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• How do I remedy "Error: Cannot find module 'child-process-close'"?

  - by Tyler Sloan

  I was going about business as usual and about to checkout generator-angular-fullstack. I got no red errors but a message a the end saying Error: Cannot find module 'child-process-close'. I tried many a-thing–uninstalling node, reinstalling, manually getting rid of files and directories in local and/or global paths and tried to make sure Homebrew was the one who installed everything and somehow I've made things worse. (Also, I initially saw errors regarding karma. Everything looked right but it doesn't seem I did any good by throwing commands at it.) I am at a loss. All the stackoverflow questions have been clicked and I'm afraid I've probably tried too many of the suggestions. I cannot install any Yeoman generator. I cannot install anything with npm. When inside the project directory when I run npm install it throws the error. I really have no clue. Is there a way I can basically start over all together? A simple uninstall and install isn't cutting it. Something in the system needs to change but I don't know what. Any ideas?

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• How to secure Add child record functionality in MVC on Parent's view?

  - by RSolberg

  I'm trying to avoid some potential security issues as I expose some a new set of functionality into the real world. This is basically functionality that will allow for a new comment to be added via a partialview on the "Parent" page. My comment needs to know a couple of things, first what record is the comment for and secondly who is making the comment. I really don't like using a hidden field to store the ID for the Parent record in the add comment form as that can be easily changed with some DOM mods. How should I handle this? PARENT <% Html.RenderPartial("AddComment", Model.Comments); %> CHILD <%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl<CommentsViewModel>" %> <% using (Html.BeginForm("AddComment", "Requests")) {%> <fieldset> <legend>New Comment</legend> <%= Html.HiddenFor(p => p.RequestID) %> <%= Html.TextBoxFor(p => p.Text) %> &nbsp; <input type="submit" value="Add" /> </fieldset> <% } %> CONTROLLER [AcceptVerbs(HttpVerbs.Post)] public void AddComment(CommentsViewModel commentsModel) { var user = GetCurrentUser(); commentsModel.CreatedByID = user.UserID; RequestsService.AddComment(commentsModel); }

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• How can I tell the Data Annotations validator to also validate complex child properties?

  - by GWB

  Can I automatically validate complex child objects when validating a parent object and include the results in the populated ICollection<ValidationResult>? If I run the following code: using System; using System.Collections.Generic; using System.ComponentModel.DataAnnotations; namespace ConsoleApplication1 { public class Person { [Required] public string Name { get; set; } public Address Address { get; set; } } public class Address { [Required] public string Street { get; set; } [Required] public string City { get; set; } [Required] public string State { get; set; } } class Program { static void Main(string[] args) { Person person = new Person { Name = null, Address = new Address { Street = "123 Any St", City = "New York", State = null } }; var validationContext = new ValidationContext(person, null, null); var validationResults = new List<ValidationResult>(); var isValid = Validator.TryValidateObject(person, validationContext, validationResults); Console.WriteLine(isValid); validationResults.ForEach(r => Console.WriteLine(r.ErrorMessage)); Console.ReadKey(true); } } } I get the following output: False The Name field is required. But I was expecting something similar to: False The Name field is required. The State field is required.

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• How to prevent MDI main form closing from MDI Child.

  - by Rekreativc

  Hello! I have a MDI main form. On it I host a form, and I want it to show a message box before it closes (asking the user whether to save changes). So far so good, however I have discovered that closing the MDI main form does not raise a MDI child FormClosing event. I figured I will just call MdiChild.Close() in the MDI main's FormClosing event (which does get raised). This seams to work, however it does causes a problem... In the messagebox that I show, I offer the user to save changes, not to save changes and cancel closing. Normally this works fine, however I can't seem to find a way to cancel MDI main's FormClosing event. Is there a elegant way of doing this? EDIT: I solved this by throwing an exception (when user decides to cancel the closing procedure) which is caught in MDI main's FormClosing event. In this way I know when I have to cancel the MDI main's FormClosing event and this seams to work fine ... However I just can't believe that this "hax" is the only way of doing this. Surely there is a better way?

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• Need to add hover intent?

  - by Bradley Bell

  Hi all, I'm really stuck. Basically i'm totally new to jquery, but need to add some kind of timer on mousover so that the page doesn't get messed up if the mouse goes all over the page. here's my script.. anyway i can easily implement it? <script> jQuery('cc').mouseover(function () { $("squareleft3").hide(); $("twitter").hide(); $("facebook").hide(); $("squareright").hide(); $("getintouch").hide(); $("getintouch2").hide(); $("getintouch3").hide(); $("vicarimage").hide(); $("squaredown2").hide(); $("squareleft2").hide(); $("one").hide(); $("whatis").hide(); $("squaredown").hide(); $("whoweare").hide(); if ($("whoweare:first").is(":hidden")) if ($("squaredown:first").is(":hidden")) if ($("squareleft3:first").is(":hidden")) { if ($("twitter:first").is(":hidden")) if ($("squareright:first").is(":hidden")) if ($("getintouch:first").is(":hidden")) if ($("getintouch2:first").is(":hidden")) if ($("getintouch3:first").is(":hidden")) if ($("vicarimage:first").is(":hidden")) if ($("squaredown2:first").is(":hidden")) if ($("squareleft2:first").is(":hidden")) if ($("one:first").is(":hidden")) if ($("whatis:first").is(":hidden")) jQuery('getinvolved').fadeIn(); jQuery('squareleft').slideToggleWidth(); } else { $("squareleft").hide(); $("getinvolved").hide(); } } ); </script> Cheers.

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• Ruby on Rails: how to get error messages from a child resource displayed?

  - by randombits

  I'm having a difficult time understanding how to get Rails to show explicitly the error messages that a child resource is failing on when I render an XML template. Hypothetically, I have the following classes: class School < ActiveRecord::Base has_many :students validates_associated :students end class Student < ActiveRecord::Base belongs_to :school validates_format_of :email, :with => /^([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})$/i, :message => "You must supply a valid email" end Now, in the controller, let's say we want to build a trivial API to allow us to add a new School with a student in it (again, I said, it's a terrible example, but plays its role for the purpose of the question) class SchoolsController < ApplicationController def create @school = School.new @student = school.students.build @student.email = "bad@email" respond_to do |format| if @school.save # some code else format.xml { render :xml => @school.errors, :status => :unprocessable_entity } end end end end Now the validation is working just fine, things die because the email doesn't match the regex that's set in the validates_format_of method in the Student class. However the output I get is the following: <?xml version="1.0" encoding="UTF-8"?> <errors> <error>Students is invalid</error> </errors> I want the more meaningful error message that I set above with validates_format_of to show up. Meaning, I want it to say: <error>You must supply a valid email</error> What am I doing wrong for that not to show up?

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• In Python, how can I find the index of the first item in a list that is NOT some value?

  - by Ryan B. Lynch

  Python's list type has an index(x) method. It takes a single parameter x, and returns the (integer) index of the first item in the list that has the value x. Basically, I need to invert the index(x) method. I need to get the index of the first value in a list that does NOT have the value x. I would probably be able to even just use a function that returns the index of the first item with a value != None. I can think of a 'for' loop implementation with an incrementing counter variable, but I feel like I'm missing something. Is there an existing method, or a one-line Python construction that can handle this? In my program, the situation comes up when I'm handling lists returned from complex regex matches. All but one item in each list have a value of None. If I just needed the matched string, I could use a list comprehension like '[x for x in [my_list] if x is not None]', but I need the index in order to figure out which capture group in my regex actually caused the match.

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• In a class with no virtual methods or superclass, is it safe to assume (address of first member vari

  - by Jeremy Friesner

  Hi all, I made a private API that assumes that the address of the first member-object in the class will be the same as the class's this-pointer... that way the member-object can trivially derive a pointer to the object that it is a member of, without having to store a pointer explicitly. Given that I am willing to make sure that the container class won't inherit from any superclass, won't have any virtual methods, and that the member-object that does this trick will be the first member object declared, will that assumption hold valid for any C++ compiler, or do I need to use the offsetof() operator (or similar) to guarantee correctness? To put it another way, the code below does what I expect under g++, but will it work everywhere? class MyContainer { public: MyContainer() {} ~MyContainer() {} // non-virtual dtor private: class MyContained { public: MyContained() {} ~MyContained() {} // Given that the only place Contained objects are declared is m_contained // (below), will this work as expected on any C++ compiler? MyContainer * GetPointerToMyContainer() { return reinterpret_cast<MyContainer *>(this); } }; MyContained m_contained; // MUST BE FIRST MEMBER ITEM DECLARED IN MyContainer int m_foo; // other member items may be declared after m_contained float m_bar; };

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• Is there a more elegant way to act on the first and last items in a foreach enumeration than count++

  - by Edward Tanguay

  Is there a more elegant way to act on the first and last items when iterating through a foreach loop than incrementing a separate counter and checking it each time? For instance, the following code outputs: >>> [line1], [line2], [line3], [line4] <<< which requires knowing when you are acting on the first and last item. Is there a more elegant way to do this now in C# 3 / C# 4? It seems like I could use .Last() or .First() or something like that. using System; using System.Collections.Generic; using System.Text; namespace TestForNext29343 { class Program { static void Main(string[] args) { StringBuilder sb = new StringBuilder(); List<string> lines = new List<string> { "line1", "line2", "line3", "line4" }; int index = 0; foreach (var line in lines) { if (index == 0) sb.Append(">>> "); sb.Append("[" + line + "]"); if (index < lines.Count - 1) sb.Append(", "); else sb.Append(" <<<"); index++; } Console.WriteLine(sb.ToString()); Console.ReadLine(); } } }

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• Why doesn't keyboard input work for a ScrollViewer when the child control has input focus?

  - by Ashley Davis

  Why doesn't keyboard input work for a ScrollViewer when the child control has input focus? This is the scenario. A WPF window opens. It sets the focus to a control that is embedded in a ScrollViewer. I hit the up and down and left and right keys. The ScrollViewer doesn't seem to handle the key events, anyone know why? This is the simplest possible example: <Window x:Class="WpfApplication1.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Window1" Height="300" Width="300" FocusManager.FocusedElement="{Binding ElementName=control}" > <Grid> <ScrollViewer HorizontalScrollBarVisibility="Auto" > <ItemsControl x:Name="control" Width="1000" Height="1000" /> </ScrollViewer> </Grid> </Window> When you start the app that contains this window, "control" appears to have the focus as I intended. Pressing the key seems to result in bubbling key events reaching the ScrollViewer (I checked for this using WPF Snoop). I can't work out why it doesn't respond to the input.

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• Multiple XML/XSLT files in PHP, transform one with XSLT and add others but process it first with PHP

  - by ipalaus

  I am processing XML files transformations with XSLT in PHP correctly. Actually I use this code: $xml = new DOMDocument; $xml->LoadXML($xml_contents); $xsl = new DOMDocument; $xsl->load($xsl_file); $proc = new XSLTProcesoor; $proc->importStyleSheet($xsl); echo $proc->transformToXml($xml); $xml_contents is the XML processed with PHP, this is done by including the XML file first and then assigning $xml_contents = ob_get_contents(); ob_end_clean();. This forces to process the PHP code on the XML, and it works perfectly. My problem is that I use more than one XML file and this XML files has PHP code on it that need to be processed AND have a XSLT file associated to process the data. Actually I'm including this files in XSLT with the next code: <!-- First I add the XML file --> <xsl:param name="menu" select="document('menu.xml')" /> <!-- Next I add the transformations for menu.xml file --> <xsl:include href="menu.xsl" /> <!-- Finally, I process it on the actual ("parent") XML --> <xsl:apply-templates select="$menu/menu" /> My questiion is how I can handle this. I need to add mutiple XML(+XSLT) files to my first XML file that will containt PHP so it needs to be processed. Thank you in advance!

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• Why does setting the margin on a div not affect the position of child content?

  - by DanM

  I'd like to understand a little more clearly how css margins work with divs and child content. If I try this... <div style="clear: both; margin-top: 2em;"> <input type="submit" value="Save" /> </div> ...the Save button is right up against the User Role (margin fail): If I change it to this... <div style="clear: both;"> <input style="margin-top: 2em;" type="submit" value="Save" /> </div> ...there is a gap between the Save button and the User Role (margin win): Questions: Can someone explain what I'm observing? Why doesn't putting a margin on the div cause the input to move down? Why must I put the margin on the input itself? There must be some fundamental law of css I am not grasping.

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• Implimenting Zend MVC for my existing site-first step?

  - by Joel

  Hi guys, OK-newbie question here. I'll try not to bombard SO with lots of questions-and hopefully this first one will show me the method I'll need to follow for subsequent conversions. I have a web-based calendar system that I developed, but it was coded for me procedurally (using PHP). I'm now working on learning OO and wanting to integrate this site into my localhost Zend Framework and slowly start converting parts to OO and the Zend Framework MVC process in particular. As I've said before, I understand that this will be a slow process, and when I'm done, I still probably won't have anything as OO friendly as if I had rewritten it from scratch, but I'd like to use this as a learning experience. So, I have dropped the whole site into my localhose/zend/Public folder, and everything is showing up great and linking to the database, etc. My question is-what would be the easiest first component to switch over to the MVC model? This site has a bit of everything-forms, login, authentication, some jQuery, etc. Can anyone point to a tutorial that would address what I'm trying to do? If indeed, a form would be one of the simpler things to switch, can someone walk me through those changes? Another idea is changing over all the header info, etc? Thanks for any pointers on where to start! EDIT: Also, I understand that SO is mainly for specific coding questions-I'm happy to share specific code, once I have an idea about which section to tackle first...

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• Strange offset space between <button> as parent container and <div> as child.

  - by Maxja

  I need to decorate a standard html button. The base element I took <button> instead of <input>, cos I decided that the element must be a parent container. And there is child element <div> in it. This <div> element will be been the core element for decoration, and should occupy the entire space of the parent element - button. <button> <div>*decoration goes here*</div> </button> And within Cascading Style Sheets it might be looks like this: css button { margin: 0; border: 0; padding: 0; width: *150*px; height: *50*px; position: relative; } div { margin: 0; border: 0; padding: 0; width: 100%; height: 100%; background: *black*; position: absolute; top: 0; left: 0; } html <button type="button"> <div>*decoration goes here*</div> </button> So, Opera(10) is doing well, webkits Chrome(6) and Safari(4) is doing also well, but Internet Explorer(8) is bad - DOM Inspector shows some strange Offset space in top and left, FireFox(3) is also bad - DOM Inspector shows that <div> get some negative value in css-property right: and bottom:. Even if this property will set to zero(0) DOM-Inspector still shows same negative value. I almost broke my brain. Help me, solve this problem, please!

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• Can a second stored procedure doing the same thing finish before first one?

  - by evanmortland

  Hello, I have an audit record table that I am writing to. I am connecting to MyDb, which has a stored procedure called 'CreateAudit', which is a passthrough stored procedure to another database on the same machine called 'CreatedAudit' as well. I call the CreateAudit stored procedure from my application, using subsonic as the DAL. The first time I call it, I call it with the following (pseudocode): Result = CreateAudit(recordId, "Opened") Right after that, I call: Result2 = CreateAudit(recordId, "Closed") In my second stored procedure it is supposed to mark the record that was created by the CreateAudit(recordId, "Opened") with a status of closed. It works great if I run them independently of one another, but when they run in sequence in the application, the record is not marked as "Closed". When I run SQL profiler I see that both queries ran, and if I copy the queries out and run them from query analyzer the record gets marked as closed 100% of the time! When I run it from the application, about once every 20 times or so, the record is successfully marked closed - the other 19 times nothing happens, but I do not get an error! Is it possible for the .NET app to skip over the ouput from the first stored procedure and start executing the second stored procedure before the record in the first is created? When I add a "WAITFOR DELAY '00:00:00:003'" to the top of my stored procedure, the record is also closed 100% of the time. My head is spinning, any ideas why this is happening! Thanks for any responses, very interested in hearing how this can happen.

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• Why does setting the margin on a div not affect the position of child content?

  - by DanM

  I'd like to understand a little more clearly how css margins work with divs and child content. If I try this... <div style="clear: both; margin-top: 2em;"> <input type="submit" value="Save" /> </div> ...the Save button is right up against the User Role (margin fail): If I change it to this... <div style="clear: both;"> <input style="margin-top: 2em;" type="submit" value="Save" /> </div> ...there is a gap between the Save button and the User Role (margin win): Questions: Can someone explain what I'm observing? Why doesn't putting a margin on the div cause the input to move down? Why must I put the margin on the input itself? There must be some fundamental law of css I am not grasping.

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• EF Code First, how can I achieve two foreign keys from one table to other table?

  - by Yoo Matsuo

  I've recently downloaded Entity Framework Code First CTP5, and have a trouble with this scenario. I have two tables as follows: Members table ID Name Comments table ID Comment CommentedMemberID CommentMemberID And, the data should be like the following: Members ID Name 1 Mike 2 John 3 Tom Comments ID Comment CommentedMemberID CommentMemberID 1 Good 1 2 2 Good 1 3 3 Bad 2 1 Then, I coded as shown below: public class Member { public int ID {get; set; } public string Name { get; set;} public virtual ICollection Comments { get; set;} } public class Comment { public int ID { get; set; } public string Comment { get; set; } public int CommentedMemberID { get; set; } public int CommentMemberID{ get; set; } public virtual Member CommentedMember { get; set; } public virtual Member CommentMember { get; set; } } public class TestContext : DbContext { public DbSet Members { get; set; } public DbSet Comments { get; set; } } But when I run these models on my cshtml, it gives me errors saying "Cannot create CommentMember instance" or something like that (Sorry, I already changed my models to proceed the EF Code First evaluation, so can't reproduce the same error). I've also tried to use OnModelCreating on the TestContext, but can't find any good instructions and don't know what to do. I saw a blog post of the EF Code First CTP3, and it seems there was a RelatedTo attribute in that version, but now it has gone. Could anyone know how to get it work properly? Or is this a totally wrong way to go with this scenario? Thanks, Yoo

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• Is there any way to manipulate variables passed in to a child class constructor before passing it of

  - by Matt

  Hi, Is there any way to delay calling a superclass constructor so you can manipulate the variables first? Eg. public class ParentClass { private int someVar; public ParentClass(int someVar) { this.someVar = someVar; } } public class ChildClass : ParentClass { public ChildClass(int someVar) : base(someVar) { someVar = someVar + 1 } } I want to be able to send the new value for someVar (someVar + 1) to the base class constructor rather than the one passed in to the ChildClass constructor. Is there any way to do this? Thanks, Matt

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• Why not open a PDF file in the browser but first save it to the harddisk?

  - by Lernkurve

  Question Is it correct that saving a PDF to the harddisk first, and then opening it from there with some PDF reader (not the browser) is safer than opening it directly with the browser plugin? My current understanding I know that the PDF browser plugin might have a security leak and a manipulated PDF file might exploit it and get access to the user's computer. I recently heard that saving the PDF file frist and opening it then was safer. I don't understand why that should be safer. Can anyone explain? My logic would suggest that a manipulated file started from the harddisk can just as well exploit a security leak, say for instance, of Adobe Acrobat Reader.

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• At what year in history was computers first used to store porn? [closed]

  - by Emil H

  Of course this sounds like a joke question, but it's meant seriously. I remember being told by an old system administrator back in the early nineties about people asking about good FTPs for porn, and that they would as a joke always tell them to connect to 127.0.0.1. They would come back saying that there was a lot of porn at that address, but that oddly enough it seemed like they already had it all. Point being, it seems like it's been around for quite a while. Anyway. Considering that a considerable portion of the internet is devoted to porn these days, it would be interesting to know if someone has any kind of idea as to when and where the phenomena first arose? There must be some mention of this in old hacker folk lore? (Changed to CW to emphasize that this isn't about rep, but about genuine curiousity. :)

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• Do parent website application pools serve child application pools as well?

  - by Mike G

  I am running a .NET web application in its own application pool on IIS7. The parent website is set to run in its own application pool. Today we noticed a huge number of connections going to IIS. I tried to browse a plain ol' .html page in the directory of the web application and it hangs. I then try to browse another plain .html file in the root of the parent website, and it too hangs. In performance monitor, i see there are some 8k connections to the default website and climbing. I cant seem to understand if my application was the problem, or IIS itself. If it was my application, wouldnt the html page in the root of the parent website still be able to be served? edit: Also, if i shut down the app pool to my application, the html page on the root of the parent website is still not able to be displayed.

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• How to create a user account for a child in Linux Mint?

  - by zenstealth

  Recently I have renovated an old computer which once belonged to my dad (the old HDD crashed, and I just bought a new one to replace it). My parents want me to fix this computer for my 5-year-old sister to use. I decided to use Linux Mint as the OS because everything (flash, mp3, etc.) is already configured. How do I create a user account in Linux Mint with limited access for my sister, so that it won't mess up the entire system? All she does is surf the web, so I'm just worried that she might accidentally mess up a system setting that I eventually will have to fix it.

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• How to enable extension when running Firefox for the first time?

  - by spektom

  I need to run Firefox each time in a new profile directory with my extension enabled. What I do is the following: Create temporary directory for storing profile (/tmp/profile.123) Create extensions directory (/tmp/profile.123/extensions) Create extension proxy as described here (/tmp/profile.123/extensions/[email protected]) My command line looks like this: firefox -no-remote -profile /tmp/profile.123 -url http://www.google.com The problem is that my extension starts disabled, and I'm forced to enable it manually and restart the Firefox. Is it possible to make it start enabled in first place? Thanks! Workaround I've found: Create extensions.sqlite database file in the newly created profile folder. This file must contain my extension entry under the "addon" table.

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• Two-page view in Word, shouldn't the first page be on the right?

  - by Cylindric

  Greetings Superusers, I'm putting together a lengthy document in Word, and it's going to be printed and bound duplex. I've put page-numbers "outside" etc, and all is pretty. The problem is, in the "Two Pages" view, it puts p1 on the left, then p2 on the right, then p3 below on the left, and p4 on the right. p1 p2 p3 p4 p5 p6 Shouldn't this be slightly different though? When I get to print it, p1 is on the right, not the left, so the preview should go p1 p2 p3 p4 p5 p6 Because when I "open" the book, it's pages 2 and 3 that are side-by-side. This makes layout tweaking confusing, because it's not instantly obvious which pages will be "visible" to the reader at the same time together. Have I missed something? I can't just put a blank page first, because that would bugger up the printing, as the printer automatically duplexes and binds etc. (Office 2008, by the way)

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• What would cause previously sent emails to be sent again from Exchange the first time someone logs i

  - by Ken Pespisa

  A few users testing our Citrix XenApp service found that several (seemingly random) previously sent emails were sent out immediately after they logged into Outlook via Citrix for the first time. The problem hasn't occurred for them since. After one user had this happen, and we scratched our heads about it thinking it was a fluke, our IT director had this same issue. I guess I'd rule out any PEBKAC issues. I really don't know where to begin troubleshooting this problem. If you have any ideas what could have caused this, I'd appreciate you sharing them, as strange or far-fetched as they may seem :)

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