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  • Scala puts precedence on implicit conversion over "natural" operations... Why? Is this a bug? Or am

    - by Alex R
    This simple test, of course, works as expected: scala var b = 2 b: Int = 2 scala b += 1 scala b res3: Int = 3 Now I bring this into scope: class A(var x: Int) { def +=(y:Int) { this.x += y } } implicit def int2A(i:Int) : A = new A(i) I'm defining a new class and a += operation on it. I never expected this would affect the way my regular Ints behave. But it does: scala var b:Int = 0 b: Int = 0 scala b += 1 scala b res29: Int = 0 scala b += 2 scala b res31: Int = 0 Scala seems to prefer the implicit conversion over the natural += that is already defined to Ints. That leads to several questions... Why? Is this a bug? Is it by design? Is there a work-around (other than not using "+=")? Thanks

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  • C# language questions

    - by Water Cooler v2
    1) What is int? Is it any different from the struct System.Int32? I understand that the former is a C# alias (typedef or #define equivalant) for the CLR type System.Int32. Is this understanding correct? 2) When we say: IComparable x = 10; Is that like saying: IComparable x = new System.Int32(); But we can't new a struct, right? or in C like syntax: struct System.In32 *x; x=>someThing = 10; 3) What is String with a capitalized S? I see in Reflector that it is the sealed String class, which, of course, is a reference type, unlike the System.Int32 above, which is a value type. What is string, with an uncapitalized s, though? Is that also the C# alias for this class? Why can I not see the alias definitions in Reflector? 4) Try to follow me down this subtle train of thought, if you please. We know that a storage location of a particular type can only access properties and members on its interface. That means: Person p = new Customer(); p.Name = "Water Cooler v2"; // legal because as Name is defined on Person. but // illegal without an explicit cast even though the backing // store is a Customer, the storage location is of type // Person, which doesn't support the member/method being // accessed/called. p.GetTotalValueOfOrdersMade(); Now, with that inference, consider this scenario: int i = 10; // obvious System.object defines no member to // store an integer value or any other value in. // So, my question really is, when the integer is // boxed, what is the *type* it is actually boxed to. // In other words, what is the type that forms the // backing store on the heap, for this operation? object x = i;

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  • Help me vaildate these points regarding Ruby

    - by Bragaadeesh
    Hi, I have started learning Ruby for the past 2,3 weeks and I have come up with some findings on the language. Can someone please validate these points. Implemented in many other high level languages such as C, Java, .Net etc., Is slow for the obvious reason that it cannot beat any of the already known high level languages. Should never be compared with any other high level language. Not suitable for large applications. Completely open source and is in a budding state. Has a framework called Rails which claims that it would be good for Agile development Community out there is getting better day by day and finding help immediately should not be a problem as time goes by. Has significant changes between releases which many developers wont welcome right away. Running time cannot be comprehensively estimated since the language has several underlying implementation in several languages. Books are always outdated by the time when you finish them. Thanks.

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  • Poll: What is stopping you from switching (from Java) to Scala ?

    - by Lukasz Lew
    What would make you to switch to Scala ? If you are negative on the switching to Scala, please state the reason as well (or upvote). As with all StackOverflow Poll type Q&As, please make certain your answer is NOT listed already before adding a new answer If it already exists, vote that one up so we see what the most popular answer is, rather than duplicating an existing entry. If you see a duplicate, vote it down. If you have interesting or additional information to add, use a comment or edit the original entry rather than creating a duplicate.

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  • How to define a ternary operator in Scala which preserves leading tokens?

    - by Alex R
    I'm writing a code generator which produces Scala output. I need to emulate a ternary operator in such a way that the tokens leading up to '?' remain intact. e.g. convert the expression c ? p : q to c something. The simple if(c) p else q fails my criteria, as it requires putting if( before c. My first attempt (still using c/p/q as above) is c match { case(true) = p; case _ = q } another option I found was: class ternary(val g: Boolean = Any) { def |: (b:Boolean) = g(b) } implicit def autoTernary (g: Boolean = Any): ternary = new ternary(g) which allows me to write: c |: { b: Boolean = if(b) p else q } I like the overall look of the second option, but is there a way to make it less verbose? Thanks

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  • The new Google Analytics - what new useful features have you found?

    - by Rob
    If you don't know already a new version of Google Analytics has just come out. On first initial views it doesn't seem like much of an improvement on the previous version. There's lot's linking to Google's social stats but I'm yet to see the value of that. Also it doesn't seem to make the best use of the important data, it's tending to push referral sites, keywords to the back and bring the less important data to the front. Is that a sign of things to come??? One feature I did find interesting was the visitors flow as it shows the visitors path through your site. What new features have you found useful/interesting?

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  • Lesser-known Github features that I'm missing out on with Bitbucket? [closed]

    - by Ghopper21
    I've been using Bitbucket for my small-team development projects, with the assumption that it is more-or-less a Github clone with pricing that is better for my situation and support for Mercurial (which I don't need). However, I'm seeing there are material-if-not-overwhelming differences, e.g. Github's appealing and useful branches page versus Bitbucket's overly simple branch drop-down list. This makes me wonder: what else am I missing out on? What are the lesser known Github features that folks like me using Bitbucket to save money are missing out on? EDIT: following closure, I've asked for advice on making this question productive over at meta. See here.

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  • How do I balance program CPU reverse compatibility whist still being able to use cutting edge features?

    - by TheLQ
    As I learn more about C and C++ I'm starting to wonder: How can a compiler use newer features of processors without limiting it just to people with, for example, Intel Core i7's? Think about it: new processors come out every year with lots of new technologies. However you can't just only target them since a significant portion of the market will not upgrade to the latest and greatest processors for a long time. I'm more or less wondering how this is handled in general by C and C++ devs and compilers. Do compilers make code similar to if SSE is supported, do this using it, else do that using the slower way or do developers have to implement their algorithm twice, or what? More or less how do you release software that takes advantage of newer processor technologies while still keeping a low common denominator?

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  • New Features, Fresh Competitive Edge: Help Your Customers Get the Most from Oracle RightNow Cloud Service by Sandi Main

    - by Tuula Fai
    Are your customers taking full advantage of their customer service solution? If they’re not up-to-speed with the new features of Oracle RightNow Cloud Service, this is their chance to catch up—and gain competitive advantage. Invite customers to join our live Webcast on Thursday, July 16, for a rapid overview of Oracle RightNow Cloud Service's most powerful new capabilities and what they mean for their organization. They’ll learn how they can: Take full advantage of RightNow's evolution under Oracle Stay ahead of the competition with key innovations and enhancements Upgrade with confidence based on other user experiences Don't miss the chance to help your customers deliver an even smarter customer experience.  Click here for the Evite to send to your customers.

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  • Who could ask for more with LESS CSS? (Part 1 of 3&ndash;Features)

    - by ToStringTheory
    It wasn’t very long ago that I first began to get into CSS precompilers such as SASS (Syntactically Awesome Stylesheets) and LESS (The Dynamic Stylesheet Language) and I had been hooked on the idea since.  When I finally had a new project come up, I leapt at the opportunity to try out one of these languages. Introduction To be honest, I was hesitant at first to add either framework as I didn’t really know much more than what I had read on their homepages, and I didn’t like the idea of adding too much complexity to a project - I couldn’t guarantee I would be the only person to support it in the future. Thankfully, both of these languages just add things into CSS.  You don’t HAVE to know LESS or SASS to do anything, you can still do your old school CSS, and your output will be the same.  However, when you want to start doing more advanced things such as variables, mixins, and color functions, the functionality is all there for you to utilize. From what I had read, SASS has a few more features than LESS, which is why I initially tried to figure out how to incorporate it into a MVC 4 project. However, through my research, I couldn’t find a way to accomplish this without including some bit of the Ruby on Rails framework on the computer running it, and I hated the fact that I had to do that.  Besides SASS, there is little chance of me getting into the RoR framework, at least in the next couple years.  So in the end, I settled with using LESS. Features So, what can LESS (or SASS) do for you?  There are several reasons I have come to love it in the past few weeks. 1 – Constants Using LESS, you can finally declare a constant and use its value across an entire CSS file. The case that most people would be familiar with is colors.  Wanting to declare one or two color variables that comprise the theme of the site, and not have to retype out their specific hex code each time, but rather a variable name.  What’s great about this is that if you end up having to change it, you only have to change it in one place.  An important thing to note is that you aren’t limited to creating constants just for colors, but for strings and measurements as well. 2 – Inheritance This is a cool feature in my mind for simplicity and organization.  Both LESS and SASS allow you to place selectors within other selectors, and when it is compiled, the languages will break the rules out as necessary and keep the inheritance chain you created in the selectors. Example LESS Code: #header {   h1 {     font-size: 26px;     font-weight: bold;   }   p {     font-size: 12px;     a     {       text-decoration: none;       &:hover {         border-width: 1px       }     }   } } Example Compiled CSS: #header h1 {   font-size: 26px;   font-weight: bold; } #header p {   font-size: 12px; } #header p a {   text-decoration: none; } #header p a:hover {   border-width: 1px; } 3 - Mixins Mixins are where languages like this really shine.  The ability to mixin other definitions setup a parametric mixin.  There is really a lot of content in this area, so I would suggest looking at http://lesscss.org for more information.  One of the things I would suggest if you do begin to use LESS is to also grab the mixins.less file from the Twitter Bootstrap project.  This file already has a bunch of predefined mixins for things like border-radius with all of the browser specific prefixes.  This alone is of great use! 4 – Color Functions This is the last thing I wanted to point out as my final post in this series will be utilizing these functions in a more drawn out manner.  Both LESS and SASS provide functions for getting information from a color (R,G,B,H,S,L).  Using these, it is easy to define a primary color, and then darken or lighten it a little for your needs.  Example: Example LESS Code: @base-color: #111; @red:        #842210; #footer {   color: (@base-color + #003300);   border-left:  2px;   border-right: 2px;   border-color: desaturate(@red, 10%); } Example Compiled CSS: #footer {    color: #114411;    border-left:  2px;    border-right: 2px;    border-color: #7d2717; } I have found that these can be very useful and powerful when constructing a site theme. Conclusion I came across LESS and SASS when looking for the best way to implement some type of CSS variables for colors, because I hated having to do a Find and Replace in all of the files using the colors, and in some instances, you couldn’t just find/replace because of the color choices interfering with other colors (color to replace of #000, yet come colors existed like #0002bc).  So in many cases I would end up having to do a Find and manually check each one. In my next post, I am going to cover how I’ve come to set up these items and the structure for the items in the project, as well as the conventions that I have come to start using.  In the final post in the series, I will cover a neat little side project I built in LESS dealing with colors!

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  • Jumping around to work on different features when you get stuck, is it a source of project failures?

    - by codecompleting
    On personal projects (or work), if one gets stuck on a problem, or waiting to figure out a solution to the problem, if you jump to another section of your code, don't you think it will be a good reason your application will be buggy or worse yet never get completed? Assuming you are not using git and code each feature to a specific branch, things can get out of hand since you have 3 different features you are working on, and you have unresolved issues in each. So when you get done to work, you get stressed out because you have these hanging issues and half-baked code lingering about. What's the best way to avoid this problem? (if you have it) I'm guessing using something like git and creating a branch per feature is the safest way to avoid this bad habit. Any other suggestions?

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  • FTP Connection established...Connection timed out problem with all my sites and FTP programs?

    - by janoChen
    Just few hours ago FileZilla was working fine. Then, suddenly I started to get this error: Status: Resolving address of ftp.readtypechinese.com Status: Connecting to 69.175.14.60:21... Status: Connection established, waiting for welcome message... Error: Connection timed out Error: Could not connect to server And it happens with all my sites: Status: Resolving address of edasich.dreamhost.com Status: Connecting to 173.236.223.223:21... Status: Connection established, waiting for welcome message... Error: Connection timed out Error: Could not connect to server I'm using FileZilla 3.5.0 and Ubuntu 11.10. Any suggestions to fix this? (I already tried Passive mode and it doesn't work). EDIT: Ocasionally, the log goes beyond the ...waiting for welcome message: Status: Connection established, waiting for welcome message... Response: 220 DreamHost FTP Server Command: USER aleche23 Error: Connection timed out Error: Could not connect to server But the connection gets timed out again. Weird...I just realized that I have the same problems with other FTP programs too: gFTP: Looking up ftp.readtypechinese.com Trying readtypechinese.com:21 Connected to readtypechinese.com:21 220 ProFTPD 1.3.2 Server (server) [69.175.14.60] USER [email protected] Connection to ftp.readtypechinese.com timed out

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  • Have there been attempts to make object containers that search for valid programs by auto wiring compatible components?

    - by Aaron Anodide
    I hope this post isn't too "Fringe" - I'm sure someone will just kill it if it is :) Three things made me want to reach out about this now: Decoupling is so in the forefront of design. TDD inspires the idea that it doesn't matter how a program comes to exist as long as it works. Seeing how often the adapter pattern is applied to achieve (1). I'm almost sure this has been tried from a memory of reading about it around the year 2000 or so. If I had to guess, it was maybe about and earlier version of the Java Spring framework. At this time we were not so far from days when the belief was that computer programs could exhibit useful emergent behavior. I think the article said it didn't work, but it didn't say it was impossible. I wonder if since then it has been deemed impossible or simply an illusion due to a false assumption of similarity between a brain and a CPU. I know this illusion existed because I had an internship in 1996 where I programmed neural nets that were supposedly going to exhibit "brain damage". STILL, after all that, I'm sitting around this morning and not able to shake the idea that it should be possible to have a method of programming to allow autonomous components to find each other, attempt to collaborate and their outputs evaluated against a set desired results.

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  • How can I install iTunes in such a way that it can't put any "hooks" or helper programs on my computer?

    - by Joshua Carmody
    I'm buying a new iPad, which means I must once again install iTunes. I've not used iTunes in more than 6 months, since I bought a new computer. I don't like iTunes, but I can live with using it to buy/manage media and sync my Apple devices when the program is open. What I would like to do though, is find a way to install iTunes in such a way that it has absolutely no effect on my system when it is closed. iTunes normally installs several helper programs such as iTunesHelper.exe, and the Bonjour service. These programs run in the background when iTunes is closed. You can force-close them, or remove them from your setup files, but iTunes will often put them right back when you run it. I know these programs are mostly harmless, but they have at times caused issues such as iTunes spending system resources trying to catalog media files or drives connected to VPN, or other issues. At best they're just one more small background process eating up a small piece of my CPU time and RAM. How can I run iTunes without letting it get it's "hooks" into my system? One thought I had is that I could create a Windows user account just for iTunes, and deny it admin privileges. Then if I installed iTunes using that account maybe anything it installed wouldn't affect the "main" account on my PC? But I'm not sure if that would work.... Failing that, maybe some kind of virtualization software or sandbox I could install it in? I'm open to any suggestions. My system is an Intel-based PC running Windows 7 Professional 64-bit. Thanks!

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  • Is there any Flex dataGrid implementation which has features similar to XtraGrid?

    - by Nirmal Singh Raja Reegan
    I am looking for a Flex datagrid component that has features like grouping, sorting, master/detail display, etc. I am having an application in C# that uses XtraGrid suite to achieve the required datagrid features. I am planning to migrate this application to Flex. If there is no flex component readily available with XtraGrid features, then I have to create one on my own. Please let me know if you know any? Thanks, Nirmal

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  • Which new C#/VB features require .net Framework 4?

    - by Barry
    I remember reading in passing that some of the new language features in C# and VB that are available in VS2010 are backwards compatible with earlier versions of the framework, but that others are not. I'm pretty sure this was in reference to the new property syntax in VB. Which new features are language features vs which ones are framework specific?

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  • What features of interpreted languages can a compiled one not have?

    - by sub
    Interpreted languages are usually more high-level and therefore have features as dynamic typing (including creating new variables dynamically without declaration), the infamous eval and many many other features that make a programmer's life easier - but why can't compiled languages have these as well? I don't mean languages like Java that run on a VM, but those that compile to binary like C(++). I'm not going to make a list now but if you are going to ask which features I mean, please look into what PHP, Python, Ruby etc. have to offer. Which common features of interpreted languages can't/don't/do exist in compiled languages? Why?

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  • What all are the New features in asp.net 4.0. ? [closed]

    - by HotTester
    Possible Duplicate: What will be the new features available in ASP.Net 4.0? What all are the New features in asp.net 4.0.? Currently our team is doing project on .net 2.0 and we didn't go for an upgrade on asp.net 3.5. Now we are preparing to switch from asp.net 2.0 to asp.net 4.0. A list of such features would help us in designing the training program.

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  • How to access files on another local Windows 7 computer without using any native Windows features?

    - by user1356682
    I do not want to use any native Windows features, services, nor anything do to this. It needs to be a standalone program, with ZERO Windows dependencies. Just like TeamViewer does not use any native Windows features, so I want to be able to access files and folders in a standalone program. No remote desktop No VNC type programs No Windows File Sharing No Shared Folders in Windows No internet connection required It needs ability to view, edit, transfer files at normal network rates.

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