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  • how to deep copy a class without marking it as serializable

    - by Gaddigesh
    I came across many questions on deep copy but non of them helped me I have a class say class A { ... public List<B> ListB; .... } where B is again another class which inturn may inherit/contain some other classes Take this scenario A is a very huge class and contain many reference types I can not mark B as serializable as i don't have access to source code of B(Though I can Mark A as serializable) Problem:below methods to perform deep copy does not work because I can not use Iclonable, memberwise clone technique as class A conatins many reference types I can not write a copy constructor for A , as the class is huge and keeps growing and contained classes (Like B) can't be deep copied I can't use serialization technique as i can not mark conatined class(like B, for which no source code avilaable) as serializable So how can I deep copy the object of Class A? (I read about "surrogate serialization" technique some where but not clear)

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  • Need to preserve order of elements sent in JSON from Java

    - by Kush
    I'm using JSON.org APIs for Java to use JSON in my JSP webapp, I know JSONObject doesn't preserve order of elements the way they are put into it and one has to use JSONArray for that but I don't know how to use it since I need to send key and value both as received from the database, and here I'm sending data to jQuery via JSON where I need the order of data to be maintained. Following is my servlet code, where I'm getting results from the database using ORDER BY and hence I want the order to be exact as returned from the database. Also this JSON object requested using $.post method of jQuery and is used to populate dropdown on reciever page. ResultSet rs = st.executeQuery("SELECT * FROM tbl_state order by state_name"); JSONObject options = new JSONObject(); while(rs.next()) options.put(rs.getString("state_id"),rs.getString("state_name")); response.setContentType("application/json"); response.setCharacterEncoding("UTF-8"); response.getWriter().write(options); Thanks.

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  • External XMPP component - Anyone know a Tutorial or Open Source Example please?

    - by gav
    Hi All, I want to run an XMPP server (Openfire) and register an external component to handle the messages it will recieve (using the Whack library). The external component will run my game logic and I will be using XMPP to send player moves to the server and status updates in the other direction. The bonus with XMPP is that we get built in chat for free. The trouble is, although Ignite look fairly established, I can't find a tutorial on how to write, register and debug an External XMPP component written with Whack, there are very few in general for that matter. I am not invested in either the server implementation or the External Component library, java is just my language of choice. If I was to move to Erlang or Scala or something it would have to be a very simple in that language. A single tutorial or example would go a long way here, I just need an basic External XMPP component pretty please! Kind regards, Gavin

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  • How to add a whole directory or project output to WiX package

    - by Coincoin
    We decided to switch from VS integrated setup to WiX. However, what we currently do is use projects output files as the input for the setup project. This lets us easily add Application Files to a directory (for images, samples, and other resources...) and those files are automatically added to the setup when we build. I could not find any similar feature in WiX. WiX seems to require one Directory entry and one File entry for each and every directory and file. This would require us to change the WiX source everytime a file is added which, to my eyes, is prohibitive since we have so many of them. Is there any integrated way of doing that with WiX or do I have to write my own task that will create a WiX source before calling candle?

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  • What is a Perl regex for finding the first non-consecutively-repeating character in a string.

    - by DVK
    Your task, should you choose to accept it, is to write a Perl regular expression that for a given string, will return the first occurence of a character that is not consecutively duplicated. In other words, both preceded AND succeeded by characters different from itself (or start/end of string respectively). Example: IN: aabbcdecc OUT: c Please note that "not consecutively duplicated" does not mean "anywhere in the string". NOTE: it must be a pure regex expression. E.g. the solution that obviously comes to mind (clone the string, delete all the duplicates, and print the first remaining character) does not count, although it solves the problem. The question is inspired by my somewhat off-topic answer to this: http://stackoverflow.com/questions/2548606/perl-function-to-find-first-non-repeating-character-in-a-string

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  • Python's subprocess.Popen object hangs gathering child output when child process does not exit

    - by Daniel Miles
    When a process exits abnormally or not at all, I still want to be able to gather what output it may have generated up until that point. The obvious solution to this example code is to kill the child process with an os.kill, but in my real code, the child is hung waiting for NFS and does not respond to a SIGKILL. #!/usr/bin/python import subprocess import os import time import signal import sys child_script = """ #!/bin/bash i=0 while [ 1 ]; do echo "output line $i" i=$(expr $i \+ 1) sleep 1 done """ childFile = open("/tmp/childProc.sh", 'w') childFile.write(child_script) childFile.close() cmd = ["bash", "/tmp/childProc.sh"] finish = time.time() + 3 p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, stdin=subprocess.PIPE) while p.poll() is None: time.sleep(0.05) if finish < time.time(): print "timed out and killed child, collecting what output exists so far" out, err = p.communicate() print "got it" sys.exit(0) In this case, the print statement about timing out appears and the python script never exits or progresses. Does anybody know how I can do this differently and still get output from my child processe

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  • Are xlrd and xlwt compatible?

    - by Leo
    I'm trying to create a workbook with python and I need to test the values of different cells to fill it but I'm having some troubles. I use xlrd and xlwt to create and edit the excel file. I've made a little example of my problem and I don't understand why it's not working. import xlwt import xlrd wb = xlwt.Workbook() ws = wb.add_sheet('Test') ws.write(0,0,"ah") cell = ws.cell(0,0) # AttributeError: 'Worksheet' object has no attribute 'cell' print cell.value I had taken for granted that xlrd and xlwt have shared classes which can interact with each other but it doesn't seem to be the case. How do I get the cell value of an open Worksheet object?

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  • Style: Dot notation vs. message notation in Objective-C 2.0

    - by groundhog
    In Objective-C 2.0 we got the "dot" notation for properties. I've seen various back and forths about the merits of dot notation vs. message notation. To keep the responses untainted I'm not going to respond either way in the question. What is your thought about dot notation vs. message notation for property accessing? Please try to keep it focused on Objective-C - my one bias I'll put forth is that Objective-C is Objective-C, so your preference that it be like Java or JavaScript aren't valid. Valid commentary is to do with technical issues (operation ordering, cast precedence, performance, etc), clarity (structure vs. object nature, both pro and con!), succinctness, etc. Note, I'm of the school of rigorous quality and readability in code having worked on huge projects where code convention and quality is paramount (the write once read a thousand times paradigm).

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  • How do I automate navigation to a website that requires authentication?

    - by Wiz
    Here's what I'm trying to achieve. I would like to write a script that will navigate to a website that requires me to be authenticated as myself, say Facebook, Live Spaces, Twitter or any other, and then have that script search for certain information on one of the pages of the website. I've done something similar in the past with the Windows.Forms WebBrowser control, which is a full blown implementation of IE that can be controlled through code and will store whatever cookies you get once you're authenticated, but it was very unfriendly to modify and I was hoping to use a scripting language instead, maybe Powershell or something of that sort. Are there maybe some good tutorials about this out there on the web? Thanks!

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  • jQuery animation queues

    - by OneNerd
    I am at a dead end, so hoping you jQuery gurus can help. I have a total of 10 elements (actually small images) on a page. I need to animate them like this: first 2 show up then the next 2 show up then the next 3 show up then the next 1 shows up then the last 2 show up So, I have added attributes to each one (sequence_num = "1" (or 2 or 3 etc) so I can easily choose via the $() which ones to animate using the animate() function.) My goal is to write a function that does the animation (I can do that - i think i have grasped the animate() function). What I am getting stuck on is how to delay the animation so the proper groups of objects are animated in before the next group starts. I have tried the queue parameter of the animate() function, but that doesn't seem to work for what I am trying to do. Does anyone have any experience with this?

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  • Bad Practice requiring file within a model?

    - by Lee Marshall
    I have built an MVC php application and was wondering, if instead of having to write out a large amount of html and set the data, could I not just have all this html (with some php) in a separate file and just require it? For example: $test = '<div> Test content <div>More content</div> </div>'; $APP->Template->setData('test', $test, FALSE); Instead could I not just use: $test = require("includes/content.php"); $APP->Template->setData('test', $test, FALSE); Would this be considered as bad practise? It just seems that by requiring files, it can shorten the length of controllers. Would be good to get anybodies advice on this matter.

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  • Running a custom VirtualPathProvider with a PreCompiled website

    - by epilog
    Hi, currently I have a custom VirtualPathProvider in a Asp.net MVC web application. This VirtualPathProvider checks the Area from the route "/{Area}/{Controller}/..." and uses the NameSpace.{Area}.Main.dll module to return the views that are contained in that assembly as Embedded Resources. This works great and I don't have to deploy any ascx, js, css files. Now my problem is this: I would like to precompile the aspx and ascx files in the assembly and instead of having the views as embedded resources I would have the view class with all the Response.Write and dings and dongs. I can precompile the views using the aspnet_compiler but I keep getting an error when ever the ViewEngine tries to find the view and fails. My main goal is to have a way for the first time usage of a certain view/usercontrol would be faster and don't wait for the compilation to happen. This is a requirement since the application could be grouped into plugins and this plugins be deployed into the Bin directory. Any thoughts? With best regards Carlos Sobrinho

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  • HQL recursion, how do I do this?

    - by niklassaers
    Hi guys, I have a tree structure where each Node has a parent and a Set<Node> children. Each Node has a String title, and I want to make a query where I select Set<String> titles, being the title of this node and of all parent nodes. How do I write this query? The query for a single title is this, but like I said, I'd like it expanded for the entire branch of parents. SELECT node.title FROM Node node WHERE node.id = :id Cheers Nik

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  • Best way to represent Bit Arrays in C#??

    - by divinci
    Hi all, I am currently building a DHCPMessage class in c#. RFC is available here : http://www.faqs.org/rfcs/rfc2131.html Pseudo public object DHCPMessage { bool[8] op; bool[8] htype; bool[8] hlen; bool[8] hops; bool[32] xid; bool[16] secs; bool[16] flags; bool[32] ciaddr; bool[32] yiaddr; bool[32] siaddr; bool[32] giaddr; bool[128] chaddr; bool[512] sname; bool[1024] file; bool[] options; } If we imagine that each field is a fixed length bit array, what is : The most versitile Best practice way of representing this as a class??? OR.. how would you write this? :)

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  • Print "1 followed by googolplex number of zeros" [closed]

    - by Rajan
    Assuming we are not concerned about running time of the program (which is practically infinite for human mortals), we want to print out in base 10, the exact value of 10^(googolplex), one digit at a time (mostly zeros). Describe an algorithm (which can be coded on current day computers), or write a program to do this. Since we cannot practically check the output, so we will rely on collective opinion on the correctness of the program. NOTE : I do not know the solution, or whether a solution exists or not. The problem is my own invention. To those readers who think this is not a CS question... kindly reconsider. This is difficult and bit theoretical but definitely CS.

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  • C# UTF8 output keep encoded characters intact

    - by Stefan Pohl
    Hello, i have a very simple question I can't seem to get my head around. I have a properly encoded UTF8-String I parse into a JObject with Json.NET, fiddle around with some values and write it to the commandline, keeping the encoded characters intact. Everything works great except for the keeping the encoded characters intact part. Code: var json = "{roster: [[\"Tulg\u00f4r\", 990, 1055]]}"; var j = JObject.Parse(json); for (int i = 0; i < j["roster"].Count(); i++) { j["roster"][i][1] = ((int)j["roster"][i][1]) * 3; j["roster"][i][2] = ((int)j["roster"][i][2]) * 3; } Console.WriteLine(JsonConvert.SerializeObject(j, Formatting.None)); Actual Output: {"roster":[["Tulgôr",2970,3165]]} Desired Output: {"roster":[["Tulg\u00f4r",2970,3165]]} It seems like my phrasing in Google is inappropriate since nothing useful came up. I'm sure it's something uber-easy and i will feel pretty stupid afterwards. :)

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  • Documenting user scenarios and measuring/testing

    - by Rimian
    Please forgive me as I don't quite remember the exact terms for what I am talking about... hence my question. Recently I worked on a large Agile team where I encountered a method of defining user scenarios (much like user stories). These scenarios were a few very basic short sentences with keywords and a structure that could be understood by humans (especially project managers) and could also be coded against using some Java Framework (for verifying tests). The exact structure of this mini language used keywords like "when" and "and" or "if" which was how the framework parsed and verified the result. The purpose of this framework was to interface between management and the acceptance testing framework. So essentially management could write the tests themselves using English. The scenario went something like this: "When a user visits URL and User clicks on X Something happens (that can be measured)" Can anyone help me remember exactly what I am talking about? Many thanks

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  • Linq - How to query specific columns and return a lists

    - by Billy Logan
    Hello Everyone, I am trying to write a linq query that will only return certain columns from my entity object into a list object. Below is my code which produces an error(can't implicitly convert a generic list of anonymous types to a generic list of type TBLPROMOTION): List<TBLPROMOTION> promotionInfo = null; promotionInfo = (from p in matches orderby p.PROMOTION_NM descending select new { p.EFFECTIVE_DT, p.EXPIRE_DT, p.IS_ACTIVE, p.PROMOTION_DESC, p.PROMOTION_ID, p.PROMOTION_NM }).ToList(); What would be the best way to accomplish this. I do not want to do a "select p" in this case and return all the columns associated with the query. thanks in advance, Billy

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  • PageMethods security

    - by TenaciousImpy
    Hi, I'm trying to 'AJAX-ify' my site in order to improve the UI experience. In terms of performance, I'm also trying to get rid of the UpdatePanel. I've come across a great article over at Encosia showing a way of posting using PageMethods. My question is, how secure are page methods in a production environment? Being public, can anyone create a JSON script to POST directly to the server, or are there cross-domain checks taking place? My PageMethods would also write the data into the database (after filtering). I'm using Forms Authentication in my pages and, on page load, it redirects unauthenticated users to the login page. Would the Page Methods on this page also need to check authentication if the user POSTs directly to the method, or is that authentication inherited for the entire page? (Essentially, does the entire page cycle occur even if a user has managed to post only to the PageMethod)? Thanks

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  • Detect and record a sound with python

    - by Jean-Pierre
    I'm using this program to record a sound in python: import pyaudio import wave import sys chunk = 1024 FORMAT = pyaudio.paInt16 CHANNELS = 1 RATE = 44100 RECORD_SECONDS = 5 WAVE_OUTPUT_FILENAME = "output.wav" p = pyaudio.PyAudio() stream = p.open(format = FORMAT, channels = CHANNELS, rate = RATE, input = True, frames_per_buffer = chunk) print "* recording" all = [] for i in range(0, RATE / chunk * RECORD_SECONDS): data = stream.read(chunk) all.append(data) print "* done recording" stream.close() p.terminate() write data to WAVE file data = ''.join(all) wf = wave.open(WAVE_OUTPUT_FILENAME, 'wb') wf.setnchannels(CHANNELS) wf.setsampwidth(p.get_sample_size(FORMAT)) wf.setframerate(RATE) wf.writeframes(data) wf.close() I want to change the program to start recording when sound is detected by the sound card input. Probably should compare the input sound level in Chunk, but how do this?

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  • Wordpress form handling

    - by Ron
    I need to add a basic form page in the website, that runs on WordPress framework. I have the following raw materials ready: Client side: html form layout,css and jquery validation code. Server side: form handler php function that processes the $_POST[] data. My problem is to integrate this code in the Wordpress framework. I have looked at some plugins but they are doing much more than I would like and also they have their own validation which is cumbersome to change. Could anyone suggest a good form plugin that allows just the framework hooks ? Or is it worthwhile that I should write the plugin myself. Thanks.

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  • How can I overwrite a System.Drawing.Bitmap onto an existing GDI bitmap?

    - by MusiGenesis
    If I have a .Net Bitmap, I can create from it a GDI bitmap by calling the Bitmap's GetHbitmap() method. Bitmap bmp = new Bitmap(100, 100); IntPtr gdiBmp = bmp.GetHbitmap(); This works fine, but every time you call GetHbitmap, Windows has to allocate new memory for the object that gdiBmp references. What I'd like to do - if possible - is write a function (I know PInvoke will be necessary here) that also generates a GDI bitmap copy of a Bitmap, but that uses an existing object instead of allocating a new one. So it would look something like this (if it were an extension method of Bitmap): //void OverwriteHbitmap(IntPtr gdi) Bitmap bmp1 = new Bitmap(100, 100); IntPtr gdi1 = bmp1.GetHbitmap(); Bitmap bmp2 = new Bitmap(100, 100); bmp2.OverwriteHbitmap(gdi1); How can I do this? I assume I'll need to know the structure of a GDI bitmap, and probably I can use LockBits and BitmapData for this, but I'm not sure exactly how.

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  • named groups splitting regardless of position of match

    - by jeremy
    Having a hard time explaining what I mean, so here is what I want to do I want any sentenced to be parsed along the pattern of text #something a few words [someothertext] for this, the matching sentence would be Jeremy is trying #20 times to [understand this] And I would name 4 groups, as text, time, who, subtitle However, I could also write #20 Jeremy is trying [understand this] times to and still get the tokens #20 Jeremy is trying times to understand this corresponding to the right groups As long as the delimited tokens can separate the 2 text only tokens, I'm fine. Is this even possible? I've tried a few regex's and failed miserably (am still experimenting but finding myself spending way too much time learning it)

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  • Does Javascript/EcmaScript3 support ISO8601 date parsing?

    - by AlexanderN
    How are you currently parsing ISO8601 dates e.g. 2010-02-23T23:04:48Z in JavaScript? Some browsers return NaN (including Chrome) when using the code below, FF3.6+ works though. <html> <body> <script type="text/javascript"> var d = Date.parse("2010-02-23T23:04:48Z"); document.write(d); </script> </body> </html> You can try this here http://www.w3schools.com/jsref/tryit.asp?filename=tryjsref_parse ps: DateJs doesn't seem to support ISO8601 parsing.

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  • How to create a web framework in C# without ASPX?

    - by Mark
    I've managed to get a C# asp page running under ubuntu/apache/mono, but I don't want to write my framework in these ASP pages, I want to use straight C# and then I'll use a templating language for my views. But I don't know where to begin? C# is a compiled language, so... how would I do this? Would I compile everything and then have apache hook into the (single) executable and pass in the the request URL? Could I request specific .cs pages and then have apache tell it to compile and then "display" it only if it's been updated? Can the "view" files be compiled individually to avoid having to recompile everything every time there's a change? Is there some "base" I can work from, or am I going to have to reinvent accessing GET and POST variables (by reading header info) and all sorts of other stuff we take for granted in languages like PHP?

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