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• VB.net Net after load event?

  - by themaninthesuitcase

  I need some way of knowing when a form has finished loading. My reasoning is I have a 2nd form that is loaded when this form loads. The code for this is called from form1.load. Form2 is currently being displayed behind form1 as I am guessing form1 calls an activate or similar at the end of the load so any Activate, BringToFront etc calls on from2 are over ridden. If you look at the code below I have tried adding frmAllocationSearch.Activate, frmAllocationSearch.BringToFront and Me.SendToBack after the call to ShowAlloactionSearchDialog() but these are all wasted as something is happening after the load event is fired to bring Me to the front. Code is: Private Sub Allocation_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load ShowAlloactionSearchDialog() End Sub Private Sub ShowAlloactionSearchDialog() If frmAllocationSearch Is Nothing OrElse frmAllocationSearch.IsDisposed Then frmAllocationSearch = New AllocationSearch frmAllocationSearch.MdiParent = Me.MdiParent frmAllocationSearch.Info = Me.Info frmAllocationSearch.Top = Me.Top frmAllocationSearch.Left = Me.Left + Me.Width - frmAllocationSearch.Width frmAllocationSearch.AllocationWindow = Me frmAllocationSearch.Show() Else If frmAllocationSearch.WindowState = FormWindowState.Minimized Then frmAllocationSearch.WindowState = FormWindowState.Normal frmAllocationSearch.Activate() End If End Sub

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• New to web development - backend questions

  - by James

  I'm new to web development although I'm confident in the roadmap for the front-end. I need direction on two things: Basic architecture Back-end technologies For architecture, what do I need to get started? From what I know, its: Get a domain name registered (godaddy?) Find a web host ??? anything else? or start developing the site? I don't think its that easy, there must be something I'm missing, right? For the back-end technologies, I have application development experience with Java and Python, but how likely is it to find a back-end hosting site that supports these languages over PHP? Is PHP a better choice? If I stick with what I know for the back-end, am I sabotaging myself later on? If I need help, how is the market for a python/java developer vs. a php developer? What do I need to know about databases? I have some basic SQL experience. Do hosting sites have limitations on the type of databases or bandwidth I need to worry about? I'm working through some of the common sites: StackOverflow, Sitepoint forums, Google, etc...are there other resources I should use?

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• Getting Argument Names In Ruby Reflection

  - by Joe Soul-bringer

  I would like to do some fairly heavy-duty reflection in the Ruby programming language. I would like to create a function which would return the names of the arguments of various calling functions higher up the call stack (just one higher would be enough but why stop there?). I could use Kernel.caller go to the file and parse the argument list but that would be ugly and unreliable. The function that I would like would work in the following way: module A def method1( tuti, fruity) foo end def method2(bim, bam, boom) foo end def foo print caller_args[1].join(",") #the "1" mean one step up the call stack end end A.method1 #prints "tuti,fruity" A.method2 #prints "bim, bam, boom" I would not mind using ParseTree or some similar tool for this task but looking at Parsetree, it is not obvious how to use it for this purpose. Creating a C extension like this is another possibility but it would be nice if someone had already done it for me. Edit2: I can see that I'll probably need some kind of C extension. I suppose that means my question is what combination of C extension would work most easily. I don't think caller+ParseTree would be enough by themselves. As far as why I would like to do this goes, rather than saying "automatic debugging", perhaps I should say that I would like to use this functionality to do automatic checking of the calling and return conditions of functions. Say def add x, y check_positive return x + y end Where check_positive would throw an exception if x and y weren't positive (obviously, there would be more to it than that but hopefully this gives enough motivation)

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• Inserting a ContentControl after another ContentControl

  - by Markus Roth

  In our VSTO Word 2010 Addin, we are trying to insert a RichTextControl after a given other ContentControl. We have tried this: public ContentControl AddContentControl(WdContentControlType type, int position) { Paragraph paragraphBefore = null; if (position == 0) { if (WordDocument.Paragraphs.Count == 0) { WordDocument.Paragraphs.Add(); } paragraphBefore = WordDocument.Paragraphs.First; } else { paragraphBefore = Controls.ElementAt(position - 1).Range.Paragraphs.Last; } object start = paragraphBefore.Range.End; object end = paragraphBefore.Range.End + 1; paragraphBefore.Range.InsertParagraphAfter(); Range rangeToUse = WordDocument.Range(ref start, ref end); ContentControl newControl = _ContentControl = _WordDocument.ContentControls.Add(type, rangeToInsert); Controls.Insert(position, newControl); OnNewContentControl(newControl, position); return newControl.ContentControl; } which works fine, unless the control that is before the one we want to insert has an empty paragraph at the end. If that is the case, the new ContentControl is inserted within the last control. How can we avoid this?

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• How can I save an entire list of items true or false?

  - by JZ

  I'm following Ryan Bates, Railscast episode 52 and I've translated relevant parts of the code to work with Rails 3.0.0.beta2. In Ryan's case, he simply marks items incomplete and saves a timestamp. If an Item contains a timestamp the model returns the item in the completed list. I'm attempting to save ALL values true or false, depending on whether the check_box_tag is selected or not (using boolean). I am able to save ONLY selected items, true or false. How can I save an entire list of items true or false, depending on whether the checkbox is selected? The following is my attempt: controller logic: def yardsign Add.update_all(["yardsign=?", true], :id => params[:yard_ids]) redirect_to adds_path end html.erb: <%= form_tag yardsign_adds_path, :method => :put do %> <% @adds.each do |add| %> <td><%= check_box_tag "yard_ids[]", add.id %></td> <% end %> <% end %> routes.rb resources :adds do collection do put :yardsign end end Terminal Started POST "/adds/yardsign" for 127.0.0.1 at 2010-04-15 19:22:49 Processing by AddsController#yardsign as HTML Parameters: {"commit"=>"Update", "yardsigntakers"=>["1", "2"], "authenticity_token"=>"3arhsxg/Ky+0W7RNM2T3QditMTJmOnLR5CqmMYWN4Qw="} User Load (0.3ms) SELECT "users".* FROM "users" WHERE ("users"."id" = 1) LIMIT 1 SQL (1.8ms) UPDATE "adds" SET yardsign='t' WHERE ("adds"."id" IN (1, 2)) Redirected to http://localhost:3000/adds

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• ActionMailer execution timeout

  - by user275729

  When trying to send an email to the user for reseting their password, I keep getting an execution timed out error. Other mailer functions work, so I know that the config settings are correct. The header reads: "Timeout::Error in Password resetsController#create" Here is the password_resets_controller: def create @user = User.find_by_email(params[:email]) if @user User.deliver_password_reset_instructions(@user.id) flash[:notice] = "Instructions to reset your password have been emailed to you. " + "Please check your email." redirect_to '/' else flash[:notice] = "No user was found with that email address" render :action => :new end end Here is the method inside of User.rb def self.deliver_password_reset_instructions(user_id) user = User.find(user_id) user.reset_perishable_token! Emailer.deliver_password_reset_instructions(user) end Finally, here is the actual method inside of emailer.rb: default_url_options[:host] = "http://0.0.0.0:3000" #development def password_reset_instructions(user) @subject = "FanGamb Password Reset" @from = '[email protected]' @recipients = user.email @sent_on = Time.now @body["edit_password_reset_url"] = edit_password_reset_url(user.perishable_token) @headers["X-SMTPAPI"] = "{\"category\" : \"Password Recovery\"}"#send grid category header end Why is "Password" in the error message referred to causing a timeout::error

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• Ruby socket server thread question: how to send to all clients?

  - by Paul

  I'm making a TCP socket server(ruby). A thread is created for each connected client. At some point I try to send data to all connected clients. The thread aborts on exception while trying.(ruby 1.8.7) require 'socket' # I test it home right now server = TCPServer.new('localhost', 12345); while(session = server.accept) #Here is the thread being created Thread.new(session) do |s| while(msg = s.gets) #Here is the part that causes the error Thread.list.each { |aThread| if aThread != Thread.current #So what I want it to do is to echo the message from one client to all others #But for some reason it doesn't, and aborts on the following string aThread.print "#{msg}\0" end } end end Thread.abort_on_exception = true end What am I doing wrong?

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• AJAX problem-onreadystate does not work

  - by blackmage

  I am having a problem where my AJAX code does not get past the onreadtstate. The if( XMLHttpRequestObject) works fine, but the other part does not. The code is below: enter code here function getXmlHttpRequestObject() { if (window.XMLHttpRequest && !(window.ActiveXObject)) { XMLHttpRequestObject= new XMLHttpRequest(); return XMLHttpRequestObject; } else if (window.ActiveXObject) { try{ XMLHttpRequestObject=new ActiveXObject("Msxml2.XMLHTTP"); return XMLHttpRequestObject; }catch(exception1){ try{ XMLHttpRequestObject= new ActiveXObject("Microsoft.XMLHTTP"); return XMLHttpRequestObject; }catch(exception2){ }//end exception 2 }//end exception 1 }//end if else else{ document.getElementById('ajax_status').innerHTML='Status: Cound not create XmlHttpRequest Object.' + 'Consider upgrading your browser.'; } }//end function getXmlHttpRequestObject() { function loadJavascript( src, url ){ XMLHttpRequestObject=getXmlHttpRequestObject(); if( XMLHttpRequestObject){ //an alert will work here XMLHttpRequestObject.onreadystatechange = function() { alert("Here"); //Nothing at this pint works if (XMLHttpRequestObject.readyState == 4 && XMLHttpRequestObject.status == 200) { includeJavaScript( sId, url, oXmlHttp.responseText ); } } } }//end LoadJavaScript Does anyone have an idea of what can be going wrong?

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• Optimizing mathematics on arrays of floats in Ada 95 with GNAT

  - by mat_geek

  Consider the bellow code. This code is supposed to be processing data at a fixed rate, in one second batches, It is part of an overal system and can't take up too much time. When running over 100 lots of 1 seconds worth of data the program takes 35 seconds (or 35%), executing this function in a loop. The test loop is timed specifically with Ada.RealTime. The data is pregenerated so the majority of the execution time is definatetly in this loop. How do I improce the code to get the processing time down to a minimum? The code will be running on an Intel Pentium-M which is a P3 with SSE2. package FF is new Ada.Numerics.Generic_Elementary_Functions(Float); N : constant Integer := 820; type A is array(1 .. N) of Float; type A3 is array(1 .. 3) of A; procedure F(state : in out A3; result : out A3; l : in A; r : in A) is s : Float; t : Float; begin for i in 1 .. N loop t := l(i) + r(i); t := t / 2.0; state(1)(i) := t; state(2)(i) := t * 0.25 + state(2)(i) * 0.75; state(3)(i) := t * 1.0 /64.0 + state(2)(i) * 63.0 /64.0; for r in 1 .. 3 loop s := state(r)(i); t := FF."**"(s, 6.0) + 14.0; if t > MAX then t := MAX; elsif t < MIN then t := MIN; end if; result(r)(i) := FF.Log(t, 2.0); end loop; end loop; end; psuedocode for testing create two arrays of 80 random A3 arrays, called ls and rs; init the state and result A3 array record the realtime time now, called last for i in 1 .. 100 loop for j in 1 .. 80 loop F(state, result, ls(j), rs(j)); end loop; end loop; record the realtime time now, called curr output the duration between curr and last

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• Ruby custom class to and from YAML;

  - by Sanarothe

  Hi. I'm having trouble deserializing a ruby class that I wrote to YAML. Where I want to be I want to be able to pass one object around as a full 'question' which includes the question text, some possible answers (For multi. choice) and the correct answer. One module (The encoder) takes input, builds a 'question' class out of it and appends it to the question pool. Another module reads a question pool and builds an array of 'question' objects. Where I am currently Sample Question Pool --- | --- !ruby/object:MultiQ a: "no" answer: "no" b: "no" c: "no" d: "no" text: "yes?" Encoder dump to YAML file. Object is a MultiQ filled up with input. (See below.) def dump(file, object) File.open(file, 'a') do |out| YAML.dump(object.to_yaml, out) end object = nil end MultiQ Class definition class MultiQ attr_accessor :text, :answer, :a, :b, :c, :d def initialize(text, answer, a, b, c, d) @text = text @answer = answer @a = a @b = b @c = c @d = d end end The decoder (I've been trying different things, so what's here wasn't my first or best guess. But I'm at a loss and the documentation doesn't really explain things thoroughly enough.) File.open( "test_set.yaml" ) do |yf| YAML.load_documents( yf ) { |item| new = YAML.object_maker( MultiQ, item) puts new } end Questions you can answer How do I achieve my goal? What methods should I use, between parsing, loading files or documents, to successfully deserialize a Ruby class? I've already looked over the YAML Rdoc, and I didn't absorb very much, so please don't just link me to it. What other methods would you suggest using? Is there a better way to store questions like this? Should I be using document db, relational db, xml? Some other format?

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• Will i need two database connection for the following created trigger in MySQL?

  - by Parth

  Will i need two database connection for the following created trigger in MySQL? "DELIMITER $$ DROP TRIGGER `update_data` $$ CREATE TRIGGER `update_data` AFTER UPDATE on `jos_menu` FOR EACH ROW BEGIN IF (NEW.menutype != OLD.menutype) THEN INSERT INTO jos_menuaudit set menuid=OLD.id, oldvalue = OLD.menutype, newvalue = NEW.menutype, field = 'menutype'; END IF; IF (NEW.name != OLD.name) THEN INSERT INTO jos_menuaudit set menuid=OLD.id, oldvalue = OLD.name, newvalue = NEW.name, field = 'name'; END IF; IF (NEW.alias != OLD.alias) THEN INSERT INTO jos_menuaudit set menuid=OLD.id, oldvalue = OLD.alias, newvalue = NEW.alias, field = 'alias'; END IF; END$$ DELIMITER ;" I am using PHP for coding.... EDITED To Execute the previous trigger, will i need to have two DB connection for it? likewise: mysql_select_db('pranav_test'); mysql_select_db('information_schema');

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• AJAX CascadingDropDown ViewState Problem

  - by Steven

  Question: How do I maintain both the contents (from queries) and selected value of both dropdowns after postback? Source Code: Download my source code from this link (link now works). Just add a reference to your AjaxControlToolkit User Action: Select a value from each dropdown. Click Submit. After Postback: StatesDrop: (Selected value), CitiesDrop "Select a City" Before and after: I believe that when the first dropdown gets its selected value, the second dropdown refreshes and therefore loses its selected value. C# answers also welcome. Default.aspx Active States<br /><asp:DropDownList ID="StatesDrop" runat="server" /><br /> Active Cities<br /><asp:DropDownList ID="CitiesDrop" runat="server" /><br /> <ajax:CascadingDropDown ID="StatesCasc" TargetControlID="StatesDrop" ServicePath="WebService1.asmx" ServiceMethod="GetActiveStates" Category="States" runat="server" PromptText="Select a State" PromptValue="?" /> <ajax:CascadingDropDown ID="CitiesCasc" TargetControlID="CitiesDrop" ServicePath="WebService1.asmx" ServiceMethod="GetActiveCities" Category="Cities" runat="server" ParentControlID="StatesDrop" PromptText="Select a City" PromptValue="?" /> WebService1.asmx.vb Imports System.Web.Services Imports System.Web.Services.Protocols Imports System.ComponentModel Imports System.Web.Script.Services Imports AjaxControlToolkit <System.Web.Script.Services.ScriptService()> _ <System.Web.Services.WebService(Namespace:="http://tempuri.org/")> _ <System.Web.Services.WebServiceBinding _ (ConformsTo:=WsiProfiles.BasicProfile1_1)> _ <ToolboxItem(False)> _ Public Class WebService1: Inherits System.Web.Services.WebService <WebMethod()> _ Public Function GetActiveStates (ByVal knownCategoryValues As String, _ ByVal category As String) As CascadingDropDownNameValue() Dim values As New List(Of CascadingDropDownNameValue)() 'Fill values array' Return values.ToArray() End Function <WebMethod()> _ Public Function GetActiveCities (ByVal knownCategoryValues As String, _ ByVal category As String) As CascadingDropDownNameValue() Dim values As New List(Of CascadingDropDownNameValue)() Dim kv As StringDictionary = _ CascadingDropDown.ParseKnownCategoryValuesString(knownCategoryValues) Dim SelState As String = "" If kv.ContainsKey("State") Then SelState = kv("State") 'Fill values array' Return values.ToArray() End Function End Class Default.aspx.vb Imports System.Web.Services Imports System.Web.Script.Services Imports AjaxControlToolkit Partial Public Class _Default Inherits System.Web.UI.Page Protected Sub Submit_Click(ByVal sender As Object, _ ByVal e As EventArgs) Handles SubmitBtn.Click ResultsGrid.DataBind() End Sub End Class

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• What does the * symbol do near a function argument and how to use that in others scenarios?

  - by user502052

  I am using Ruby on Rails 3 and I would like to know what means the presence of a *simbol near a function argument and to understand its usages in others scenarios. Example scenario (this method was from the Ruby on Rails 3 framework: def find(*args) return to_a.find { |*block_args| yield(*block_args) } if block_given? options = args.extract_options! if options.present? apply_finder_options(options).find(*args) else case args.first when :first, :last, :all send(args.first) else find_with_ids(*args) end end end

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• CruiseControl .Net Plugin Vb.net Error

  - by Brian

  I am trying to make my own Labeller plugin for Cruise Control .Net 1.4.3. I have made a class based on another plug in example but I keep getting an error Class 'AssemblyVersionLabeller' must implement 'Function Generate(integrationResult As IIntegrationResult) As String' for interface 'ThoughtWorks.CruiseControl.Core.ILabeller' Here is my code : Imports Exortech.NetReflector Imports ThoughtWorks.CruiseControl.Core Imports ThoughtWorks.CruiseControl.Core.Util Namespace NetAssembly.CCNet.Label _ Public Class AssemblyVersionLabeller Implements ILabeller Public Sub Run(ByVal result As IIntegrationResult) result.Label = Generate(result) End Sub Public Function Generate(ByVal integrationResult As IIntegrationResult) As String Dim label As String = integrationResult.LastIntegration.Label Return label End Function <ReflectorProperty("prefix", Required:=False)> _ Public Prefix As String = String.Empty End Class End Namespace What am I doing wrong? What have I missed? Background Info: I am using VS2005. I cant use CrusieControl 1.4.4 RC2 (which has an Assembly Labeller) because my source control's plugin (SCM Anywhere) doesnt work with it.

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• getline won't let me type, c++

  - by Stijn

  I try to get the name of a game the users chooses and store it in a vector. I use getline so the user can use a space. When I try to type a new game to add it won't let me. It automaticly displays me games library. Please tell me what I do wrong. Problem is at if(action == "add") Here's my code: #include <iostream> #include <string> #include <vector> #include <algorithm> #include <ctime> #include <cstdlib> using namespace std; int main() { vector<string>::const_iterator myIterator; vector<string>::const_iterator iter; vector<string> games; games.push_back("Crysis 2"); games.push_back("GodOfWar 3"); games.push_back("FIFA 12"); cout <<"Welcome to your Games Library.\n"; cout <<"\nThese are your games:\n"; for (iter = games.begin(); iter != games.end(); ++iter) { cout <<*iter <<endl; } //the loop! string action; string newGame; cout <<"\n-Type 'exit' if you want to quit.\n-Type 'add' if you want to add a game.\n-Type 'delete' if you want to delete a game.\n-Type 'find' if you want to search a game.\n-Type 'game' if you don't know what game to play.\n-Type 'show' if you want to view your library."; while (action != "exit") { cout <<"\n\nWhat do you want to do: "; cin >> action; //problem is here if (action == "add") { cout <<"\nType the name of the game you want to add: "; getline (cin, newGame); games.push_back(newGame); for (iter = games.begin(); iter != games.end(); ++iter) { cout <<*iter <<endl; } continue; } else if (action == "show") { cout <<"\nThese are your games:\n"; for (iter = games.begin(); iter != games.end(); ++iter) { cout <<*iter <<endl; } } else if (action == "delete") { cout <<"Type the name of the game you want to delete: "; cin >> newGame; getline (cin, newGame); iter = find(games.begin(), games.end(), newGame); if(iter != games.end()) { games.erase(iter); cout <<"\nGame deleted!"; } else { cout<<"\nGame not found."; } continue; } else if (action == "find") { cout <<"Which game you want to look for in your library: "; cin >> newGame; getline (cin, newGame); iter = find(games.begin(), games.end(), newGame); if (iter != games.end()) { cout << "Game found.\n"; } else { cout << "Game not found.\n"; } continue; } else if (action == "game") { srand(static_cast<unsigned int>(time(0))); random_shuffle(games.begin(), games.end()); cout << "\nWhy don't you play " << games[0]; continue; } else if (action == "quit") { cout <<"\nRemember to have fun while gaming!!\n"; break; } else { cout <<"\nCommand not found"; } } return 0; }

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• Ruby-on-rails: routing problem: controller action looks for show when it should look for finalize

  - by cbrulak

  background: trying to use the twitter gem for ruby-on-rails. in routes: map.resources :twitter_sessions map.finalize_twitter_sessions 'twitter_sessions/finalize', :controller => 'twitter_sessions', :action => 'finalize' (twitter_sessions is the controller for the twitter sessions in my app). The view has one file new.html.erb and is very simple: <% form_tag(twitter_sessions_path) do |f| %> <p><%= submit_tag "twitter!" %></p> <% end %> and the twitter_sessions_controller.rb: def new end def create oauth.set_callback_url(finalize_twitter_sessions_url) session['rtoken'] = oauth.request_token.token session['rsecret'] = oauth.request_token.secret redirect_to oauth.request_token.authorize_url end def destroy reset_session redirect_to new_session_path end def finalize oauth.authorize_from_request(session['rtoken'], session['rsecret'], params[:oauth_verifier]) profile = Twitter::Base.new(oauth).verify_credentials session['rtoken'] = session['rsecret'] = nil session[:atoken] = oauth.access_token.token session[:asecret] = oauth.access_token.secret sign_in(profile) redirect_back_or root_path end However, after I click the "twitter" button, I get this error: 401 Unauthorized .../gems/oauth-0.3.6/lib/oauth/consumer.rb:200:in `token_request' .../gems/oauth-0.3.6/lib/oauth/consumer.rb:128:in `get_request_token' .../gems/twitter-0.9.2/lib/twitter/oauth.rb:32:in `request_token' .../gems/twitter-0.9.2/lib/twitter/oauth.rb:25:in `set_callback_url' app/controllers/twitter_sessions_controller.rb:7:in `create' If I go to the finalize url, http://localhost:3000/twitter_sessions/finalize, directly, I get this error: Unknown action No action responded to show. Actions: create, destroy, finalize, isLoggedInToBeta, login_required, and new Any ideas? Thanks

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• Dynamically create categories for SQLite pivot/crosstab

  - by alj

  I realise it is possible to create a crosstab within sqlite, but is it possible to dynamically determine the relevant categories/columns at runtime rather than hardcoding them? Given the following example, it can get rather tedious ... SELECT shop_id, sum(CASE WHEN product = 'Fiesta' THEN units END) as Fiesta, sum(CASE WHEN product = 'Focus' THEN units END) as Focus, sum(CASE WHEN product = 'Puma' THEN units END) as Puma, sum(units) AS total FROM sales GROUP BY shop_id I managed to do this in SQLServer in a stored proceedure before and wondered if there was anything equivalent.

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• net/http.rb:560:in `initialize': getaddrinfo: Name or service not known (SocketError)

  - by Sid

  ` @@timestamp = nil def generate_oauth_url @@timestamp = timestamp url = CONNECT_URL + REQUEST_TOKEN_PATH + "&oauth_callback=#{OAUTH_CALLBACK}&oauth_consumer_key=#{OAUTH_CONSUMER_KEY}&oauth_nonce=#{NONCE} &oauth_signature_method=#{OAUTH_SIGNATURE_METHOD}&oauth_timestamp=#{@@timestamp}&oauth_version=#{OAUTH_VERSION}" puts url url end def sign(url) Base64.encode64(HMAC::SHA1.digest((NONCE + url), OAUTH_CONSUMER_SECRET)).strip end def get_request_token url = generate_oauth_url signed_url = sign(url) request = Net::HTTP.new((CONNECT_URL + REQUEST_TOKEN_PATH),80) puts request.inspect headers = { "Authorization" => "Authorization: OAuth oauth_nonce = #{NONCE}, oauth_callback = #{OAUTH_CALLBACK}, oauth_signature_meth od = #{OAUTH_SIGNATURE_METHOD}, oauth_timestamp=#{@@timestamp}, oauth_consumer_key = #{OAUTH_CONSUMER_KEY}, oauth_signature = #{signed_url}, oauth_versio n = #{OAUTH_VERSION}" } request.post(url, nil,headers) end def timestamp Time.now.to_i end ` I am trying to do what oauth does in an attempt to understand how to use the Authorization headers. I am also getting the following error. I am trying to connect to the linkedin API. /usr/lib/ruby/1.8/net/http.rb:560:in 'initialize': getaddrinfo: Name or service not known (SocketError) I would really appreciate it if someone could nudge me in the right direction.

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• Package caption Error: Continued 'figure' after 'table'

  - by Eduardo

  Hello I am having a problem with the numbering of figures using Latex, I am getting this error message: Package caption Error: Continued 'figure' after 'table' This is my code: \begin{table} \centering \subfloat[Tabla1\label{tab:Tabla1}]{ \small \begin{tabular}{ | c | c | c | c | c |} \hline \multicolumn{5}{|c|}{\textbf{Tabla 1}} \\ \hline ... ... \end{tabular} } \qquad \subfloat[Tabla2\label{tab:Tabla2}]{ \small \begin{tabular}{ | c | c | c | c | c |} \hline \multicolumn{5}{|c|}{\textbf{Tabla 2}} \\ \hline ... ... \end{tabular} } \caption{These are tables} \label{tab:Tables} \end{table} \begin{figure} \centering \subfloat[][Figure 1]{\label{fig:fig1}\includegraphics[width = 14cm]{fig1}} \qquad \subfloat[][Figure 2]{\label{fig:fig2}\includegraphics[width = 14cm]{fig2}} \end{figure} \begin{figure}[t] \ContinuedFloat \subfloat[][Figure 2]{\label{fig:fig3}\includegraphics[width = 14cm]{fig3}} \caption{Those are figures} \label{fig:Figures} \end{figure} \newpage What I want to do, it is to have this configuration: Table Table Figure 1 Figure 2 Figure 3 Since Figure 1 and Figure 2 are too big to fit vertically I want the Figure 3 to be alone in another page that's why I have the \ContinuedFloat. Externally looks fine but the problem is the numbering, I am getting for the Figures the number 5.2, that is the same number that a Figure I have before (The correct number should be 5.3). However if I try to reference the figures: \ref{fig:fig1}, \ref{fig:fig2} y \ref{fig:fig2} I get: 5.3a, 5.3b y 5.2c The two first right the last one wrong. I have been stuck with this for hours any ideas?. Thans a lot in advance

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• permutations gone wrong

  - by vbNewbie

  I have written code to implement an algorithm I found on string permutations. What I have is an arraylist of words ( up to 200) and I need to permutate the list in levels of 5. Basically group the string words in fives and permutated them. What I have takes the first 5 words generates the permutations and ignores the rest of the arraylist? Any ideas appreciated. Private Function permute(ByVal chunks As ArrayList, ByVal k As Long) As ArrayList ReDim ItemUsed(k) pno = 0 Permutate(k, 1) Return chunks End Function Private Shared Sub Permutate(ByVal K As Long, ByVal pLevel As Long) Dim i As Long, Perm As String Perm = pString ' Save the current Perm ' for each value currently available For i = 1 To K If Not ItemUsed(i) Then If pLevel = 1 Then pString = chunks.Item(i) 'pString = inChars(i) Else pString = pString & chunks.Item(i) 'pString += inChars(i) End If If pLevel = K Then 'got next Perm pno = pno + 1 SyncLock outfile outfile.WriteLine(pno & " = " & pString & vbCrLf) End SyncLock outfile.Flush() Exit Sub End If ' Mark this item unavailable ItemUsed(i) = True ' gen all Perms at next level Permutate(K, pLevel + 1) ' Mark this item free again ItemUsed(i) = False ' Restore the current Perm pString = Perm End If Next K above is = to 5 for the number of words in one permutation but when I change the for loop to the arraylist size I get an error of index out of bounds

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• How can I reverse a stack?

  - by come pollinate me

  I need to write a VB.NET code to reverse the given characters using a stack. Input: 'S','T','A','C','K' So far I have input the letters, but I don't know how to get the console to reverse it. I'm a beginner to programming so please excuse my ignorance. An explanation as to how it's done would also be greatly appreciated. What I got so far. Module Module1 Sub Main() Dim StackObject As New Stack StackObject.Push("S") Console.WriteLine(StackObject.Peek) StackObject.Push("T") Console.WriteLine(StackObject.Peek) StackObject.Push("A") Console.WriteLine(StackObject.Peek) StackObject.Push("C") Console.WriteLine(StackObject.Peek) StackObject.Push("K") Console.WriteLine(StackObject.Peek) End Sub End Module I just need it to be reversed. I got it!! Module Module1 Sub Main() Dim StackObject As New Stack StackObject.Push("S") StackObject.Push("T") StackObject.Push("A") StackObject.Push("C") StackObject.Push("K") For Each cur As String In StackObject Console.WriteLine(cur) Next End Sub End Module That's how it's done.

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• Add JSON support to Rails app

  - by Meltemi

  I am experimenting with Rails and was wondering what's needed to allow/add support for JSON requests? I have a vanilla installation of Rails 2.3.5 and the default scaffolding seem to provide support for HTML & XML requests but not JSON. class EventsController < ApplicationController # GET /events # GET /events.xml def index @events = Event.all respond_to do |format| format.html # index.html.erb format.xml { render :xml => @events } end end # GET /events/1 # GET /events/1.xml def show @event = Event.find(params[:id]) respond_to do |format| format.html # show.html.erb format.xml { render :xml => @event } end end ... I'm new to this but it would appear as though i would need to add a format line in each method along the lines of: format.js { render :js => @event.json } couldn't this be done automatically? perhaps there's a template somewhere i need to update...or a flag i can set? Or perhaps, and most likely, I've missed the boat entirely?!?

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• How should I manage my many-to-many relationships?

  - by wes

  Hello all, I have a database containing a couple tables: files and users. This relationship is many-to-many, so I also have a table called users_files_ref which holds foreign keys to both of the above tables. Here's the schema of each table: files - file_id, file_name users - user_id, user_name users_files_ref - user_file_ref_id, user_id, file_id I'm using Codeigniter to build a file host application, and I'm right in the middle of adding the functionality that enables users to upload files. This is where I'm running into my problem. Once I add a file to the files table, I will need that new file's id to update the users_files_ref table. Right now I'm adding the record to the files table, and then I imagined I'd run a query to grab the last file added, so that I can get the ID, and then use that ID to insert the new users_files_ref record. I know this will work on a small scale, but I imagine there is a better way of managing these records, especially in a heavy-traffic scenario. I am new to relational database stuff but have been around PHP for a while, so please bear with me here :-) I have primary and foreign keys set up correctly for the files, users, and users_files_ref tables, I'm just wondering how to manage the adding of file records for this scenario? Thanks for any help provided, it's much appreciated. -Wes

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• Feedback on iterating over type-safe enums

  - by Sumant

  In response to the earlier SO question "Enumerate over an enum in C++", I came up with the following reusable solution that uses type-safe enum idiom. I'm just curious to see the community feedback on my solution. This solution makes use of a static array, which is populated using type-safe enum objects before first use. Iteration over enums is then simply reduced to iteration over the array. I'm aware of the fact that this solution won't work if the enumerators are not strictly increasing. template<typename def, typename inner = typename def::type> class safe_enum : public def { typedef typename def::type type; inner val; static safe_enum array[def::end - def::begin]; static bool init; static void initialize() { if(!init) // use double checked locking in case of multi-threading. { unsigned int size = def::end - def::begin; for(unsigned int i = 0, j = def::begin; i < size; ++i, ++j) array[i] = static_cast<typename def::type>(j); init = true; } } public: safe_enum(type v = def::begin) : val(v) {} inner underlying() const { return val; } static safe_enum * begin() { initialize(); return array; } static safe_enum * end() { initialize(); return array + (def::end - def::begin); } bool operator == (const safe_enum & s) const { return this->val == s.val; } bool operator != (const safe_enum & s) const { return this->val != s.val; } bool operator < (const safe_enum & s) const { return this->val < s.val; } bool operator <= (const safe_enum & s) const { return this->val <= s.val; } bool operator > (const safe_enum & s) const { return this->val > s.val; } bool operator >= (const safe_enum & s) const { return this->val >= s.val; } }; template <typename def, typename inner> safe_enum<def, inner> safe_enum<def, inner>::array[def::end - def::begin]; template <typename def, typename inner> bool safe_enum<def, inner>::init = false; struct color_def { enum type { begin, red = begin, green, blue, end }; }; typedef safe_enum<color_def> color; template <class Enum> void f(Enum e) { std::cout << static_cast<unsigned>(e.underlying()) << std::endl; } int main() { std::for_each(color::begin(), color::end(), &f<color>); color c = color::red; }

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• VB .Net - Reflection: Reflected Method from a loaded Assembly executes before calling method. Why?

  - by pu.griffin

  When I am loading an Assembly dynamically, then calling a method from it, I appear to be getting the method from Assembly executing before the code in the method that is calling it. It does not appear to be executing in a Serial manner as I would expect. Can anyone shine some light on why this might be happening. Below is some code to illustrate what I am seeing, the code from the some.dll assembly calls a method named PerformLookup. For testing I put a similar MessageBox type output with "PerformLookup Time: " as the text. What I end up seeing is: First: "PerformLookup Time: 40:842" Second: "initIndex Time: 45:873" Imports System Imports System.Data Imports System.IO Imports Microsoft.VisualBasic.Strings Imports System.Reflection Public Class Class1 Public Function initIndex(indexTable as System.Collections.Hashtable) As System.Data.DataSet Dim writeCode As String MessageBox.Show("initIndex Time: " & Date.Now.Second.ToString() & ":" & Date.Now.Millisecond.ToString()) System.Threading.Thread.Sleep(5000) writeCode = RefreshList() End Function Public Function RefreshList() As String Dim asm As System.Reflection.Assembly Dim t As Type() Dim ty As Type Dim m As MethodInfo() Dim mm As MethodInfo Dim retString as String retString = "" Try asm = System.Reflection.Assembly.LoadFrom("C:\Program Files\some.dll") t = asm.GetTypes() ty = asm.GetType(t(28).FullName) 'known class location m = ty.GetMethods() mm = ty.GetMethod("PerformLookup") Dim o as Object o = Activator.CreateInstance(ty) Dim oo as Object() retString = mm.Invoke(o,Nothing).ToString() Catch Ex As Exception End Try return retString End Function End Class

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