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  • data grid in flex 3

    - by Madhu
    I have initially two data grids,a button and a list.. If i select one item in grid one and second in grid 2 and after clicking the button the details should be displayed on the list depending upon the selection.presently iam not dealing with the data base. iam doing it stand alone.

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  • Fresher in Linux administration [closed]

    - by user127452
    i am fresher in the administration field & i just got the job as a linux support executive,though i have basic knowledge of linux .. the server handling,configuring & network related issues are a new part for me.So i am confuse for where to start with the basic requirement that linux admin should know & how to & from where to study about it .. we hav a 6 working days for +9 hours each ..so it is not possible to join any RHCE course or classes .. so please help me regarding to this issue as the there was no proper handoff is done from previous employer ... & now there is a lot work pressure on me ... so please suggest me something ... :)

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  • Rails 3.0 method_missing: undefined method in validator

    - by user567592
    == Schema Information Schema version: 20110111000403 # Table name: places # id :integer not null, primary key name :string(255) latitude :float longitude :float a place can be defined by latitude and longitude or by name # class Place < ActiveRecord::Base validates_precence_of :name, :if = lat_long_not_def? def lat_long_not_def? latitude.blank? || longitude.blank? end end

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  • When to use reflection to convert datarow to an object

    - by Daniel McNulty
    I'm in a situation now were I need to convert a datarow I've fetched from a query into a new instance of an object. I can do the obvious looping through columns and 'manually' assign these to properties of the object - or I can look into reflection such as this: http://www.codeproject.com/Articles/11914/Using-Reflection-to-convert-DataRows-to-objects-or What would I base the decision on? Just scalability??

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  • How do I achieve virtual attributes in CakePHP (using code, not SQL) as implemented in Ruby on Rails

    - by ash
    Source: http://asciicasts.com/episodes/16-virtual-attributes I'd like to achieve a similar setup as below, but in CakePHP and where the virtual attributes are created using code, not SQL (as documented at http://book.cakephp.org/view/1070/Additional-Methods-and-Properties#Using-virtualFields-1590). class User < ActiveRecord::Base # Getter def full_name [first_name, last_name].join(' ') end # Setter def full_name=(name) split = name.split(' ', 2) self.first_name = split.first self.last_name = split.last end end

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  • Gaussian filter in Matlab

    - by md86
    Does the 'gaussian' filter in MatLab convolve the image with the Gaussian kernel? Also, how do you choose the parameters hsize (size of filter) and sigma? What do you base it on? etc

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  • Features of Emacs that are complementary to Vim?

    - by redacted
    I've been using Vim extensively for a while now, and I really enjoy working with it. However, I keep reading praises for Emacs. I've decided to take a look at Emacs to round out my knowledge of the Unix editors (not to mention Emacs keybindings are used extensively). But! I'm happy doing most of my daily work in Vim. So ideally what I'd like is to look at (apart from basics) are the gaps that Emacs can fill, or things that it can just do better than Vim. I suppose the canonical example is Lisp/Scheme coding in Emacs versus Vim. Where would you start tinkering with Emacs to really appreciate its power, and to get a good idea of how its approach to editing differs from Vim, and how the editors can complement each other? What would be a good introduction in the same vein?

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  • A unique identifier for a Domain

    - by jchoover
    I asked a question over on StackOverflow and was directed to ask a related one here to see if I could get any additional input. Basically, I am looking to have my application aware of what domain it's running under, if any at all. (I want to expose certain debugging facilities only in house, and due to our deployment model it isn't possible to have a different build.) Since I am over paranoid, I didn't want to just rely on the domain name to ensure we are in house. As such I noted the DOMAIN_CONTROLLER_INFO (http://msdn.microsoft.com/en-us/library/ms675912(v=vs.85).aspx ) returned from DsGetDcName (http://msdn.microsoft.com/en-us/library/ms675983(v=vs.85).aspx) has a GUID associated with it, however I can find little if any information on it. I am assuming this GUID is generated at the time the first DC in a domain is created, and that it would live on for the life of the domain. Does anyone else have any inner knowledge and would be kind enough to confirm or deny my assumptions?

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  • Using Git or Mercurial, how would you know when you do a clone or a pull, no one is checking in file

    - by Jian Lin
    Using Git or Mercurial, how would you know when you do a clone or a pull, no one is checking in files (pushing it)? It can be important that: 1) You never know it is in an inconsistent state, so you try for 2 hours trying to debug the code for what's wrong. 2) With all the framework code -- potentially hundreds of files -- if some files are inconsistent with the other, can't the rake db:migrate or script/generate controller cause some damage or inconsistencies to the code base?

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  • Overriding inherited generic methods

    - by jess
    I have this code in base class protected virtual bool HasAnyStuff<TObject>(TObject obj) where TObject:class { return false; } In child class I am overriding protected override bool HasAnyStuff<Customer>(Customer obj) { //some stuff if Customer.sth etc return false; } I am getting this error '''Type parameter declaration must be an identifier not a type''' What is it I am doing wrong here?

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  • Can I Have Polymorphic Containers With Value Semantics in C++11?

    - by John Dibling
    This is a sequel to a related post which asked the eternal question: Can I have polymorphic containers with value semantics in C++? The question was asked slightly incorrectly. It should have been more like: Can I have STL containers of a base type stored by-value in which the elements exhibit polymorphic behavior? If you are asking the question in terms of C++, the answer is "no." At some point, you will slice objects stored by-value. Now I ask the question again, but strictly in terms of C++11. With the changes to the language and the standard libraries, is it now possible to store polymorphic objects by value in an STL container? I'm well aware of the possibility of storing a smart pointer to the base class in the container -- this is not what I'm looking for, as I'm trying to construct objects on the stack without using new. Consider if you will (from the linked post) as basic C++ example: #include <iostream> using namespace std; class Parent { public: Parent() : parent_mem(1) {} virtual void write() { cout << "Parent: " << parent_mem << endl; } int parent_mem; }; class Child : public Parent { public: Child() : child_mem(2) { parent_mem = 2; } void write() { cout << "Child: " << parent_mem << ", " << child_mem << endl; } int child_mem; }; int main(int, char**) { // I can have a polymorphic container with pointer semantics vector<Parent*> pointerVec; pointerVec.push_back(new Parent()); pointerVec.push_back(new Child()); pointerVec[0]->write(); pointerVec[1]->write(); // Output: // // Parent: 1 // Child: 2, 2 // But I can't do it with value semantics vector<Parent> valueVec; valueVec.push_back(Parent()); valueVec.push_back(Child()); // gets turned into a Parent object :( valueVec[0].write(); valueVec[1].write(); // Output: // // Parent: 1 // Parent: 2 }

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  • Data extract from website URL

    - by user2522395
    From this below script I am able to extract all links of particular website, But i need to know how I can generate data from extracted links especially like eMail, Phone number if its there Please help how i will modify the existing script and get the result or if you have full sample script please provide me. Private Sub btnGo_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnGo.Click 'url must be in this format: http://www.example.com/ Dim aList As ArrayList = Spider("http://www.qatarliving.com", 1) For Each url As String In aList lstUrls.Items.Add(url) Next End Sub Private Function Spider(ByVal url As String, ByVal depth As Integer) As ArrayList 'aReturn is used to hold the list of urls Dim aReturn As New ArrayList 'aStart is used to hold the new urls to be checked Dim aStart As ArrayList = GrabUrls(url) 'temp array to hold data being passed to new arrays Dim aTemp As ArrayList 'aNew is used to hold new urls before being passed to aStart Dim aNew As New ArrayList 'add the first batch of urls aReturn.AddRange(aStart) 'if depth is 0 then only return 1 page If depth < 1 Then Return aReturn 'loops through the levels of urls For i = 1 To depth 'grabs the urls from each url in aStart For Each tUrl As String In aStart 'grabs the urls and returns non-duplicates aTemp = GrabUrls(tUrl, aReturn, aNew) 'add the urls to be check to aNew aNew.AddRange(aTemp) Next 'swap urls to aStart to be checked aStart = aNew 'add the urls to the main list aReturn.AddRange(aNew) 'clear the temp array aNew = New ArrayList Next Return aReturn End Function Private Overloads Function GrabUrls(ByVal url As String) As ArrayList 'will hold the urls to be returned Dim aReturn As New ArrayList Try 'regex string used: thanks google Dim strRegex As String = "<a.*?href=""(.*?)"".*?>(.*?)</a>" 'i used a webclient to get the source 'web requests might be faster Dim wc As New WebClient 'put the source into a string Dim strSource As String = wc.DownloadString(url) Dim HrefRegex As New Regex(strRegex, RegexOptions.IgnoreCase Or RegexOptions.Compiled) 'parse the urls from the source Dim HrefMatch As Match = HrefRegex.Match(strSource) 'used later to get the base domain without subdirectories or pages Dim BaseUrl As New Uri(url) 'while there are urls While HrefMatch.Success = True 'loop through the matches Dim sUrl As String = HrefMatch.Groups(1).Value 'if it's a page or sub directory with no base url (domain) If Not sUrl.Contains("http://") AndAlso Not sUrl.Contains("www") Then 'add the domain plus the page Dim tURi As New Uri(BaseUrl, sUrl) sUrl = tURi.ToString End If 'if it's not already in the list then add it If Not aReturn.Contains(sUrl) Then aReturn.Add(sUrl) 'go to the next url HrefMatch = HrefMatch.NextMatch End While Catch ex As Exception 'catch ex here. I left it blank while debugging End Try Return aReturn End Function Private Overloads Function GrabUrls(ByVal url As String, ByRef aReturn As ArrayList, ByRef aNew As ArrayList) As ArrayList 'overloads function to check duplicates in aNew and aReturn 'temp url arraylist Dim tUrls As ArrayList = GrabUrls(url) 'used to return the list Dim tReturn As New ArrayList 'check each item to see if it exists, so not to grab the urls again For Each item As String In tUrls If Not aReturn.Contains(item) AndAlso Not aNew.Contains(item) Then tReturn.Add(item) End If Next Return tReturn End Function

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  • Is there image phase correlation libraries available for Python?

    - by kamasudra
    A project that involves image processing, i.e. to calculate the angular shift of the same image when shifted by a medium of certain Refractive Index. We have to build an app that correlates the 2 images (phase/2D correlation?) and then plot using Chaco and Mayavi (2 libraries in Python). Is there any other existing template software (FOSS) that we can base our app on, or use it as a reference?

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  • Self Update in .net programs?

    - by Rev
    Hi, I`m looking for best mechanism for self update in .net programs! solution should cover this subject: 1) Server - Client Program 2) When new update released, after installing that on the sever-program, all client-program must update itself base on server version.(no need automatic-update for server) 3) Full-Update : for example if server on version 3 and last update package version is 5, update package must contain any older package.

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  • jQuery Treemap Plugin

    - by Revert
    Hello, I am trying to get the Treemap plugin (http://www.jquery.info/spip.php?article40) working with jQuery v1.3.x. The plugin works with jQuery v1.1 and v1.2 but for some reason it fails with the v1.3 base. This is the browser error "Error: uncaught exception: Syntax error, unrecognized expression: " Does anyone know changes occurred between JQuery v1.2 and v1.3 that could cause this? Cheers, D

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  • WIFI connection interfering with Windows Server 2003 Active Directory domain. (How to debug?)

    - by Vinko Vrsalovic
    RELATED: This question has led me to ask this one. I had to change our unnamed crappy ADSL router to a crappy Comtrend CT-5361 WiFi router, now every WiFi connection to the domain doesn't work correctly: Joining the domain is impossible (see related question) Logging into the domain takes ages Authentication usually fails Question: How to debug this and pinpoint the exact problem? I have no enough knowledge on either WiFi networks or on Active Directory to know which connections are made at which stages nor how to check what's happening at the wireless level to compare what should happen to what is happening. I'm looking for resources to learn what should be happening and tools to detect what is actually happening (I expect a sniffer should be enough, but if there are better, more specialized tools, that'd be great).

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  • how to calculate power consumption on an Android mobile that uses wifi?

    - by Marco
    Hello, I have implemented a routing protocol on an Android 1.6 mobile that uses wireless (ad-hoc) network in order to exchange messages. Now I would like to evaluate it under an energy consumption point of view, the base would be to try to calculate the energy wasted to transmit a single packet, do anybody has any idea how to do that? Software/hardware solutions are welcome! Thanx :)

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  • Model def in View State

    - by tinzawtun
    In my ruby on rails project in model, I have some of definition. class PlaySport < ActiveRecord::Base belongs_to :user belongs_to :sport def self.getLevel end def self.check_play_sport(cuser_id,sport_id) end def current_playing_sport end def all_played_sports end end I catch for this relation like this current_user.play_sports.current_playing_sport But I get the undefined method error "current_playing_sports" What is wrong

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  • how to search for a term only in non test files

    - by dorelal
    I use ack and I like it. However from time to time I need to search for something in my code base and I want to ignore all the files residing in test directory. Basically all the files which have test in their absolute path should be not included in the search. How do I achieve that? I am willing to have a custom bash script. Something like ack_no_test "application" - search for "application" in all files but ignore files residing in test directory

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  • Who should own /var/www? [closed]

    - by John
    Possible Duplicate: How should I structure my users/groups/permissions for a web server? I've seen a few answers to this on the internet, but I'm looking for a definitive answer. I have a new Ubuntu 12.04 LTS server with LAMP. Apache is set to run as "www-data" and /var/www is set as having "root" as the owner and "root" as the group. The permissions for /var/www are "drwxr-xr-x" which I believe translates to 755 numerically. I know that /var/www should not be owned by "www-data" because then buggy/malicious code could have a field day. However, should I keep it as root:root (inconvenient) or should I change it to ubuntu:ubuntu, the default user that Ubuntu preconfigures for you to log in with? Should the permissions remain at 755? I've been administrating systems for a while with no big security issues, but I'm trying to get really serious about security, double-check everything, and make sure that there are no gaps in my knowledge.

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