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  • In setting up dual Boot with Windows XP and Ubuntu, which OS do I install first?

    - by markl
    I'd like to install both Ubuntu 12.04 and Windows XP on a Dell laptop, and I was thinking about using a dual boot structure, and using the bulk of my hard drive as empty hard drive space to share files between the two operating systems (so choice of file system type is very important in this set-up). The kind of partitioning structure I would like to use is Partition 1 - Ubuntu 12.04 (root) (20GB) Partition 2 - Ubuntu /home (20GB) Partition 3 : Free Space (560GB) Partition 4 : Windows XP (35GB) Partition 5 : SWAP (3GB) (Total Hardrive Capacity is ~640GB) My question is; what is the best way to go about setting up this kind this system? Should I install Windows XP first and setup the partitions, and then install Ubuntu which I believe will install the GRUB bootloader for OS booting choice or Do I install Ubuntu first, setting up the available partitions and then perform a WIndows install? Please let me know if there is anything in this setup that I have left out and should know about, including things related to setting particular partitions as logical or primary, and whether the boot partition and the filesystem partition should actually be two separate partitions.

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  • LINQ – SequenceEqual() method

    - by nmarun
    I have been looking at LINQ extension methods and have blogged about what I learned from them in my blog space. Next in line is the SequenceEqual() method. Here’s the description about this method: “Determines whether two sequences are equal by comparing the elements by using the default equality comparer for their type.” Let’s play with some code: 1: int[] numbers = { 5, 4, 1, 3, 9, 8, 6, 7, 2, 0 }; 2: // int[] numbersCopy = numbers; 3: int[] numbersCopy = { 5, 4, 1, 3, 9, 8, 6, 7, 2, 0 }; 4:  5: Console.WriteLine(numbers.SequenceEqual(numbersCopy)); This gives an output of ‘True’ – basically compares each of the elements in the two arrays and returns true in this case. The result is same even if you uncomment line 2 and comment line 3 (I didn’t need to say that now did I?). So then what happens for custom types? For this, I created a Product class with the following definition: 1: class Product 2: { 3: public int ProductId { get; set; } 4: public string Name { get; set; } 5: public string Category { get; set; } 6: public DateTime MfgDate { get; set; } 7: public Status Status { get; set; } 8: } 9:  10: public enum Status 11: { 12: Active = 1, 13: InActive = 2, 14: OffShelf = 3, 15: } In my calling code, I’m just adding a few product items: 1: private static List<Product> GetProducts() 2: { 3: return new List<Product> 4: { 5: new Product 6: { 7: ProductId = 1, 8: Name = "Laptop", 9: Category = "Computer", 10: MfgDate = new DateTime(2003, 4, 3), 11: Status = Status.Active, 12: }, 13: new Product 14: { 15: ProductId = 2, 16: Name = "Compact Disc", 17: Category = "Water Sport", 18: MfgDate = new DateTime(2009, 12, 3), 19: Status = Status.InActive, 20: }, 21: new Product 22: { 23: ProductId = 3, 24: Name = "Floppy", 25: Category = "Computer", 26: MfgDate = new DateTime(1993, 3, 7), 27: Status = Status.OffShelf, 28: }, 29: }; 30: } Now for the actual check: 1: List<Product> products1 = GetProducts(); 2: List<Product> products2 = GetProducts(); 3:  4: Console.WriteLine(products1.SequenceEqual(products2)); This one returns ‘False’ and the reason is simple – this one checks for reference equality and the products in the both the lists get different ‘memory addresses’ (sounds like I’m talking in ‘C’). In order to modify this behavior and return a ‘True’ result, we need to modify the Product class as follows: 1: class Product : IEquatable<Product> 2: { 3: public int ProductId { get; set; } 4: public string Name { get; set; } 5: public string Category { get; set; } 6: public DateTime MfgDate { get; set; } 7: public Status Status { get; set; } 8:  9: public override bool Equals(object obj) 10: { 11: return Equals(obj as Product); 12: } 13:  14: public bool Equals(Product other) 15: { 16: //Check whether the compared object is null. 17: if (ReferenceEquals(other, null)) return false; 18:  19: //Check whether the compared object references the same data. 20: if (ReferenceEquals(this, other)) return true; 21:  22: //Check whether the products' properties are equal. 23: return ProductId.Equals(other.ProductId) 24: && Name.Equals(other.Name) 25: && Category.Equals(other.Category) 26: && MfgDate.Equals(other.MfgDate) 27: && Status.Equals(other.Status); 28: } 29:  30: // If Equals() returns true for a pair of objects 31: // then GetHashCode() must return the same value for these objects. 32: // read why in the following articles: 33: // http://geekswithblogs.net/akraus1/archive/2010/02/28/138234.aspx 34: // http://stackoverflow.com/questions/371328/why-is-it-important-to-override-gethashcode-when-equals-method-is-overriden-in-c 35: public override int GetHashCode() 36: { 37: //Get hash code for the ProductId field. 38: int hashProductId = ProductId.GetHashCode(); 39:  40: //Get hash code for the Name field if it is not null. 41: int hashName = Name == null ? 0 : Name.GetHashCode(); 42:  43: //Get hash code for the ProductId field. 44: int hashCategory = Category.GetHashCode(); 45:  46: //Get hash code for the ProductId field. 47: int hashMfgDate = MfgDate.GetHashCode(); 48:  49: //Get hash code for the ProductId field. 50: int hashStatus = Status.GetHashCode(); 51: //Calculate the hash code for the product. 52: return hashProductId ^ hashName ^ hashCategory & hashMfgDate & hashStatus; 53: } 54:  55: public static bool operator ==(Product a, Product b) 56: { 57: // Enable a == b for null references to return the right value 58: if (ReferenceEquals(a, b)) 59: { 60: return true; 61: } 62: // If one is null and the other not. Remember a==null will lead to Stackoverflow! 63: if (ReferenceEquals(a, null)) 64: { 65: return false; 66: } 67: return a.Equals((object)b); 68: } 69:  70: public static bool operator !=(Product a, Product b) 71: { 72: return !(a == b); 73: } 74: } Now THAT kinda looks overwhelming. But lets take one simple step at a time. Ok first thing you’ve noticed is that the class implements IEquatable<Product> interface – the key step towards achieving our goal. This interface provides us with an ‘Equals’ method to perform the test for equality with another Product object, in this case. This method is called in the following situations: when you do a ProductInstance.Equals(AnotherProductInstance) and when you perform actions like Contains<T>, IndexOf() or Remove() on your collection Coming to the Equals method defined line 14 onwards. The two ‘if’ blocks check for null and referential equality using the ReferenceEquals() method defined in the Object class. Line 23 is where I’m doing the actual check on the properties of the Product instances. This is what returns the ‘True’ for us when we run the application. I have also overridden the Object.Equals() method which calls the Equals() method of the interface. One thing to remember is that anytime you override the Equals() method, its’ a good practice to override the GetHashCode() method and overload the ‘==’ and the ‘!=’ operators. For detailed information on this, please read this and this. Since we’ve overloaded the operators as well, we get ‘True’ when we do actions like: 1: Console.WriteLine(products1.Contains(products2[0])); 2: Console.WriteLine(products1[0] == products2[0]); This completes the full circle on the SequenceEqual() method. See the code used in the article here.

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  • Online Syntax Colorizer

    - by lavanyadeepak
    Online Syntax Colorizer For those of us who share code snippets along with articles the most daunting problem would be to preserve the syntax colorizations. There are a few ways to manage through this additional requirements: Tweak and point the color picker in the article textearea. Import the code to a word processor and then copy the code. However, the word processor would unnecessarily swell the contents with too much of formatting contents. Quick Online Colorizer: http://tohtml.com/ (This supports a lot of languages including autodetection). I would also recommend if GWB could link to this website and auto-colorize the code when we paste it in our articles.

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  • Are generic keywords in url bad for SEO? [closed]

    - by user1661479
    Possible Duplicate: Squeezing all the SEO out of a URL as possible Need help with url structure. Let's say I'm a manufacturer of Wire EDM machines. Is it bad for me to put the keywords wire-edm in my url to help try to raise SEO ranking? For example: mywebsite.com/wire-edm/machine/model-xxxx mywebsite.com/wire-edm/customer-service mywebsite.com/wire-edm/contact Or should I leave it as the following because the gains are fairly insignificant and it doesn't help users understand my site structure: mywebsite.com/machine/model-xxxx mywebsite.com/customer-service mywebsite.com/contact I’d like to hear what everyones thoughts are on this and please provide some sources for which method is better.

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  • Google I/O 2010 Keynote, pt. 11

    Google I/O 2010 Keynote, pt. 11 Video footage from Day 1 keynote at Google I/O 2010 For Google I/O session videos, presentations, developer interviews and more, go to: code.google.com/io From: GoogleDevelopers Views: 2 0 ratings Time: 09:59 More in Science & Technology

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  • The Ashpocalypse

    Melange is the open source web app that runs Google Summer of Code ™ each year. It is being developed and maintained by a volunteer team of student...

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  • Google I/O 2010 Keynote, pt. 10

    Google I/O 2010 Keynote, pt. 10 Video footage from Day 1 keynote at Google I/O 2010 For Google I/O session videos, presentations, developer interviews and more, go to: code.google.com/io From: GoogleDevelopers Views: 1 0 ratings Time: 09:50 More in Science & Technology

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  • Google I/O 2010 Keynote, pt. 2

    Google I/O 2010 Keynote, pt. 2 Video footage from Day 1 keynote at Google I/O 2010 For Google I/O session videos, presentations, developer interviews and more, go to: code.google.com/io From: GoogleDevelopers Views: 4 0 ratings Time: 09:57 More in Science & Technology

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  • How do I correctly multiply an XMMATRIX by a scalar?

    - by user43129
    Using DirectXMath and its XMMATRIX structure in C++ and Direct X 11, how does one multiply that matrix structure by a single float scalar? I want to implement the operation B = A * f; where A and B are XMMATRIX and f is a float. I found all sorts of functions to multiply a matrix by another matrix or a vector. I found all sorts of functions to construct matrices. I could find no scalar multiplication! Why is there no such function? Is there no use case? Did I miss something? How do I implement scalar multiplication?

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  • Importing Data From Excel Using SSIS - Part 1

    Recently while working on a project to import data from an Excel worksheet using SSIS, I realized that sometimes the SSIS Package failed even though when there were no changes in the structure/schema of the Excel worksheet. I investigated it and I noticed that the SSIS Package succeeded for some set of files, but for others it failed. I found that the structure/schema of the worksheet from both these sets of Excel files were the same, the data was the only difference. How come just changing the data can make an SSIS Package fail? What actually causes this failure? What can we do to fix it?

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  • What is the best taxonomy from Google's perspective?

    - by ZakGottlieb
    I was wondering what the best way is to structure a new website in Google's eyes. Currently, it contains two top-level categories (X & Y), and clicking a term under either one will result in the URL: www.nameofsite.com/X/X type term, or /Y/Y type term Technically, it is correct to group all "X type terms" under X and "Y type terms" under Y, but we could probably be more granular and break all articles into 5-6 top-level categories by breaking Y up into more specific categories. Given that the current URL structure will eventually result in 1000's of "X type terms" and "Y type terms" under just two top-level categories, would it be more advisable to have several of these, as suggested? Thank you in advance.

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  • Google I/O Sandbox Case Study: Storify

    Google I/O Sandbox Case Study: Storify We interviewed Storify in the Google I/O Sandbox on May 10th, 2011 and they explained to us the benefits of integrating their product with YouTube. Storify is a platform that enables users to build stories from the news that gets published on social media and on YouTube. To learn more about YouTube Developers, visit: code.google.com To learn more about Storify, visit: www.storify.com From: GoogleDevelopers Views: 326 15 ratings Time: 01:59 More in Science & Technology

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  • Consuming OData based Rest service in C# [en-US]

    - by ruimachado
    Nowadays comunication between applications is an active topic with daily usage and a large amount of pratical appliances. While developing an app in witch I had to consume an OData I found out that combining Linq with my code made this operation pretty easy.The algorithm to consume OData starts with adding a service reference to Visual Studio:After adding the service reference in wich you define the uri to the service, we start building our code.In your code the algorithm is the following:Define the Uri to your OData ServiceDefine the context of your odata, wich contains all entities exposed by the service.Query the context using LinqPrint the resultEasy and simple.Example code:01public static void Main(string[] args){02 03        Uri serviceUri= newUri("http://example.host.odataservice.net/service.svc", UriKind.Absolute);04        ODataService.ServiceEntities context = newODataService.ServiceEntities (serviceUri);05 06        context.Credentials = newSystem.Net.NetworkCredential(Username,Password);07 08         var query = from ServiceObject in context.YourEntity09                     select ServiceObject ;10 11        foreach (var myObject in query)12        {13            Console.WriteLine("\n Field1: {0} | Field2: {1}",14            myObject .Field1, myObject .Field2);15 16        }17}That’s it.Thank you,Rui Machadorpmachado.wordpress.com

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  • redimension multidimensional arrays in Excel VBA [migrated]

    - by user147178
    Take a look at the following code. What my problem is is that I can't figure out how to redimension the n integer and the b integer. What I'm doing is the array sent1 is already working and it is populated with about 4 sentences. I need to go through each sentence and work on it but I'm having trouble. dim sent1() dim sent2() dim n as integer, b as integer, x as integer dim temp_sent as string b = 0 For n = 1 to ubound(sent1) temp_sent = sent1(n) for x = 1 to len(temp_sent1) code if a then b = b + 1 THIS IS THE PART OF THE CODE THAT IS NOT WORKING redim preserve sent2(1 to ubound(sent1), b) sent2(n,b) = [code] next next

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  • Google I/O 2010 Keynote, pt. 6

    Google I/O 2010 Keynote, pt. 6 Video footage from Day 1 keynote at Google I/O 2010 For Google I/O session videos, presentations, developer interviews and more, go to: code.google.com/io From: GoogleDevelopers Views: 49 0 ratings Time: 10:01 More in Science & Technology

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  • Is C# becoming harder to read? [closed]

    - by Avi
    As C# has progressed, many language features have been added. It has come to the point where it's becoming unreadable for me. As an example, consider the following code snip from Caliburn.Micro code here: container = CompositionHost.Initialize( new AggregateCatalog( AssemblySource.Instance. Select(x => new AssemblyCatalog(x)) .OfType<ComposablePartCatalog>() ) ); Now, this is just a small example. I have a number of questions: Is this a common or known problem? Is the C# community finding the same? Is this an issue with the language, or is it the style used by the developer? Are there any simple solutions to better understand others code and avoid writing code in this way?

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