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  • Simple javascript to mimic jQuery behaviour of using this in events handlers

    - by Marco Demaio
    This is not a question about jQuery, but about how jQuery implements such a behaviour. In jQuery you can do this: $('#some_link_id').click(function() { alert(this.tagName); //displays 'A' }) could someone explain in general terms (no need you to write code) how do they obtain to pass the event's caller html elments (a link in this specific example) into the this keyword? I obviously tried to look 1st in jQuery code, but I could not understand one line. Thanks!

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  • Amazon Web Services : Fault tolerant solution

    - by Algorist
    Hi, I am using Boto library to write scripts for automating our jobs on AWS. My script actually starts a hadoop cluster using cloudera scripts and then does some customization. I am having a problem with retries. Seems like very command in my script fails once couple of days. I started adding retry to all the commands, but then the code is very clumsy and difficult to maintain. what do people do in general. Thank you Bala

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  • translate database fields with rails

    - by fursie
    hi I know about the built-in I18n in Rails, but how can I select a database field per locale? My model structure is something like this: title #default (englisch) title_de #(german) title_it #(italian) In my template I want to be able to write only <%= @model.title %> and should get the value in the right language. Is there a plugin or a solution to use different fields per different locale settings with a structure like mine?

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  • maintain pageViews in global.asax (asp.net)

    - by nishant
    I need a function in global.asax file which gets called only once when user enter a page url. application_beginrequest gets called 50-60 times in a single page( as to render a page several requests go to server.) i though of a solution - I can write my fucntion in global.asax and call it on page load of other pages but in that solution I need to call it in every page. I would prefer something which is to be done only in global.asax

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  • Hbase / Hadoop Query Help

    - by zechariahs
    I'm working on a project with a friend that will utilize Hbase to store it's data. Are there any good query examples? I seem to be writing a ton of Java code to iterate through lists of RowResult's when, in SQL land, I could write a simple query. Am I missing something? Or is Hbase missing something?

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  • count columns group by

    - by zhangzhong
    I hava the sql as below: select a.dept, a.name from students a group by dept, name order by dept, name And get the result: dept name -----+--------- CS | Aarthi CS | Hansan EE | S.F EE | Nikke2 I want to summary the num of students for each dept as below: dept name count -----+-----------+------ CS | Aarthi | 2 CS | Hansan | 2 EE | S.F | 2 EE | Nikke2 | 2 Math | Joel | 1 How shall I to write the sql?

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  • Will Windows Mobile 7 Support Multitasking third party apps

    - by Christopher Edwards
    Obviously it's early days, I do not know whether this is information that is in the public domain or not yet, but... I have trawled through some of this site - http://www.windowsphone7series.com/ but I can't seem to find the answer. Specifically will I be able to write an app on the phone that updates the cloud with the phones current GPS position in the background even when other apps are running in the foreground.

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  • Simplest Way to Test ODBC on WIndows

    - by Rescommunes
    With unixODBC you can use a simple command line utility called "isql" to test your connection permissions etc. Without having to write extra code or install libs is there a simple way to open up X data source send some sql commands and be done with it?

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  • Android JARSIGNER GUI tool?

    - by BahaiResearch.com
    Newbie question. After I have written the Android App (easy part) I need to sign it and upload it (seems the hard part) Is there an Open Source app or tool that I can use to do this so that I don't have to write command shell scripts. JARSIGNER looks overly complex. I'm looking for a dead simple Sign-And-Package up tool. I am using Eclipse with the Android plug in.

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  • Asynchronous message queues and processing like Amazon Simple Queue service in django

    - by becomingGuru
    There are many activities on an application that need things like: Send email, Post to twitter thumbnail an image, into several sizes call a cron to find connected relationships A good way to do these tasks is to write into an asynchronous queue on which operations are performed. What django application can be used to implement such functionality, as the one Amazon Simple Queue service offers, locally? I have come across celery. Right thing? Anything else that exists, like this?

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  • Validate a long type input

    - by Santiago
    I'm trying to validate that a user only enters a long value as input (long bigger than 0 actually). Compare and Range validator has DataTypeCheck for int values only. I was planning on using this class in a CustomValidator but then I would need to write both, client and server side validation code. Do you know of any other good way of doing this? Thanks!

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  • Symfony Forms - trigger a custom error message in a form

    - by Martin Sikora
    Hello, in my frontend application I'm using my own login form (just email and password fields) and in the login action I'm trying to check whether the user was logged in successfuly or not. My question is: If the user wasn't logged in successfuly is there a simple way how can I add an error message to my login form? Do I have to write my own validator?

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  • Java: Using Command line arguments to process the names of files

    - by Kat
    I'm a writing a program that will determine the number of lines, characters, and average word length for a text file. For the program, the specifications say that the file or files will be entered as a command line argument and that we should make a TestStatistic object for each file entered. I don't understand how to write the code for making the TestStatistic objects if the user enters more than one file.

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  • Easiest Way To Get Started In Dot Net

    - by Avery Payne
    Ok, so the initial search in StackOverflow shows nothing related for this question. So here it goes: Let's pretend for a moment that you're just getting started in a career in computer programming. Let's say that, for whatever reason, you decide to use the .Net framework as a basis for your programming. Let's also say that you've been exposed to some programming background, but not one in .Net, so it seems foreign to you at first. And lastly, you don't have the benefit of 25 years of exposure to the Win32 API, which explains why it seems so foreign to you when you start looking at it. So the questions are: What is a comprehensive overview of what .Net is? It appears to be a combination of a runtime environment, a set of languages, a common set of libraries, and perhaps a few other things...so it's about as clear as mud. Specifically, what are the key components to .Net? What is the easiest way to understand .Net programming with regard to available APIs? Which language would best suit beginning programming out of the "stock" languages that Microsoft has to offer? (C++, C#, VB, etc.) What are some differences between .Net programming and programming in a procedural language (aka Pascal, Modula, etc.) What are some differences between .Net programming and programming in a "traditional" object-oriented language? (aka Smalltalk, Java, Python, Ruby, etc.) As I currently understand it, the CLR provides a foundation for all of the other languages to run on. What are some of the inherent limitations of the CLR? Given the enormous amount of API to cover, would it even be worth learning a .Net language (using the Microsoft APIs) given that you would not have prior exposure to Win32 programming? Let's say you write a for-profit program with .Net. Can you resell the program without running afoul of licensing issues? Let's say you write a gratis (free) program with .Net. Can you offer the program to the public under a "free" license (GPL, BSD, Artistic, etc.) without running afoul of licensing issues? Thank you in advance for your patience.

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  • Collect a list in JS with regex?

    - by acidzombie24
    Basically i want to output a div with all the ids in it. I know how to do that especially with jquery but collecting the ids is the problem not the list. I failed at regex although i know how to use it in .NET. How do i write this regex properly? so i can get a list of ids and display it as i want. http://jsfiddle.net/NgmGf/

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