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• Perl date function/module able to understand full unabbreviated months.

  - by s2cuts

  Let's say I read in a string from somewhere that contains a date, and it's date format doesn't abbreviate the month. Is there a module that can handle reading it in, and then outputting it to whichever format I choose? I've taken a quick look through CPAN, and every date module I looked at didn't seem to accommodate an unabbreviated month. Thanks for any help EDIT: As an example, say we have a string like this; "2 February 1988". Now we want to convert it into "1988-02-02" (YYYY-MM-DD).

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• A generic list of generics

  - by SnOrfus

  I'm trying to store a list of generic objects in a generic list, but I'm having difficulty declaring it. My object looks like: public class Field<T> { public string Name { get; set; } public string Description { get; set; } public T Value { get; set; } /* ... */ } I'd like to create a list of these. My problem is that each object in the list can have a separate type, so that the populated list could contain something like this: { Field<DateTime>, Field<int>, Field<double>, Field<DateTime> } So how do I declare that? List<Field<?>> (I'd like to stay as typesafe as possible, so I don't want to use an ArrayList).

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• What's the simplest way of defining lexicographic comparison for elements of a class?

  - by the_mandrill

  If I have a class that I want to be able to sort (ie support a less-than concept), and it has several data items such that I need to do lexicographic ordering then I need something like this: struct MyData { string surname; string forename; bool operator<(const MyData& other) const { return surname < other.surname || (surname==other.surname && forename < other.forename); } }; This becomes pretty unmanageable for anything with more than 2 data members. Are there any simpler ways of achieving it? The data members may be any Comparable class.

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• is the + in += on a Map a prefix operator of =?

  - by Steve

  In the book "Programming in Scala" from Martin Odersky there is a simple example in the first chapter: var capital = Map("US" -> "Washington", "France" -> "Paris") capital += ("Japan" -> "Tokyo") The second line can also be written as capital = capital + ("Japan" -> "Tokyo") I am curious about the += notation. In the class Map, I didn't found a += method. I was able to the same behaviour in an own example like class Foo() { def +(value:String) = { println(value) this } } object Main { def main(args: Array[String]) = { var foo = new Foo() foo = foo + "bar" foo += "bar" } } I am questioning myself, why the += notation is possible. It doesn't work if the method in the class Foo is called test for example. This lead me to the prefix notation. Is the + a prefix notation for the assignment sign (=)? Can somebody explain this behaviour?

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• C# equivalent of recv?

  - by mlh

  Hello, I have a portion of C code that I am trying to port over to C#. In my C code, I create a socket and then issue a receive command. The receive command is void receive(mysocket, char * command_buffer) { recv(mysocket, command_buffer, COMMAND_BUFFER_SIZE, 0); } now, the command buffer is returned with new values including command_buffer[8] being a pointer to a string. I'm really confused as to how to do this in C# because C# Read() command specifically takes in bytes and not char. The important part is that I get the pointer to the string. Any ideas?

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• Strange iterator's behaviour;

  - by A-ha

  #include "stdafx.h" int _tmain(int argc, _TCHAR* argv[]) { string s = "Haven't got an idea why."; auto beg = s.begin(); auto end = s.end(); while (beg < end) { cout << *beg << '\n'; if (*beg == 'a') {//whithout if construct it works perfectly beg = s.erase(beg); } ++beg; } return 0; } Why if I erase one or more chars from this string this code breaks? I suppose it has something to do with returned iterator after erase operation being created at higher address than end iterator but I'm not sure and it surely isn't right behaviour. Or is it?

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• 'Random' Orderby in webservice using LINQ To Entities

  - by MrDean

  Morning all Now I know there is a reason to this odering but my tiny little brain can't get my head around it. I am using a webservice to pull through data to a webp[age and have the following that is so far pulling data through from UUF1: public string[] GetBuyer(string Memberkey) { try { WebService.EntitiesConnection buyer = new WebService.EntitiesConnection(); return buyer.tblProducts .Where(p => p.MemberId == Memberkey) .OrderBy(p => p.UnitUserfield1) .Select(p => p.UnitUserfield1) .Distinct() .ToArray(); } catch (Exception) { return null; } } This works fine and pulls the data through but in a strange order. Where I would expect results of A B C D E F, it appears to be returning A C E B D F. Could someone point out the error in my ways please?

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• Why isn't the new() generic constraint satisfied by a class with optional parameters in the construc

  - by Joshua Flanagan

  The following code fails to compile, producing a "Widget must be a non-abstract type with a public parameterless constructor" error. I would think that the compiler has all of the information it needs. Is this a bug? An oversight? Or is there some scenario where this would not be valid? public class Factory<T> where T : new() { public T Build() { return new T(); } } public class Widget { public Widget(string name = "foo") { Name = name; } public string Name { get; set; } } public class Program { public static void Main() { var widget = new Widget(); // this is valid var factory = new Factory<Widget>(); // compiler error } }

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• How to add up amount of data from an external file in C# (Stream Reader)

  - by user2985995

  I'm new to this site, and pretty new to programming, at the moment I'm trying to display a count amount for the users names on my donation list, and then I also want to have a sum to work out the total amount of money the donation list contains, If someone could help me with creating a way to add up amount of donors on the donations.txt file that would be great help, I have no idea where to start, but so far this is my coding: string sName; double dAmount; string sTotalNames; double dAmountTotal; double dAmountAverage; using (StreamReader sr = new StreamReader("Donations.txt")) { while (sr.Peek() != -1) { sName = sr.ReadLine(); Console.WriteLine(sName); dAmount = Convert.ToDouble(sr.ReadLine()); Console.WriteLine(dAmount); } Console.WriteLine("Press any key to close"); Console.ReadKey(); }

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• How can i print a javascript object ?

  - by maxjackie

  i want print the content of a javascript object in a string format like when we alert a variable in javascript same way i want print the object in formatted way

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• Setting the size of a silverlight window at runtime automatically?

  - by dilbert789

  I need to be able to change the size of my Silverlight object at run time because I have content that changes in size dramatically between pages, and I'd rather not show a Silverlight scroll bar inside the browser scroll bar. I was able to do the following to get it to work: In the aspx page hosting the silverlight control: - Set your Div to the starting size you need it to be - Set the Silverlight Obejct to width=”100%” height=”100%” In your Main page add this: public static void ChangeSize(string height) { var myDiv = HtmlPage.Plugin.Parent; while (myDiv.TagName != "div") myDiv = myDiv.Parent; myDiv.SetStyleAttribute("height", height); } Anywhere you want to now change the size of the page do this: string newHeight = (App.Current.Host.Content.ActualHeight + 75).ToString(); MainPage.ChangeSize(newHeight + "px"); //App.Current.Host.Content.ActualHeight will get the current actual height of the object Is there a way that I can set this to re-size automatically so that I do not have to specify the amount to change? Currently using SL 2, interested in if there is another way in a different version though.

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• How to identify each parameter type in a C# method?

  - by user465876

  I have a C# method say: MyMethod(int num, string name, Color color, MyComplexType complex) Using reflection, how can I distinctly identify each of the parameter types of any method? I want to perform some task by parameter type. If the type is simple int, string or boolean then I do something, if it is Color, XMLDocument, etc I do something else and if it is user defined type like MyComplexType or MyCalci etc then I want to do certain task. I am able to retrieve all the parameters of a method using ParameterInfo and can loop through each parameter and get their types. But how can I identify each data type? foreach (var parameter in parameters) { //identify primitive types?? //identify value types //identify reference types } Edit: this is apart of my code to create a propert grid sort of page where I want to show the parameter list with data types for the selected method. If the parameter has any userdefined type/reference type then I want to expand it further to show all the elements under it with datatypes.

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• Java Map question

  - by user552961

  I have one Map that contains some names and numbers Map<String,Integer> abc = new TreeMap<String,Integer>(); It works fine. I can put some values in it but when I call it in different class it gives me wrong order. For example: I putted abc.put("a",1); abc.put("b",5); abc.put("c",3); some time it returns the order (b,a,c) and some time (a,c,b). What is wrong with it? Is there any step that I am missing when I call this map?

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• Obtaining Android Public Map API Key

  - by TheHighLifeSon

  I have been trying to obtain a public map api key for my Android app. However the public key that I receive from Google does not work. I have been using the following steps: Obtaining Release Public Map API Key 1.Obtain Private Key: Use Export of Eclipse to sign release application and create new keystore 2.Obtain MD5 certificate: using alias and keystore set up use keytool in Java directory: keytool -list -alias poly_alias -keystore copy MD5 certificate 3.Obtain API Map Key: Visit http://code.google.com/android/maps-api-signup.html and enter MD5 certificate copy key 4.Use New Map API Key: insert new map key for string in strings.xml for string mapApiKey Does anyone have any suggestions on what I am doing wrong?

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• Anyone saw a worst written function than this? [closed]

  - by fvoncina

  string sUrl = "http://www.ipinfodb.com/ip_query.php?ip=" + ip + "&output=xml"; StringBuilder oBuilder = new StringBuilder(); StringWriter oStringWriter = new StringWriter(oBuilder); XmlTextReader oXmlReader = new XmlTextReader(sUrl); XmlTextWriter oXmlWriter = new XmlTextWriter(oStringWriter); while (oXmlReader.Read()) { oXmlWriter.WriteNode(oXmlReader, true); } oXmlReader.Close(); oXmlWriter.Close(); // richTextBox1.Text = oBuilder.ToString(); XmlDocument doc = new XmlDocument(); doc.LoadXml(oBuilder.ToString()); doc.Save(System.Web.HttpContext.Current.Server.MapPath(".") + "data.xml"); DataSet ds = new DataSet(); ds.ReadXml(System.Web.HttpContext.Current.Server.MapPath(".") + "data.xml"); string strcountry = "India"; if (ds.Tables[0].Rows.Count > 0) { strcountry = ds.Tables[0].Rows[0]["CountryName"].ToString(); }

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• In JPA, a Map of embeddable values, that have an embedded entity used as the key

  - by Schmuli

  I'm still new to JPA (and Hibernate, which I'm using as my provider), so maybe this just can't be done, but anyway... Consider the following code: @Entity class Root { @Id private long id; private String name; @ElementCollection private Map<ResourceType, Resource> resources; ... } @Entity class ResourceType { @Id private long id; private String name; } @Embeddable class Resource { private ResourceType resourceType; private long value; } In the database, there is a collection table, 'Root_resources', that stores the values of the map, but the resource type appears twice (actually, the resource type ID does), once as the KEY of the map, and once as part of the value. Is there a way, similar to, say, the @MapKey annotation, to indicate that the key is one of the columns of the value (i.e. embedded)?

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• (Action<T>).Name does not return expected values

  - by Tomas Lycken

  I have the following method (used to generate friendly error messages in unit tests): protected string MethodName<TTestedType>(Action<TTestedType> call) { return string.Format("{0}.{1}", typeof(TTestedType).FullName, call.Method.Name); } But when I call it as follows, I don't get the expected results: var nm = MethodName<MyController>(ctrl => ctrl.Create()); After running this code, nm contains "<Create_CreateShowsView>b__8", and not (as expected) "Create". How should I change the code to obtain the expected result?

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• XmlResolver Class' GetEntity function

  - by Pok

  I wrote a custom resolver class. It works OK for resolving SYSTEM DTDs, but not for resolving PUBLIC DTDs. When the class has to resolve PUBLIC DTDs instead of the URI of the resource, the function receives the public identifier through the absoluteUri parameter of the GetEntity function. Is there a solution to this. In examples: if I have a DTD declaration like <!DOCTYPE document SYSTEM "document.dtd"> then the custom resolver correctly receives the string "document.dtd" through the absoluteUri parameter of the GetEntity function. if I have a DTD declaration like <!DOCTYPE document PUBLIC "-//Organization//DTD Document 1.0//EN" "http://localhost/document.dtd"> then the custom resolver incorrectly receives the string "-//Organization//DTD Document 1.0//EN" instead of "scheme://host/document.dtd".

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• [C# n MySQL] Creating a database using Connector/NET Programming?

  - by yeeen

  How to create a database using connector/net programming? How come the following doesn't work? string connStr = "server=localhost;user=root;port=3306;password=mysql;"; MySqlConnection conn = new MySqlConnection(connStr); MySqlCommand cmd; string s0; try { conn.Open(); s0 = "CREATE DATABASE IF NOT EXISTS `hello`;"; cmd = new MySqlCommand(s0, conn); conn.Close(); } catch (Exception e) { Console.WriteLine(e.ToString()); }

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• python and regular expression with unicode

  - by bsn

  I need to delete some unicode symbols from the string '?????? ??????? ???????????? ??????????' I know they exist here for sure. I try: re.sub('([\u064B-\u0652\u06D4\u0670\u0674\u06D5-\u06ED]+)', '', '?????? ??????? ???????????? ??????????') but it doesn't work. String stays the same. ant suggestion what i do wrong?

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• UnknownHostException in java (that too only sometimes)

  - by Nitesh Panchal

  Hello, I am trying to read rss feed of Yahoo but i am unable to make it work properly. The code is absolutely correct , i am sure about it. It works sometimes but sometimes i get UnknownHostException. What can be the reason? Is there some problem with my internet or something else? This is my code :- public List<RssFeed> getRssFeed() { try { List<RssFeed> objList = new ArrayList<RssFeed>(); DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); DocumentBuilder db = dbf.newDocumentBuilder(); Document doc = db.parse("http://rss.news.yahoo.com/rss/india"); //doc.getDocumentElement().normalize(); Element docElement = doc.getDocumentElement(); NodeList objChannelList = docElement.getChildNodes(); for (int intIndex = 0; intIndex < objChannelList.getLength(); intIndex++) { if (objChannelList.item(intIndex).getNodeType() == Node.ELEMENT_NODE) { Element elemItem = (Element) objChannelList.item(intIndex); NodeList itemList = elemItem.getElementsByTagName("item"); //show only 3 news int count = itemList.getLength() > 3 ? 3 : objChannelList.getLength(); for (int intSubIndex = 0; intSubIndex < count; intSubIndex++) { NodeList itemDetailList = itemList.item(intSubIndex).getChildNodes(); String strTitle = ((Node) itemDetailList.item(RSS_VALUES.TITLE.getValue())).getFirstChild().getNodeValue(); String strdescription = ((Node) itemDetailList.item(RSS_VALUES.DESCRIPTION.getValue())).getFirstChild().getNodeValue(); String strLink = ((Node) itemDetailList.item(RSS_VALUES.LINK.getValue())).getFirstChild().getNodeValue(); //System.out.println(strTitle + "\n" + strdescription + "\n" + strLink + "\n\n\n\n"); objList.add(new RssFeed(strTitle, strdescription, strLink)); } } } return objList; } catch (SAXException ex) { Logger.getLogger(Utils.class.getName()).log(Level.SEVERE, null, ex); } catch (IOException ex) { Logger.getLogger(Utils.class.getName()).log(Level.SEVERE, null, ex); } catch (ParserConfigurationException ex) { Logger.getLogger(Utils.class.getName()).log(Level.SEVERE, null, ex); } return null; } Thanks in advance :). This problem has been bugging me since 1 month. Don't know why does Java in this case behave as per its mood :(

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• Upon USB insert, record unique identifer sting, format drive to FAT32 and copy a file. Bash or Pytho

  - by samsixty

  Hello, This is what I want to do, insert USB flash drive. mount it. record uniquie identifer string to a file. format the drive to FAT32. copy a text file to the drive. unmount it. remove the drive. 30 times The situation is this, I have bought 30 usb drives. I need to format each one to ensure they are clean, I need the unique string from each device. I need to put the same txt file on each one. I am not great at writing scripts but can read and follow bash and python. Any pointers would be appreciated.

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• out-of-the-box way to get an idmap from hibernate for a given entity?

  - by Geert-Jan

  Over and over again I notive myself getting a list from hibernate, and the first thing next is put it in an idmap like: List<House> entities = s.createCriteria(House.class).list(); Map<String,House> entitymap = new HashMap<String,House>(); for(TA_entity e:entities){ entitymap.put(e.getId(), e); } Is there a way to get this directly out of hibenerate? afterall Hibernate is familiar with the id.

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• [iphone] use NSString in other method?!

  - by user134282

  It's really embarrassing but i stuck on it for two hours of trial and error. I declared an NSString in the interface as: NSString *testString; Then i made a property and synthesized it. I allocate it in viewDidLoad with: testString = [[NSString alloc] initWithFormat:@"thats my value: %i", row]; If i want to get the value of the string in another method it always return (null). So the string is empty, but why? how do i make it accessible for every function inside of one class? So i don't want to make a global var just a "global variable inside the class" It's really confusing because as long as i code i never ran into this problem :( thanks a lot for helping me!

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• how to compress a PNG image using Java

  - by 116213060698242344024

  Hi I would like to know if there is any way in Java to reduce the size of an image (use any kind of compression) that was loaded as a BufferedImage and is going to be saved as an PNG. Maybe some sort of png imagewriteparam? I didnt find anything helpful so im stuck. heres a sample how the image is loaded and saved public static BufferedImage load(String imageUrl) { Image image = new ImageIcon(imageUrl).getImage(); bufferedImage = new BufferedImage(image.getWidth(null), image.getHeight(null), BufferedImage.TYPE_INT_ARGB); Graphics2D g2D = bufferedImage.createGraphics(); g2D.drawImage(image, 0, 0, null); return bufferedImage; } public static void storeImageAsPng(BufferedImage image, String imageUrl) throws IOException { ImageIO.write(image, "png", new File(imageUrl)); }

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