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• Python: Give a class its own `self` at instantiation time

  - by SuperDisk

  I've got a button class that you can instantiate like so: engine.createElement((0, 0), Button(code=print, args=("Stuff!",))) And when it is clicked it will print "Stuff!". However, I need the button to destroy itself whenever it is clicked. Something like this: engine.createElement((0, 0), Button(code=engine.killElement, args=(self,))) However, that would just kill the caller, because self refers to the caller at that moment. What I need to do is give the class its own 'self' in advance... I thought of just making the string 'self' refer to the self variable upon click, but what if I wanted to use the string 'self' in the arguments? What is the way to do this? Is my architecture all wrong or something? Thanks.

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• Do I have to hash twice in C#?

  - by Joe H

  I have code like the following: class MyClass { string Name; int NewInfo; } List<MyClass> newInfo = .... // initialize list with some values Dictionary<string, int> myDict = .... // initialize dictionary with some values foreach(var item in newInfo) { if(myDict.ContainsKey(item.Name)) // 'A' I hash the first time here myDict[item.Name] += item.NewInfo // 'B' I hash the second (and third?) time here else myDict.Add(item.Name, item.NewInfo); } Is there any way to avoid doing two lookups in the Dictionary -- the first time to see if contains an entry, and the second time to update the value? There may even be two hash lookups on line 'B' -- one to get the int value and another to update it.

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• Passing Values from a View to itself with parameters getting null values ?

  - by vsj

  Hi all, I am trying to get values from a view which i have the code below and I am taking the start date value from the view input text box and posting it back but I am still getting null except for the apikey and userkey.Here are the two views.. public ActionResult View1(string apiKey, string userId) { StartGoalViewModel vm = new StartGoalViewModel(); vm.ApiKey = apiKey; vm.UserId = userId; vm.GoalTypeId =1; vm.StartDate = null; return View(vm); } VIEW1.ASPX <% Html.BeginForm(); %> <%= Html.TextBox("name", Model.StartDate) %> <input type="submit" value="Start" /> <% Html.EndForm(); %> [HttpPost] public ActionResult VIEW1 (StartGoalViewModel fm) { // I get StartDate null... }

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• error in python d not defined.

  - by dtechie

  Hi I am learning python and have this error . I can figure out where\what the error is in the code. File "<string>", line 1, in <module>. Name = "" Desc = "" Gender = "" Race = "" # Prompt user for user-defined information Name = input('What is your Name? ') Desc = input('Describe yourself: ') When i run the program it outputs What is your Name? (i input d ) this gives the error Traceback (most recent call last): File "/python/chargen.py", line 19, in <module> Name = input('What is your Name? ') File "<string>", line 1, in <module> NameError: name 'd' is not defined This is an example code from Python 3 for Absolute Beginners Thank you for your help :)

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• how to create 2 controllers with same actionresult 2 views but one implementation

  - by amalatsliit

  I got a controller in my mvc application like below. public class BaseController: Controller { protected void LogInfo() { logger.InfoFormat("[SessionID: {0}, RemoteIP: {1}]", Session.SessionID, Request.UserHostAddress); } } public class FirstController : BaseController { public ActionResult Index(string name) { LogInfo(); getQueryString(); if(IsValidRec()) { if(Errors())) { return View("Error"); } var viewname = getViewName(name); return view(viewname); } else return view("NotFound"); } } I need to create another controller(SecondController ) with same ActionResult method that FirstController has but without any implementation. Because I dont wont to repeat same code in 2 ActionResult methods. what is the best way to do that. I tried in following way but I m getting error when I initialize my protected method 'LogInfo()' public class SecondController : BaseController { public ActionResult Index(string name) { var firstcontroller = new FirstController(); return firstcontroller.Index(name); } }

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• How can I get running totals of integer values from a SortedDictionary?

  - by user578083

  SortedDictionary<int, string> typeDictionary = new SortedDictionary<int, string>(); SortedDictionary<int, int> lengthDictionary = new SortedDictionary<int, int>(); lengthDictionary has values in key value pair as follows: <1,20> <2,8> <3,10> <4,5> i want LINQ query which will return me new list like as follows <1,20> <2,20+8=28> // 20 from key 1 <3,28+10=38> // 28 from key 2 <4,38+5=43> // 38 from key 3 Result should like this: <1,20> <2,28> <3,38> <4,43>

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• Unable to bind in asp.net grid Template Column

  - by OneSmartGuy

  I am having trouble accessing the data field. I receive the error: Databinding methods such as Eval(), XPath(), and Bind() can only be used in the context of a databound control. I can get the value but using <%# getOpenJobs((string)Eval("ParentPart")) % but I need to use it in the if to display a certian picture if it passes the condition. Is there a better way to do this or am i just missing something simple? <telerik:GridTemplateColumn UniqueName="hasOpenJobs" HeaderText=""> <ItemTemplate> <% if (getOpenJobs((string)Eval("ParentPart")) > 1) { %> <img src="../images/job-icon.gif" alt="Open Jobs" /> <%} %> </ItemTemplate> </telerik:GridTemplateColumn>

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• Is there a way to make this C# method shorter and more readable with the help of Linq?

  - by Hamish Grubijan

  The following works, but I figured - since it is all based on IEnumerable, Linq can come handy here is well. By the way, is there an equivalent to Directory.GetFiles() which would return an IEnumerable instead of the array? If it exists, then would it make the code run any faster? The last part of the question is inspired by Python language which favors lightweight generators over concrete lists. private IEnumerable<string> getFiles(string strDirectory, bool bCompressedOnly) { foreach (var strFile in Directory.GetFiles(strDirectory)) { // Don't add any existing Zip files since we don't want to delete previously compressed files. if (!bCompressedOnly || Path.GetExtension(strFile).ToLower().Equals(".zip")) { yield return strFile; } } foreach (var strDir in Directory.GetDirectories(strDirectory)) { foreach (var strFile in getFiles(strDir, bCompressedOnly)) { yield return strFile; } } }

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• Question creating PDF document in Zend Framework

  - by deaddancer

  I need to take a ZF rendered view and create a PDF that should look pretty much exactly the same, and email it. The major issue I have right now is getting the HTML created by the view into a string that I can then process with the Zend_PDF::parse method. The view I need to turn into a PDF is the result of a posted form. I've tried grabbing the contents of ob_get_contents into a string after a successful post, but for some reason its not in there. Should I press on with this angle? Any help would be greatly appreciated!

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• How can I ask Hibernate to create an index on a foreign key (JoinColumn)?

  - by Kent Chen

  Hi, This is my model. class User{ @CollectionOfElements @JoinTable(name = "user_type", joinColumns = @JoinColumn(name = "user_id")) @Column(name = "type", nullable = false) private List<String> types = new ArrayList<String>(); } You can imagin there would be a table called "user_type", which has two columns, one is "user_id", the other is "type". And when I use hbm2ddl to generate the ddls, I can have this table, along with the foreign key constraint on "user_id". However, there is no index of this for this column. And I need this index. How can I let hibernate to generate this index for me? Thank you!

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• Call functions in an event/function chain?

  - by acidzombie24

  I have 3 functions. They can be called in any order (later they may need specific order). The return value of one function should be the first param of the next. How do i do this? what i am thinking is something like the below. Whats the best way to do this? string void fn(string sz, data d, eventhdl nextFunc) { //do stuff if(nextFunc == null) return ret; else return nextFunc(ret, d, nextFunc.Next); }

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• how to display CFStringType? Like kABHomeLabel

  - by xiaozi

  I know that NSString and CFString are toll-bridge, they can convert in such a way. CFStringRef cfStr; NSString* anStr=(NSString*)cfStr; however,when I convert string in such a case when dealing addressbook NSString* homeLabel=(NSString*)kABWorkLabel; then homeLabel is "$!!$"; the other pre-defined CFStringRef in the addressbook property is the same. in my program,I want to get both the label and the label item's info. NSString* label=ABMultiValueCopyLabelAtIndex(multi,i); so how to correctly get the string of the label? Thanks!

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• Is base method able to use derived base data members?

  - by iTayb

  Lets assume we have the following code: abstract class Base1 { protected int num; } class Der1:Base1 { protected Color color; protected string name; } class Der2:Base1 { protected DateTime dthen; } and so on. An array of base1 type exists and includes many objects created out of classes that are derived from base1. Is it possible to define the toString() method in the base class only? something like: public override string toString() { if (this is Der1) return "num = " + this.num + "color = " + this.color.toString() + " name = " this.name; if (this is Der2) return "num = " + this.num + "dthen = " + this.dthen.toString(); // and so on ... } Thank you very much :) P.S. This is not an homework question. I've just wondered about.

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• Execute an external application as root - problem

  - by user598011

  Good morning: I'm trying to run an external application that needs to be executed as root. I have to read the lines from exit after the execution of this application but it says "permission denied", as if the its not been done correctly. I've been thinking over a time and I can not move forward. The code is as follows: process = Runtime.getRuntime().exec("su"); String[] command = {external application command}; process = Runtime.getRuntime().exec(comando); InputStream inputStream = process.getInputStream(); BufferedReader bufferedReader = null; try { bufferedReader = new BufferedReader(new InputStreamReader(inputStream),8192); String line = null; while ((line = bufferedReader.readLine()) != null) { System.out.println("read line:"+line ); } } catch (IOException ioe) { ioe.printStackTrace(); } process.waitFor(); Does anyone know why not let me run the command? Thanks.

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• How to bind WPF TreeView to a List<Drink> programmatically?

  - by Joan Venge

  So I am very new to WPF and trying to bind or assign a list of Drink values to a wpf treeview, but don't know how to do that, and find it really hard to find anything online that just shows stuff without using xaml. struct Drink { public string Name { get; private set; } public int Popularity { get; private set; } public Drink ( string name, int popularity ) : this ( ) { this.Name = name; this.Popularity = popularity; } } List<Drink> coldDrinks = new List<Drink> ( ){ new Drink ( "Water", 1 ), new Drink ( "Fanta", 2 ), new Drink ( "Sprite", 3 ), new Drink ( "Coke", 4 ), new Drink ( "Milk", 5 ) }; } } How can I do this in code? For example: treeview1.DataItems = coldDrinks; and everything shows up in the treeview.

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• Using JS Methods in jQuery

  - by Wasabi

  In the following code snippet, the String.fromCharCode is used, can all JS methods be used within jQuery? Perhaps a noob question, but better to ask and prove a noob, then assume and be a fool. // Invoke setBodyClass when a key is pressed $(document).keyup(function(){ switch (String.fromCharCode(event.keyCode)){ case 'D': setBodyClass('default'); break; case 'N': setBodyClass('narrow'); break; case 'L': setBodyClass('large'); break; } });//end keyup

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• Arrange 0's & 1's in a array

  - by Ganesh M

  This is one of an interview question which I had recently. I would like to know others perception of approach for this problem. Question: You are given a structure which holds an employee details with two elements as int Deptartment and string Name. struct Employee { string Name; int Dept; } You are given details of N Employees among which there are N/2 employees Dept are 0's and N/2 employees dept are 1's arranged in some random order. You need to sort the employee details based on their Dept value and it should be stable i.e., the order of 1s and 0s in the original record should be maintained. For example, given the following sample data: Name Dept X1 0 X2 1 X3 0 X4 1 X5 0 after sorting the result should be: Name Dept X2 1 X4 1 X1 0 X3 0 X5 0 The algorithm should be stable and the complexity should be o(N), with constant space for additional variables (which means sorting should be done in-place).

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• Is there a way to test if a scalar has been stringified or not?

  - by Yobert

  I am writing a thing to output something similar to JSON, from a perl structure. I want the quoting to behave like this: "string" outputs "string" "05" outputs "05" "5" outputs "5" 5 outputs 5 05 outputs 5, or 05 would be acceptable JSON::XS handles this by testing if a scalar has been "stringified" or not, which I think is very cool. But I can't find a way to do this test myself without writing XS, which I'd rather avoid. Is this possible? I can't find this anywhere on CPAN without finding vast pedantry about Scalar::Util::looks_like_number, etc which completely isn't what I want. The only stopgap I can find is Devel::Peek, which feels evil. And also, just like JSON::XS, I'm fine with this secenario: my $a = 5; print $a."\n"; # now $a outputs "5" instead of 5)

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• NoSuchMethodException while using JAVA Reflection

  - by Appps

  Hi I'm trying to use reflection to invoke a method and update the setter value of that method. But I'm getting NoSuchMethodException while ivoking that method. com.test.Test.setAddress1(java.lang.Double) .But I've this method defined in my Class. Is the problem with my code. Can someone please help me? Thanks in advance. I've my code below. Class[] doubleArrayParamTypes = new Class[ 1 ]; doubleArrayParamTypes[ 0 ] = Double.class; Class class=Class.forName( "com.test.Test"); Object voObject = class.newInstance(); String data="TestData"; performMapping(class,"setAddress1",doubleArrayParamTypes ,voObject,data); /* Reflection to set the data */ private void performMapping(Class class,String methodName,Class[] clazz,Object voObject,Object data) { class.getMethod( "set" + methodName, clazz ).invoke( voObject, data ); }

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• Recordset Update errors when updating sql_variant field

  - by Stephen Nutt

  I'm using C++ and ADO to add data to a SQL Server 2005 database. When calling the Recordset Update method for a sql_variant column I'm getting the error DB_E_ERRORSOCCURRED and the error message Multiple-step OLE DB operation generated errors. Check each OLE DB status value, if available. No work was done. If the value I'm adding is NULL all works fine and all values going to the fields that are not sql_variant types work. Does anyone know what I might be doing wrong? Thanks [Edit] I have some more information. The value we are storing is the empty string - ADO appears to want to store this in the sql_variant as a nchar(0), which of course is not a valid SQL data type. Is there a way to get an empty string in a sql_variant using the ADO batch commands?

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• ASP.NET MVC 2 model properties binding order

  - by bniwredyc

  Is there a way to change order in which the default binder binds property values of model? For example I have model class A: class A { public string A1 {get; set;} public string A2 {get; set;} } and action DoSomethig: public ActionResult DoSomething(A model) { ... } I want that A2 property has been bound before the A1 property. Is it possible? Or I need to write custom binder?

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• Read file structure into an array, but only specific files.

  - by dmackerman

  I have a directory structure that looks like this: /expandables - folder - folder - folder - folder - BannerInfo.txt - index.html Each one of the folder has the same exact stucture. One file named BannerInfo.txt and index.html. There are about 250 of these folders if that matters. I want to loop through these folders and store each of the index.html files into an array. Inside of the index.html file is just some simple HTML and Javascript of which I want to read into a string to be displayed later on. I'm struggling with how to filter out only the index.html file from the individual folders. The purpose of this is because I want to randomly select an index.html file and put the contents into a textarea. I thought I could do a simple array_rand() on the returned array and spit out the string. Any ideas?

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• How to get the content of two xml tags even when they have another xml tags inside them (PHP-XML)

  - by Harry

  In simple terms, let's suppose you have the following xml structure: <TEXT>Well, I need some help as you <CUSTOMTAG>can</CUSTOMTAG> see.</TEXT> When extracting the text of this node in PHP with strip_tags(), I am not getting the content of tags. First step: What I want to do, is to extract and thus have the following string: "Well, I need some help as you can see." Second step: I would also like to convert the <CUSTOMTAG> and </CUSTOMTAG> to something else, like <e> and </e> for example, and finally have the following string: "Well, I need some help as you <e>can</e> see." I would appreciate only tested and working code. Thanks in advance! Kind Regards

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• display result in status after it post

  - by nisardotnet

  my question is continuation of what i have posted here i want to know how to display a result status based on my return result from Web Method here is my post code: beforeSubmit: function(data) { var myData = { "firstName": escape($('#txtFirstName').val()), "lastName": escape($('#txtLastName').val()) }; $.ajax(<br> { type: "POST", url: "VisitorWS.asmx/AddVisitors", data: JSON.stringify(myData), contentType: "application/json; charset=utf-8", dataType: "json", success: function(data) { $("#status").fadeTo(500, 1, function() { $(this).html("You are now registered!").fadeTo(5000, 0); }) }, error: function(data) { $("#status").fadeTo(5000, 1, function() { $(this).html("Failed!").fadeTo(5000, 0); }) } }); WebMethod [WebMethod] public bool AddVisitors(string firstName, string lastName) { if (firstName == "test") { return true; } return false; } so based on true or false i want to display a message on the client side.

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• .NET Regular Expressions - Shorter match

  - by Xavier

  Hi Guys, I have a question regarding .NET regular expressions and how it defines matches. I am writing: var regex = new Regex("<tr><td>1</td><td>(.+)</td><td>(.+)</td>"); if (regex.IsMatch(str)) { var groups = regex.Match(str).Groups; var matches = new List<string>(); for (int i = 1; i < groups.Count; i++) matches.Add(groups[i].Value); return matches; } What I want is get the content of the two following tags. Instead it returns: [0]: Cell 1</td><td>Cell 2</td>... [1]: Last row of the table Why is the first match taking </td> and the rest of the string instead of stopping at </td>?

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