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• JSF managed bean question

  - by Nitesh Panchal

  Hello, I have one page which uses <ui:insert> called master.xhtml which uses one managedbean named MasterBean.java and its of viewScoped. It calls webservice and has all useful data which will be useful in master.xhtml as well as page which is built using master.xhtml (which uses <ui:include>). When i visit data.xhtml (which uses template as master.xhtml) and which uses managed bean as DataBean.java which is also of view scoped, how do i use MasterBean? If i directly use #{Masterbean.property}, won't it create a new instance again? or will it use the bean which is already in view scope? Also how do i use MasterBean in DataBean in such a way that existing MasterBean's instance is used in DataBean. I don't want new instance of MasterBean in DataBean. Thanks in advance. If i am not clear please let me know.

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• Is it possible to evaluate a JSP only once per session, and cache it after that?

  - by Bears will eat you

  My site has a nav menu that is dynamically built as a separate JSP, and included in most pages via <jsp:include />. The contents and styling of the menu are determined by which pages the user does and doesn't have access to. The set of accessible pages is retrieved from the database when a user logs in, and not during the course of a session. So, there's really no need to re-evaluate the nav menu code every time the user requests a page. Is there an easy way to generate the markup from the JSP only once per session, and cache/reuse it during the session?

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• Removing “duplicate objects” with same attributes using Array.map

  - by keruilin

  As you can see in the current code below, I am finding the duplicate based on the attribute recordable_id. What I need to do is find the duplicate based on four matching attributes: user_id, recordable_type, hero_type, recordable_id. How must I modify the code? heroes = User.heroes for hero in heroes hero_statuses = hero.hero_statuses seen = [] hero_statuses.sort! {|a,b| a.created_at <=> b.created_at } # sort by created_at hero_statuses.each do |hero_status| if seen.map(&:recordable_id).include? hero_status.recordable_id # check if the id has been seen already hero_status.revoke else seen << hero_status # if not, add it to the seen array end end end

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• Best way to access a sqlite database file in a web service.

  - by rogernorling

  First question from me on stack overflow. I have created a java web application containing a web service using netbeans (I hope a web application were the correct choice). I use the web application as is with no extra frameworks. This web service use a sqlite JDBC driver for accessing a sqlite database file. My problem is that the file path end up incorrect when I try to form the JDBC connection string. Also, the working directory is different when deploying and when running JUnit tests. I read somewhere about including the file as a resource, but examples of this were nowhere to be seen. In any case, what is the best way to open the sqlite database, both when the web service is deployed and when I test it "localy"? I don't know much about web services, I just need it to work, so please, help me with the technicalities.

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• Normal C++ code in Qt doesnt build and run

  - by Nick

  Hello. I am using Qt under linux, if it matters. I ran successfully under Geany (a simple c++ compiler) the following: //my first program in C++ Hello World! include using namespace std; int main () {cout << "Hello World!"; return 0;} I opened Qt source file and copied the exact same code and i can't build or run. Thank you for your responses to this simple problem.

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• how to get a product's image in magento?

  - by lock

  im running on version 1.3.2.1 but on my client's server they had magento 1.3.0 so my previous code to display images for my local copy: echo $this->helper('catalog/image')->init($_product)->resize(163, 100); does not work on the client's installation looking at the results returned by their magento, ver 1.3.0 actually returns a url although it points to the skin's media folder is there a way to get the absolute image path for the image? or should i make changes somewhere else that would tell magento that the media directory should be on the root?

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• Embarassing C++ question regarding const

  - by Neil Butterworth

  My comments on this answer got me thinking about the issues of constness and sorting. I played around a bit and reduced my issues to the fact that this code: #include <vector> int main() { std::vector <const int> v; } will not compile - you can't create a vector of const ints. I suppose I should have known this, but I've never needed to create such a thing before. However, it seems like a useful construct to me, and I wonder if there is any way round this problem - I want to add things to a vector (or whatever), but they should not be changed once added. There's probably some embarrassingly simple solution to this, but it's something I'd never considered before.

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• Change notification in CouchDB when a field is set

  - by PartlyCloudy

  Hi, I'm trying to get notifications in a CouchDB change poll as soon as pre-defined field is set or changed. I've already had a look at filters that can be used for filtering change events(db/_changes?filter=myfilter). However, I've not yet found a way to include this temporal information, because you can only get the current version of the document in this filter functions. Is there any possibility to create such a filter? If it does not work, I could export my field to a separate database and the only poll for changes in that db, but I'd prefer to keep together my data for obvious reasons. Thanks in advance!

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• Persistent UDP sessions on Android

  - by Wedgeski

  I have a client-server app which requires me to maintain a persistent session over UDP. The goal is to maintain a path from the server to the mobile Android device no matter what route it has to the internet (WiFi or mobile network). This is achieved using a proprietary, well-tested session-management protocol over UDP. I need the phone to be able to maintain, say, a five-minute keep-alive with the server at all times. Ideally I would like to do this without maintaining any wake-locks on the device. I don't want the screen to light up every time I send a UDP to the server, for example, and I don't want to have a damaging effect on battery usage. Has anyone addressed this problem?

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• Find Field In Access Table

  - by user3535895

  I need to connect to a local table in Access and find a an entry in the name field then find the id of that name. I know how to connect to access and create the connection there, but actually manipulating the table I am lost. I can use this to connect to access, but how would I access the table and find the field I am looking for? The data structure of the table I want to connect to is: name text, address text, id autonumber. System.Collections.ArrayList outside = new System.Collections.ArrayList(); System.Data.OleDb.OleDbConnection olecon = new System.Data.OleDb.OleDbConnection"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + path); olecon.Open();

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• Multiple Inheritance Debates II: according to Stroustrup

  - by asksuperuser

  I know very well about the traditional arguments about why Interface Inheritance is prefered to multiple inheritance, there has been already a post here : http://stackoverflow.com/questions/191691/should-c-include-multiple-inheritance But according to Stroustrup the real reason why Microsoft and Sun decided to get rid off multiple inheritance is that they have vested interest to do so: instead of putting features in the languages, they put in frameworks so that people then become tied to their platform instead of people having the same capability at a language standard level. What do you think ? Why Sun and Microsoft consider developers too immature to just make the choice themselves ?

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• Do I need to declare all my JQuery prototypes in a JQueryStatic definition file with typescript?

  - by Marilou

  I have the following code: ///<reference path="../typescript/jquery.d.ts" /> function addThemePrototypes() { var templateSetup = new Array(); $.fn.addTemplateSetup = function(func, prioritary) { if (prioritary) { templateSetup.unshift(func); } else { templateSetup.push(func); } }; } When I try to add the following: $('a').addTemplateSetup( Into this same file I notice there is no intellisense and typescript does not seem to know about the addTemplateSetup prototype that I just added. Is this the correct way for it to work or do I always need to add things like the definition for addTemplateSetup to an JQueryStatic definition file and then include that?

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• Create a basic matrix in C (input by user !)

  - by DM

  Hi there, Im trying to ask the user to enter the number of columns and rows they want in a matrix, and then enter the values in the matrix...Im going to let them insert numbers one row at a time. How can I create such function ? #include<stdio.h> main(){ int mat[10][10],i,j; for(i=0;i<2;i++) for(j=0;j<2;j++){ scanf("%d",&mat[i][j]); } for(i=0;i<2;i++) for(j=0;j<2;j++) printf("%d",mat[i][j]); } This works for inputting the numbers, but it displays them all in one line... The issue here is that I dont know how many columns or rows the user wants, so I cant print out %d %d %d in a matrix form .. Any thoughts ? Thanks :)

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• Windows Service is not Working.

  - by prateeksaluja20

  I had made a windows service in visual studio 2008 in C#.inside the service i had written only single line code try { System.Diagnostics.Process.Start(@"E:\Users\Sk\Desktop\category.txt"); } catch { } then i add the project insatller & change the serviceProcessInstaller1 Account proerty as local system Also change the serviceInstaller1 start type proerty as Automatic. then i build the project.it was succesfull. after that i add another project that was setup project.i had added pprimary project output & i had added the custom action as "Primary output from DemoWindowsService (Active)".then buil the setup.setup was build sucessfully.then i install the setup & then went to services start the service.service stated properly butit was not performing the task. i had checked the path is correct & also i tried to do System.Diagnostics.Process.Start(@"E:\Windows\system32\notepad.exe") but still result is same.i tried alot but not getting the ans soleasse help me to solve this problem.

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• Difference between SRC and HREF

  - by Vijey

  The SRC and HREF attributes are used to include some external entities like an image, a CSS file, a html file, any other web page or a javascript file. Is there a clear differentiation between SRC and HREF? where/when to use SRC or HREF? I think they can't be used interchangeably. I'm giving below few examples where these attributes are used: To refer a CSS file: href="cssfile.css" inside the link tag To refer a js file: src="myscript.js" inside the script tag To refer an image file: src="mypic.jpg" inside an image tag To refer another webpage: href="http://www.webpage.com" inside an anchor tag

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• Office Application in Silverlight 4

  - by gery128

  Hi All, I am currently working on automation of Office 2007 application, which is in windows forms .NET 2.0 with Office Interop library. I would like to know, if can I use Silverlight 4 to make it web application and give users a full-fledged web-page where they can edit the document/excel sheet/presentation ? Also, would I be able to access Object Model just like I do in Windows Application? Because I want to check what changes have been done. Kindly suggest me the right path for this.

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• Custom Global Hotkey Win32 C - Problem

  - by UK

  Hello , I am trying to get the user defined global hot key for my application. Here is my application code, user.rc CONTROL "", IDC_MHOTKEY, HOTKEY_CLASS, WS_TABSTOP, 91, 86, 68, 14 function.cpp WORD wHotKey = SendDlgItemMessage(hwnd, IDC_MHOTKEY, HKM_GETHOTKEY, 0, 0); GLOBAL_HOTKEY= wHotKey; RegisterHotKey ( NULL, TURN_OFF_HOTKEY, HIBYTE(LOWORD(wHotKey)) , wHotKey); main.cpp if ( messages.message == WM_HOTKEY && ( HIWORD ( messages.lParam ) == GLOBAL_HOTKEY) ) alert("Coming only for Single Key"); This code works well, Only If the user selects a single key and not working when he selects multiple key combined like CTRL+F8. I know I am doing something wrong here. Really appreciate If someone guide me in a right path.

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• How can i find and take in my local machine any file in remote machine?

  - by programmerist

  i try to write any codes. For example i have 2 machine: A computer, B computer. My local machine A computer. i also have sql data base . with "select * from" i can learn PatientID. ForExample PatientID :123456. But this patient's pictures file in B Computer.Picture File Name is equal to PatientID. B Computer ports is open for me. I can listen B Computer's 51124 port. How can i get Files from B machine via Port(But this files includes pics ). But this is Windows App. But i don't know files path. My program must find it automatically

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• What to do with someone who can only use "the one true language"?

  - by Rob Wells

  G'day, How do you work with someone when they haven't been able to see that there is a range of other languages out there beyond "The One True Path"? I mean someone who hasn't grown up to realise that the modern software professional has a range of tools in his toolbox. Someone who has a well-equipped toolbox and then selects the best tool for the job at hand. The person who's knee jerk reaction is, for example, "We must do this is C++!" "Everything must be done in C++!" What's the best approach for these people? How do you open them up to the fact that "not everything is a nail." cheers,

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• Linking javascript BASEDIR

  - by Azzyh

  Hello. So continue from this: http://stackoverflow.com/questions/2715295/linking-how-php-html Please check the answer i accepted, and i used the "BASEDIR" solution zneak came with. Now i ran onto another problem.. in my ajax_framework.js i have: $.ajax({url: "session.php", success: function(data){ how should i include BASEDIR onto this? i was thinking something about: $.ajax({url: "'.BASEDIR.'session.php", success: function(data){ but this isnt PHP, so i think you cant? no? any help or maybe another method to come around this?

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• Is there a way to specify java annotations in antlr grammar files?

  - by Steve B.

  I'm looking for a way to include a few additional strings in output .java files generated from antlr. Is there a comprehensive listing of available directives? For example, given parser output like this: package com.foo.bar; //<-- this can be generated with @header { .... } //antlr generated import org.antlr.runtime.*; ... //<-- is there a way to generate anything here? public class MyParser { //<--- or here? public void f1(){ ... } } Is there a way to generate strings that appear after the import statements (e.g. class-level annotations) or possibly method annotations?

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• Whats wrong with this C program?

  - by Prab

  It should give me the number of inputs entered by the user. But it gives 100. I compiled with gcc. #include <stdio.h> int arr[100]; int count=0; int max=100; int main(){ int i, input; printf("Enter integer values one by one, q to quit.\n"); for(i=0;i<max;i++){ scanf("%d",&input); arr[i]=input; if(input=='q')break; count++; } printf("You entered %d values.\n",count); return 0; }

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• Understanding Eager Loading & How to use it? (specific issue)

  - by Elliot

  I have the following relation in my rails app: genre - has many - authors authors - belong to genre and has many books books - belongs to authors and belongs to users (users can add books to the db) in my controller I have: @books=current_user.books(:include => [:author => :genre], :order => 'books.created_at DESC')--- -- In my controller I used to have: @authors = Author.All @genres = Genre.All etc. -- In my view I have @genres.each do |genre| @authors.each do |author| if author.genre_id == genre.id stuff end end end Now that I'm using eager loading, I can't imagine this is the best way to do this (nor does it work as I don't have the @ variables) - I was wondering if anyone could shed some light on how to approach this?

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• Why I have to redeclare a virtual function while overriding [C++]

  - by Neeraj

  #include <iostream> using namespace std; class Duck { public: virtual void quack() = 0; }; class BigDuck : public Duck { public: // void quack(); (uncommenting will make it compile) }; void BigDuck::quack(){ cout << "BigDuckDuck::Quack\n"; } int main() { BigDuck b; Duck *d = &b; d->quack(); } Consider this code, the code doesn't compiles. However when I declare the virtual function in the subclass, then it compiles fine. The compiler already has the signature of the function which the subclass will override, then why a redeclaration is required? Any insights.

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• Whats wrong with my makefile

  - by user577220

  ##################################################################### # This is the filesystem makefile "make_BuddyAlloc". # Author:Michael Gomes # Date:2 jan 2011 ###################################################################### #variable defination CC = gcc CFLAGS = -g -O2 SRC_DIR=src INC_DIR=inc OBJ_DIR=obj #List of source files SOURCE= buddyMain.c \ Copy.c \ #List of object files OBJECTS=$(addprefix $(OBJ_DIR)/,$(SOURCE:.c=.o)) #BuddyAlloc is dependent on "obj/*.o". BuddyAlloc : $(OBJECTS) $(CC) $(CFLAGS) -o BuddyAlloc $< #obj/*.o depends on src/*.c and inc/*.h, we are redirecting the object files to obj folder $(OBJECTS):$(SRC_DIR)/$(SOURCE) $(CC) $(CFLAGS) -I$(INC_DIR) -o $(OBJ_DIR)/$(OBJECTS) -c $< #Cleans all the *.exe files clean: rm -f *.exe I have kept the source files under src folder includes under inc folder and the object files are being saved in obj folder .given above is the makefile i am trying to create for my mini project. I keep getting the error no rule to make target 'Copy.c' needed by 'obj/buddyAlloc.o', but it works fine it i dont include Copy.c, what did i do wrong?

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