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• Local variable vs parameter

  - by Dhana

  function doIt(param) { var localVar = param; //do lots of stuff with localVar } function doIt(param) { //do lots of stuff with param } Is there any difference in terms of efficiency between the code above?

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• MVC architecture EJB funcionallity

  - by Ignacio

  HI would like to understand how do ejbs work in an MVC architecture, what i do not get is: When the web app starts, the system creates an ejb for each record in every table of db or an ejb with all the records of all tables? Thank you very much

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• Django - problem with {% url facebook_xd_receiver %}

  - by Gaurav

  I'm using {% url facebook_xd_receiver %} in one of my HTML files. This works just fine when I run my project using the command python manage.py runserver But the same project stops running and gives me a "TemplateSyntaxError" at the line {% url facebook_xd_receiver %} Can anyone please tell me what could be the difference between the dev server run through the command line and the apache server. Is there anything I'm missing out on while configuring the Apache server? Or is it a Django problem?

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• question about timestamp with timezone in postgresql+java?

  - by ylazez

  hey guys i have a column in the database(postgresql) i want to insert the current time in GMT in this column when getting the current time and inserting it into the DB it's inserted in the server timezone GMT-5 although that time was in GMT+0 any ideas how to insert this time in the database in GMT timezone ?

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• Encryption container for multiple people

  - by Adam M.

  I was just wondering if anyone may have come across a product that would allow for a container based encryption to be used by multiple people, in a Windows Server setup. I wanted to see if there might be something like a truecrypt that could handle being accessed by two accounts? Looking to see if there is a product that would have such properties that would allow only a hand full of users access to the content of the location, but allow for the files to be backed up a normal backup system. That way if a file had to be restored, the container could be redirected to another location for one of the users to get access to it? This would allow for access to be restricted beyond the NTFS and file share permissons

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• Protect foreach loop when empty list

  - by SteB

  Using Powershell v2.0 I want to delete any files older than X days: $backups = Get-ChildItem -Path $Backuppath | Where-Object {($_.lastwritetime -lt (Get-Date).addDays(-$DaysKeep)) -and (-not $_.PSIsContainer) -and ($_.Name -like "backup*")} foreach ($file in $backups) { Remove-Item $file.FullName; } However, when $backups is empty I get: Remove-Item : Cannot bind argument to parameter 'Path' because it is null. I've tried: Protecting the foreach with if (!$backups) Protecting the Remove-Item with if (Test-Path $file -PathType Leaf) Protecting the Remove-Item with if ([IO.File]::Exists($file.FullName) -ne $true) None of these seem to work, what if the recommended way of preventing a foreach loop from being entered if the list is empty?

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• Getting page status history in Sharepoint

  - by user307852

  Hi, I need to get all dates and people modifications to currenlty displayed page, all changes which have been published and end user can see difference between them. My page is aspx connected to pageLayout in which is richhtmlfield with article. How to do that? Is it possible to do that ?

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• UnknownHostException in java (that too only sometimes)

  - by Nitesh Panchal

  Hello, I am trying to read rss feed of Yahoo but i am unable to make it work properly. The code is absolutely correct , i am sure about it. It works sometimes but sometimes i get UnknownHostException. What can be the reason? Is there some problem with my internet or something else? This is my code :- public List<RssFeed> getRssFeed() { try { List<RssFeed> objList = new ArrayList<RssFeed>(); DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); DocumentBuilder db = dbf.newDocumentBuilder(); Document doc = db.parse("http://rss.news.yahoo.com/rss/india"); //doc.getDocumentElement().normalize(); Element docElement = doc.getDocumentElement(); NodeList objChannelList = docElement.getChildNodes(); for (int intIndex = 0; intIndex < objChannelList.getLength(); intIndex++) { if (objChannelList.item(intIndex).getNodeType() == Node.ELEMENT_NODE) { Element elemItem = (Element) objChannelList.item(intIndex); NodeList itemList = elemItem.getElementsByTagName("item"); //show only 3 news int count = itemList.getLength() > 3 ? 3 : objChannelList.getLength(); for (int intSubIndex = 0; intSubIndex < count; intSubIndex++) { NodeList itemDetailList = itemList.item(intSubIndex).getChildNodes(); String strTitle = ((Node) itemDetailList.item(RSS_VALUES.TITLE.getValue())).getFirstChild().getNodeValue(); String strdescription = ((Node) itemDetailList.item(RSS_VALUES.DESCRIPTION.getValue())).getFirstChild().getNodeValue(); String strLink = ((Node) itemDetailList.item(RSS_VALUES.LINK.getValue())).getFirstChild().getNodeValue(); //System.out.println(strTitle + "\n" + strdescription + "\n" + strLink + "\n\n\n\n"); objList.add(new RssFeed(strTitle, strdescription, strLink)); } } } return objList; } catch (SAXException ex) { Logger.getLogger(Utils.class.getName()).log(Level.SEVERE, null, ex); } catch (IOException ex) { Logger.getLogger(Utils.class.getName()).log(Level.SEVERE, null, ex); } catch (ParserConfigurationException ex) { Logger.getLogger(Utils.class.getName()).log(Level.SEVERE, null, ex); } return null; } Thanks in advance :). This problem has been bugging me since 1 month. Don't know why does Java in this case behave as per its mood :(

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• How to remove a drive from a 2-drive RAID 5 array?

  - by DrSAR

  There is some information available on shape changes in RAID arrays but I'm a little nervous and would like confirmation: Problem: I have 2 500GB drive as software raid 5 (mdadm). I would like to free one of the two drives since RAID-redundancy is for wimps... Can I just mdadm --grow --array-size=1 followed by a mdadm --grow --raid-disks 1? This seems too simple. How would I specify which drive gets freed? Part of the reason for this maneuver is that I don't have additional space to run a backup.

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• jQuery on/delegate correct syntax

  - by KryptoniteDove

  As the jQuery API is currently down, is anyone able to assist me with the below? I am ajax loading an unordered list into the web page and need to be able to attach hover and click events to the list items. <ul> <li class="option">Item 1</li> <li class="option">Item 1</li> <li class="option">Item 1</li> </ul> So far I have tried a few variations of the below jQuery code using .on for version 1.7+ $("ul").on("click", "li .option", function(){ alert($(this).text()); }); Can anyone point me in the right direction? I'm aware that .live has been depreciated and that .delegate has been superceeded so really only looking for a solution that will allow me to use .on. Thanks as always!

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• WPF Application with Database.

  - by mike

  Hi, i would like to or need to use a database for my wpf project. It has to store "person" "team" "goals" and maybe 2 more things, nothing very big. Ive already used (worked) with databases in java / php (postgresql), but is there maybe an "easier" way to store the things.. i mean if the db is going to be big than i could use (postgre or mysql), but this one would be small.

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• Javascript plugin creation

  - by Aneesh

  I want to create a plugin called 'myPlugin'. Which method should I use and what is the difference between these two methods? Please tell me the advantages too. I am from designing background and not much programming knowledge. var myPlugin = { myId:"testId", create:function(){}, destroy:function(){} } OR function myPlugin() { this.myId = "testId"; this.create = function(){}; this.destroy = function(){}; }

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• Add method to Array in Javascript

  - by user1167650

  Is it possible to add a method to an array() in javascript? (I know about prototypes, but I don't want to add a method to every array, just one in particular). The reason I want to do this is because I have the following code function drawChart() { //... return [list of important vars] } function updateChart(importantVars) { //... } var importantVars = drawChart(); updateChart(importantVars); And I want to be able to do something like this instead: var chart = drawChart();<br> chart.redraw(); I was hoping there was a way I could just attach a method to what i'm returning in drawChart(). Any way to do that?

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• appendChild + createElement

  - by user317005

  what's the difference between var div = document.createElement('div');//output -> [object HTMLDivElement] document.getElementById('container').appendChild(div); and var div = '<div></div>'; document.getElementById('container').appendChild(div);//output -> <div></div> shouldn't both be the same? and if not, how do i get the 2nd version to work?

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• (iphone) how can I tell I need a 3.0 + iOS installed device when looking at apple doc?

  - by Eugene

  Hi, I've seen iphone related open source library which says something like, "You need 4.0+ iOS build environment but the code will run on 3.0+ iOS device." I wonder how those two requirements can differ and how can I tell a minimum 'device' iOS version which a certain api would need. For instance I want to use UIGestureRecognizer but the apple doc says it's 3.2+, but I want my app run on 3.12+. Is there a difference between build os requirement and device os requirement to run an app? Thank you

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• What is the advantage of using constraints on C# Generics

  - by user313197

  Can someone tell me what the difference is between the following public class CarCollection:List where T:Car { } and public class CarCollection:List { } To me they seem to do the same thing, create type-safe collection of "Car" objects.

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• What is the most efficient way to create emtpy ListBuffer ?

  - by drypot

  What is the most efficient way to create emtpy ListBuffer ? val l1 = new mutable.ListBuffer[String] val l2 = mutable.ListBuffer[String] () val l3 = mutable.ListBuffer.empty[String] There are any pros and cons in difference ?

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• Javascript serialization

  - by John

  Have I any chance to serialize meta (any format, so I can store it in DB)? var obj1 = {}; var obj2 = {}; obj1.link = obj2; obj2.link = obj1; var meta = [obj1, obj2]; As I understand the problem is that JSON serialize object`s links to objects.

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• C#:Photo matching

  - by Meko

  Hi.I created app that searches via blue tooth mac addresses and compare match them with data base. But I want to try not matching Mac Addresses , I want to make it like taking photo and matching with in database. For this what should I do? Where to start? I have an DB that includes all value for students with an Mac addresses I thing instead of Mac addresses I will add only photos.But Matching Two photo is hard way?It don`t have to be like FBI using :)

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• About presenter pattern in rails. is a better way to do it?

  - by Totty

  I have in my model: def presenter @presenter ||= ProfilePresenter.new(self) @presenter end The ProfilePresenter is a class that has methods like, get_link(), get_img_url(size), get_sex(), get_relationship_status() and other methods that have not to do with the model, not even with the controller but is used multiple times in the view. So now i use them by doing this: Profile.presenter.get_link # or Profile.presenter.get_img_url('thumb') # returns the path of the image. is not used to make a db query

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• How to get reference of activity object ?

  - by Fevos

  Hi i want to show messageBox or notification when connection lost in Static DB class but i cant use getApplicationContext() becouse its a static class and i tried to call other class called notification but i have error so how i could pass activity object to my new class .

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• Take a string to a byte[]

  - by Vaccano

  I have a string in my database that represents an image. It looks like this: 0x89504E470D0A1A0A0000000D49484452000000F00000014008020000000D8A66040.... <truncated for brevity> When I load it in from the database it comes in as a byte[]. How can I convert the string value to a byte array myself. (I am trying to remove the db for some testing code.)

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• Count days within a month from date range

  - by G. Muqtada

  I have three date ranges in mysql table as follow from 2013-09-29 to 2013-10-02 from 2013-10-14 to 2013-10-16 from 2013-10-28 to 2013-11-05 I want to count only days that occur in Month of October, for example from first range (2013-09-29 to 2013-10-02) I should get difference of two days (1st and 2nd October) , and it should ignore days from September month, Finally i want to count total days in a given month from above date ranges. Can it be done from direct mysql query. or any short PHP logic.

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• How to prevent regex from stopping at the first match of alternatives ?

  - by miket2e

  If I have the string hello world , how can I modify the regex world|wo|w so that it will match all of "world", "wo" and "w" rather than just the single first match of "world" that it comes to ? If this is not possible directly, is there a good workaround ? I'm using C# if it makes a difference: Regex testRegex = new Regex("world|wo|w"); MatchCollection theMatches = testRegex.Matches("hello world"); foreach (Match thisMatch in theMatches) { ... }

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• How to get the duration of the video uploaded ?

  - by Holicreature

  i'm using ffmpeg to convert videos to desired formats and to generate the thumbnails.. I want to find the total duration of the video to display in the main page along with the thumbnails.. Can i use ffmpeg to find the duration when its being uploaded and store them on the database.? Is storing the duration in db is necessary or else is there any other method?

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