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  • How to Pass Parameters to Activator.CreateInstance<T>()

    - by DaveDev
    Hi guys I want to create an instance of a type that I specify in a generic method that I have. This type has a number of overloaded constructors. I'd like to be able to pass arguments to the constructors, but Activator.CreateInstance<T>() doesn't see to have this as an option. Is there another way to do it? Thanks Dave

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  • ideas for a distributed cache proxy server

    - by Neeraj
    Hi everyone! I am implementing, a distributed cache proxy server.I have an idea of the HTTP and related stuff, so i am rather concentrating on the sub part "Distributed data storage". From some search on web i found that this could be done using Distributed Hash Tables(DHT). I was wondering if there exists some kind of library for this preferably in C/C++. Any better suggestions for the same will also be appreciated.

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  • NHibernate: inserting additional calculated column

    - by Andrey Shchekin
    What would be your approach with NHibernate to do the following: When Comment is inserted into DB, and its property Text is inserted into column Text (due to a mapping), insert into column TextHash a hash of this property value. It seems trivial if I map TextHash, but how should I do this without mapping it? I do not need it in the domain model, its a DB-level optimization (I would use computed HashBytes if not for the length limit).

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  • printf and formatting rules

    - by Stringer Bell
    I'd like to know if all formatting rules of printf functions currently work (or are implemented) in F# ? For instance, if I want to align arguments on 9 characters (padding with spaces or 0), I would use: printfn "%9A %9A" arg1 arg2 //don't seem to work Thanks!

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  • How to implement email correlation with subject and body modification?

    - by Neuquino
    I have a system that sends mail. I have a system that receives mail. I need to identify that a received mail correlates with the one the other system sent. The particular thing here is that either the subject or the body can be modified. I thought on putting some hash in the header of the sent email, but I don't know where this could be added Don't you have any clue?

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  • Androids Facebook SDK, single sign on question?

    - by Joakim Engstrom
    On Androids Facebook SDK there is a single login feature which I can't get to work. Done all the key hash thing but maybe there is something wrong with this method. What exactly should I pass on, or could somebody explain what this is supposed to do? @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { facebook.authorizeCallback(requestCode, resultCode, data); }

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  • Using auto-generated event handler in both class and it's superclass

    - by abatishchev
    I have a abstract class: public abstract class MySuperControl : UserControl { protected void Page_PreRender(object sender, EventArgs e) { // do something in super } } and a class that is code-behind for a designed UserControl: public partial class MyControl : MySuperControl { protected void Page_PreRender(object sender, EventArgs e) { // do something in class } } how do declare both of them to nest automated call?

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  • Why does Chrome not start correctly when using C# Process.Start?

    - by nbolton
    I'm able to start Chrome successfully using this C# code: Process.Start("chrome", "http://www.google.co.uk"); However, it does two things wrong: It does not navigate to the URL specified in arguments It does not re-use the existing Chrome window (it opens a new one) I've tried using ProcessStartInfo and setting UseShellExecute and LoadUserProfile just in case these did something, but this makes no difference. Any ideas?

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  • Lazy loading Javascript, object not created from IE8 cache

    - by doum-ti-di-li-doom
    Unfortunately the bug does not happen outside of my application! Scenario index.php <?php header('Expires: Mon, 26 Jul 1997 05:00:00 GMT'); header('Last-Modified: '.gmdate('D, d M Y H:i:s').'GMT'); header('Cache-Control: no-cache, must-revalidate'); header('Pragma: no-cache'); ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8" /> <title>Lazy loader</title> </head> <body> ... <script type="text/javascript" src="internal.js"></script> ... </body> </html> internal.js myApp = { timerHitIt: false, hitIt: function () { if (arguments.callee.done) { return; } arguments.callee.done = true; if (myApp.timerHitIt) { clearInterval(myApp.timerHitIt); } var elt = document.createElement("script"); elt.async = true; elt.type = "text/javascript"; elt.src = "external.js"; elt.onload = elt.onreadystatechange = function () { alert(typeof(something)); } document.body.appendChild(elt); } } if (document.addEventListener) { document.addEventListener("DOMContentLoaded", myApp.hitIt, false); } /*@cc_on @*/ /*@if (@_win32) document.write("<script id=__ie_onload defer src="+((location.protocol == "https:") ? "//:" : "javascript:void(0)")+"><\/script>"); document.getElementById("__ie_onload").onreadystatechange = function () { if (this.readyState == "complete") { myApp.hitIt(); } }; /*@end @*/ if (/WebKit/i.test(navigator.userAgent)) { timerHitIt = setInterval(function () { if (/loaded|complete/.test(document.readyState)) { myApp.hitIt(); } }, 10); } window.onload = myApp.hitIt; external.js something = {}; alert(true); Valid results are undefined - true - object (± new request) true - object (± cached javascript) But sometimes, when hitting F5, I get true - undefined Does anyone have a clue why alert(true) is executed but something is not set?

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  • Associated models in Rails?

    - by dannymcc
    Hi Everyone, In my rails application I have two models called Kases and Notes. They work in the same way comments do with blog posts, I.e. each Kase entry can have multiple notes attached to it. I have got everything working, but for some reason I cannot get the destroy link to work for the Notes. I think I am overlooking something that is different with associated models to standard models. Notes Controller class NotesController < ApplicationController # POST /notes # POST /notes.xml def create @kase = Kase.find(params[:kase_id]) @note = @kase.notes.create!(params[:note]) respond_to do |format| format.html { redirect_to @kase } format.js end end end Kase Model class Kase < ActiveRecord::Base validates_presence_of :jobno has_many :notes Note Model class Note < ActiveRecord::Base belongs_to :kase end In the Kase show view I call a partial within /notes called _notes.html.erb: Kase Show View <div id="notes"> <h2>Notes</h2> <%= render :partial => @kase.notes %> <% form_for [@kase, Note.new] do |f| %> <p> <h3>Add a new note</h3> <%= f.text_field :body %><%= f.submit "Add Note" %> </p> <% end %> </div> /notes/_note.html.erb <% div_for note do %> <div id="sub-notes"> <p> <%= h(note.body) %><br /> <span style="font-size:smaller">Created <%= time_ago_in_words(note.created_at) %> ago on <%= note.created_at %></span> </p> <%= link_to "Remove Note", kase_path(@kase), :confirm => 'Are you sure?', :method => :delete, :class => 'important' %> </div> <% end %> As you can see, I have a Remove Note destroy link, but that destroys the entire Kase the note is associated with. How do I make the destroy link remove only the note? <%= link_to "Remove Note", kase_path(@kase), :confirm => 'Are you sure?', :method => :delete, :class => 'important' %> Any help would, as always, be greatly appreciated! Thanks, Danny

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  • How can I await the first completed async task of a list in .Net?

    - by Eyal
    My input is a long list of files located on an Amazon S3 server. I'd like to download the metadata of the files, compute the hashes of the local files, and compare the metadata hash with the local files' hash. Currently, I use a loop to start all the metadata downloads asynchronously, then as each completes, compute MD5 on the local file if needed and compare. Here's the code (just the relevant lines): Dim s3client As New AmazonS3Client(KeyId.Text, keySecret.Text) Dim responseTasks As New List(Of System.Tuple(Of ListViewItem, Task(Of GetObjectMetadataResponse))) For Each lvi As ListViewItem In lvStatus.Items Dim gomr As New Amazon.S3.Model.GetObjectMetadataRequest gomr.BucketName = S3FileDialog.GetBucketName(lvi.SubItems(2).Text) gomr.Key = S3FileDialog.GetPrefix(lvi.SubItems(2).Text) responseTasks.Add(New System.Tuple(Of ListViewItem, Task(Of GetObjectMetadataResponse))(lvi, s3client.GetObjectMetadataAsync(gomr))) Next For Each t As System.Tuple(Of ListViewItem, Task(Of GetObjectMetadataResponse)) In responseTasks Dim response As GetObjectMetadataResponse = Await t.Item2 If response.ETag.Trim(""""c) = MD5CalcFile(lvi.SubItems(1).Text) Then lvi.SubItems(3).Text = "Match" UpdateLvi(lvi) End If Next I've got two problems: I'm awaiting the reponses in the order that I made them. I'd rather process them in the order that they complete so that I get them faster. The MD5 calculation is long and synchronous. I tried making it async but the process locked up. I think that the MD5 task was added to the end of .Net's task list and it didn't get to run until all the downloads completed. Ideally, I process the response as they arrive, not in order, and the MD5 is asynchronous but gets a chance to run. Edit: Incorporating WhenAll, it looks like this now: Dim s3client As New Amazon.S3.AmazonS3Client(KeyId.Text, keySecret.Text) Dim responseTasks As New Dictionary(Of Task(Of GetObjectMetadataResponse), ListViewItem) For Each lvi As ListViewItem In lvStatus.Items Dim gomr As New Amazon.S3.Model.GetObjectMetadataRequest gomr.BucketName = S3FileDialog.GetBucketName(lvi.SubItems(2).Text) gomr.Key = S3FileDialog.GetPrefix(lvi.SubItems(2).Text) responseTasks.Add(s3client.GetObjectMetadataAsync(gomr), lvi) Next Dim startTime As DateTimeOffset = DateTimeOffset.Now Do While responseTasks.Count > 0 Dim currentTask As Task(Of GetObjectMetadataResponse) = Await Task.WhenAny(responseTasks.Keys) Dim response As GetObjectMetadataResponse = Await currentTask If response.ETag.Trim(""""c) = MD5CalcFile(lvi.SubItems(1).Text) Then lvi.SubItems(3).Text = "Match" UpdateLvi(lvi) End If Loop MsgBox((DateTimeOffset.Now - startTime).ToString) The UI locks up momentarily whenever MDSCalcFile is done. The whole loop takes about 45s and the first file's MD5 result happens within 1s of starting. If I change the line to: If response.ETag.Trim(""""c) = Await Task.Run(Function () MD5CalcFile(lvi.SubItems(1).Text)) Then The UI doesn't lock up when MD5CalcFile is done. The whole loop takes about 75s, up from 45s, and the first file's MD5 result happens after 40s of waiting.

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  • How do you sort a C# dictionary by value?

    - by kurious
    I often have a Dictionary of keys & values and need to sort it by value. For example, I have a hash of words and their frequencies, and want to order them by frequency. There's SortedList which is good for a single value (frequency), but I want to map it back to the word. SortedDictionary orders by key, not value. Some resort to a custom class, but what's the cleanest way?

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  • All possible permutations of a set of lists in Python

    - by Ian Davis
    In Python I have a list of n lists, each with a variable number of elements. How can I create a single list containing all the possible permutations: For example [ [ a, b, c], [d], [e, f] ] I want [ [a, d, e] , [a, d, f], [b, d, e], [b, d, f], [c, d, e], [c, d, f] ] Note I don't know n in advance. I thought itertools.product would be the right approach but it requires me to know the number of arguments in advance

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  • Fast ArgumentNullException with attributes. It is possible?

    - by Fraga
    Hi. Is there any fast way to verify null arguments via attributes or something? Convert this: public void Method(type arg1,type arg2,type arg3) { if (arg1== null) throw new ArgumentNullException("arg1"); if (arg2== null) throw new ArgumentNullException("arg2"); if (arg3== null) throw new ArgumentNullException("arg3"); //Business Logic } Into something like this: [VerifyNullArgument("arg1","arg2","arg3")] public void Method(type arg1,type arg2,type arg3) { //Business Logic } Ideas? thanks guys.

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  • Is frozenset adequate for caching of symmetric input data in a python dict?

    - by Debilski
    The title more or less says it all: I have a function which takes symmetric input in two arguments, e.g. something like def f(a1, a2): return heavy_stuff(abs(a1 - a2)) Now, I want to introduce some caching method. Would it be correct / pythonic / reasonably efficient to do something like this: cache = {} def g(a1, a2): return cache.setdefault(frozenset((tuple(a1), tuple(a2))), f(a1, a2)) Or would there be some better way?

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  • php POST and non-english language passes empty

    - by haim evgi
    I'm trying to program a Hebrew site with a search option. I am using php 5 with Apache 2.2, on a Debian 5 (Lenny) with appropriate code pages enabled. I am using _POST to pass arguments to a script. If I pass English word to the script everything works, but when I use Hebrew nothing is passed through the POST function. When I use ECHO to show _POST, the variable is empty. What might be the problem?

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