps API (Places API) in my iPhone app to find locations near me?

  - by Mark

  I have a couple of questions regarding using Google maps API, especially the Places API in my iPhone application. Can I use Places API in my iPhone app and still release the app as a paid app? Could I release my app as free if I am unable to use these APIs in a paid app? Is there an example for figuring out store locations around user's current location using Places API? For example if the user types "Groceries" in the app, I would like to show all the Store that sell groceries near the user's location. Thanks!

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• How to draw multiple line text to uiimageview iphone?

  - by Hu?nh Phong

  I have UITextView for text, after user press DONE, I convert text to UIImageView and show it. It works with one line of text very good, and Screenshot 1 . But if user types two lines, or more: the result is still one line??? Screenshot 2 I want to display two or more lines in UIimageView Can anybody help me! Thank you very much! Here is my code: -(UIImage *)convertTextToImage : (ObjectText *) objT; { UIGraphicsBeginImageContext(CGSizeMake(([objT.content sizeWithFont:objT.font].width+10), ([objT.content sizeWithFont:objT.font].height+10))); [[objT getcolor] set]; [objT.content drawAtPoint:CGPointMake(5, 5) withFont:objT.font]; UIImage *result = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); return result; }

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• grailsApplication not getting injected in a service , Grails 2.1.0

  - by vijay tyagi

  I have service in which i am accessing few configuration properties from grailsApplication I am injecting it like this class MyWebService{ def grailsApplication WebService webService = new WebService() def getProxy(url, flag){ return webService.getClient(url) } def getResponse(){ def proxy = getProxy(grailsApplication.config.grails.wsdlURL, true) def response = proxy.getItem(ItemType) return response } } When i call getProxy() method, i see this in tomcat logs No signature of method: org.example.MyWebService.getProxy() is applicable for argument types: (groovy.util.ConfigObject, java.lang.Boolean) values: [[:], true] Possible solutions: getProxy(), getProxy(java.lang.String, boolean), setProxy(java.lang.Object) which means grailsApplication is not getting injected into the service, is there any alternate way to access configuration object ? according to burtbeckwith's post configurationholder has been deprecated, can't think of anything else. Interestingly the very same service works fine in my local IDE(GGTS 3.1.0), that means locally grailsApplication is getting injected, but when i create a war to deploy to a standalone tomcat, it stops getting injected.

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• Create an Action<T> to "set" a property, when I am provided with the LINQ Expression for the "get"

  - by Alex

  I'd like to be able to generate a compiled expression to set a property, given the lambda expression that provides the "get" method for a property. Here's what I'm looking for: public Action<int> CreateSetter<T>(Expression<Func<T, int>> getter) { // returns a compiled action using the details of the getter expression tree, or null // if the write property is not defined. } I'm still trying to understand the various types of Expression classes, so if you can point me in the right direction that would be great.

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• C input loop for shell

  - by AustinM

  So I'm working on creating a very simple C program that just preforms shell commands. This is what I have so far: #include <stdio.h> int main() { char input[30]; fputs("$ ", stdout); fflush(stdout); fgets(input, sizeof input, stdin); system(input); } It works, but only for one command. For example if I compile and type ./cmd I get the $ prompt. If I type ls I get what I'm supposed to get. But then it exits and goes back to the regular system shell. How can I make it so after the user types a command it goes back to the "$" input.

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• Date or String declaration in a javabean

  - by Jeff

  Should I declare an attribute in a javabean that holds a date value a user types in on an HTML form as a String or Date? I feel I should declare as a Date, however, since I do server validation on all form data, if the date doesn't validate, when I pass the form bean back to the jsp view for correcting, I lose the date value that the user tried to type in. If I declare as a String, if the date doesn't validate, I'm able to set the string value in the bean and pass the bean back to the view and the user can see what they incorrectly typed. But with a String declaration for Date inputs I forsee problems down the road with my DAO. I want to be able to use a DAO utility which generates a prepare statement using setObject. In my html form I request dates to be mm/dd/yyyy and in DAO i'm using Oracle Date. I can not use hibernate or such, since this is a corporate intranet. What is the best practice "pattern" I should be following??

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• Talking with a Bittorrent client listening on a port?

  - by Legend

  I have one of my computers seeding a torrent file on port 45000. I am trying to write a small client in python (or perhaps perl) that helps me to determine the types of messages this client supports for which I need to perhaps do a handshake with the client. In Azureus, this is done using a call like peer.getSupportedMessages(). Is it possible to do this using some library in python or perl? An example of the returned messages would look like this: BT_KEEP_ALIVE BT_PIECE BT_REQUEST BT_UNCHOKE BT_UNINTERESTED BT_SUGGEST_PIECE BT_HAVE_ALL BT_HAVE_NONE BT_REJECT_REQUEST BT_ALLOWED_FAST BT_LT_EXT_MESSAGE BT_DHT_PORT lt_handshake ut_pex

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• How to convert all images to JPG format in PHP?

  - by SzamDev

  I am developing a website in PHP that let the user to upload images and then let him to decide how the image should be using jQuery - PHP integeration to select the area that wanted to be the picture and then click the crop button to crop it and save it. The problem that I am facing is that not all images type are good to crop and save so I noticed that the easy solution for it to convert the image to JPG and then let the user to crop it because it's the easy way to do it in JPG format. How I can do it? Is this the best solution for images types problem?

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• Flex: How to create a floating notification message of sorts for a custom component?

  - by aberrant80

  I have a custom TextInput-based component for date and time with certain restrictions on what's considered "within range". But it's still fine to insert dates that are outside the range. When a user types in a date, on valueCommit, I'd like to be able to display a hovering notification to the user, to inform/warn them that the date is outside the accepted range. I'm thinking of notifications ala the Validators, but I'd rather not use the Validator mechanism because it's really not validation, just notification. Something like a tooltip, but it will only appear if the user changed the value. Maybe an effect of some sort? If anyone has any ideas or if anyone has done something like this, I'm all ears!

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• What are the disadvantages of using a StringBuilder?

  - by stickman

  I know that StringBuilder is more efficient than a normal string when processing code which modifies the string value a lot because although strings act like value types, they are actually reference, which makes them immutable so every time we change it, we need to create a new reference in memory. My question is that, why doesn't .NET just use stringBuilder by default? There must be some disadvantages of it over just using String. Can anyone tell me what they are? The only thing I can think of is perhaps it is a heavier object and it takes more time to instantiate so if you aren't changing the string too much, this would override the benefits of StringBuilder

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• Mapping to a different view based on child type

  - by Ryan Burnham

  So i have a situation where i have common base type but i need to map to a different view based on the child type. It looks like i can use a generic mapping class to handle the inheritance http://geekswithblogs.net/nharrison/archive/2010/07/09/inheriting-a-class-map-in-fluent-nhibernate.aspx But how can i conditionally map to a different view based on the child type? I see an EntityType property but it says its obsolete and will be made private in the next version. As an example i have a base class of ContactInfo is standard between contact types but the values come from different places depending on the contact type, this I'll handle through the sql view.

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• extending Bash tab completion: how to handle paths / partial commands?

  - by Rawing

  I've added tab completion for my program to bash. It works quite well, but I don't know how to handle partial completion of words. Example: the user types ./program /home/user/De and presses TAB. This is then completed to ./program /home/user/Desktop/ , but there's now a trailing whitespace after 'Desktop/', which is not what I want. Basically, I need a way of preventing bash from adding whitespace after the completed word. I don't want to use bash's completion for paths.

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• MS VC++ 6 class wizard

  - by Shane MacLaughlin

  Ok, I'm developing an application that has been in pretty much continous development over the last 16 years, from C in DOS, through various flavours of C++ and now is largely based around C++ with MFC and StingRay GUIs and various other SDKs. While I use VS 2005 for the release builds, I still use MSVC 6 for much of the GUI building, simply because ClassWizard is so much quicker in this environment than the weak equivalent tools that followed. Note that I am using ClassWizard to automatically generate code for my own user defined types (see Custom DDXs) and I like to add a lot of member variables and methods in one go. Creating them one at a time as per later versions of Visual Studio for me is a big backward step. At the same time, working with multiple IDEs is also a pain. My question is in two parts; Is there any way of getting ClassWizard to work is VS 2005 or VS 2008? Is there any drop in replacement, or alternative IDE, that provides similar levels of productivty for old C++ hacks such as myself?

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• How do I produce an external URL as part of a replace_html call in Ruby on Rails?

  - by vlasits

  Basically, I am attempting to render an external website (the url of which is stored in the database) into a page in my Ruby on Rails app. I have a field in my model 'search' called 'search' that contains web addresses with the form 'www.example.com' or 'example.com'. I am trying to use a link_to_function call with replace_html to replace the 'maincontent' div with an iframe tag using the value of 'search' in the current instance as the src for the tag. My current attempt is the very ugly code below. I'd be grateful for either of the following types of responses: How can I rewrite the concatenation string to work correctly? How can I get the same effect (replacing the current content of the "mainContent" div with an iframe tag using a different method? (I had to modify the code before to remove the < from the iframe) link_to_function h(search.title) do |page| page.replace_html 'mainContent', 'iframe id="embedded" src="http://" + #{search.search} />' end

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• Fractional Calculator in Java

  - by user2888881

  I am trying to create a fractional calculator in Java with inputs of mixed fractions, proper fractions, improper fractions or integers. It should include the four basic operators as well. The program should be set up as a loop where it is continuous until the user types "quit". I have coded the beginning loop but have no idea where to go from there. Please help, I am a beginner and would really appreciate it. Thank you again. This is what I have so far: import java.util.*; public class FractionCalculator { private static Scanner input; public static void main(String[] args) { input = new Scanner(System.in); String x = "quit"; System.out.println("Enter a fraction"); while (true) { String y = input.next(); if (y.equals(x)) { break; } } } }

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