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• Early (or re-ordered) re-use of derived columns in a query - is this valid ANSI SQL?

  - by Cade Roux

  Is this valid ANSI SQL?: SELECT 1 AS X ,2 * X AS Y ,3 * Y AS Z Because Teradata (12) can do this, as well as this (yes, crazy isn't it): SELECT 3 * Y AS Z ,2 * X AS Y ,1 AS X But SQL Server 2005 requires something like this: SELECT X ,Y ,3 * Y AS Z FROM ( SELECT X ,2 * X AS Y FROM ( SELECT 1 AS X ) AS X ) AS Y

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• Usernames are evil. How can I make Restful Authentication only require an email address and password

  - by Koning WWWWWWWWWWWWWWWWWWWWWWW

  As the title says: how can I use the Restful Authentication Plugin with Ruby on Rails. When I want to create a new user, it requires me to set the (wrong-named, confusing field) login (= username), email address and password. However, I want, like Facebook does, to require the user to enter only an email address and password, not a username. People will also login with this email address. Can anyone help me?

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• java double[][] - display as image

  - by joe_shmoe

  Hi all, just wondering if there is a simple way in java to display the contents of say 16x16 array of doubles [0..1] as a greyscale image (ala matlab)? using an unfamiliar matrix library, so I'd like to check that I'm on the right track. don't really care if it is slow or ugly, or if it requires external library - it's just there for a quick look, so as long as it works, I'm fine.

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• MongoDB index/RAM relationship

  - by Tegan Clark

  I'm about to adopt MongoDB for a new project and I've chosen it for flexibility, not scalability. From the documentation and web posts I keep reading that all indexes are in RAM. This just isn't making sense to me as my indexes will easily be larger than the amount of available RAM. Can anyone share some insight on the index/RAM relationship and what happens when both an individual index and all of my indexes exceed the size of available RAM?

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• Project summary - Source code lines

  - by MartyIX

  I'm looking for a tool that would count the number of files, the number of lines (with or without comments) and possibly other statistics for my project in PHP and JavaScript. Notes: I've already found SLOCCount which seems quite nice. It requires Cygwin. Yes, I can wrote a simple script for basic information but I'm looking for something more complex. Do you know about alternatives for Windows? Thanks!

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• Having trouble using jQuery to set meta tag values

  - by Zhami

  I'm trying to set meta tags using jQuery (please don't reply that this doesn't make sense since search engines blah-blah-blah... I am loading invoking 3rd party Javascript functions that examine these vales, such as Tweetmeme and Facebook). If I use: $('meta[name=some-name]').attr('content', 'some value'); it does work to set the value of an existing meta tag, but does not create a meta tag if such a named one does not exist. If you have insight or experience with this, please reply...

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• How to check Linux version with Autoconf?

  - by Goofy

  My program requires at least Linux 2.6.26 (I use timerfd and some other Linux-specific features). I have an general idea how to write this macro but I don't have enough knowledge about writing test macros for Autoconf. Algorithm: Run "uname --release" and store output Parse output and subtract Linux version number (MAJOR.MINOR.MICRO) Compare version I don't know how to run command, store output and parse it. Maybe such macro already exists and it's available (I haven't found any)?

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• Microsoft SQL Count problem

  - by Matt

  Hey smarties. I'm having trouble with the following SQL statement. I know that I can't do a GROUP BY on the OnlineStatus column, and it makes sense because it's a function call, not an actual column in my table. How would I modify this so that I can get a count of how many users are online? SELECT CASE dbo.fnGetWebUserOnlineStatus(W.Id) WHEN 1 THEN 'Online' WHEN 2 THEN 'Ingame' ELSE 'Offline' END AS OnlineStatus FROM dbo.WebUsers W WHERE W.[Status]=1 GROUP BY OnlineStatus

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• Prevent Postback in array of linkbutton is created at dynamically

  - by Khilen

  i have created Array of Linkbutton and when user click on link button it will create an array of Radio Buttons but it requires Postback all time so page load takes more time... what is solution of it??

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• to get URL address

  - by rohith

  how to get URL address while every time page is refreshed in java..? i'm doing projects which requires URL(domain name ) while every ti e page is refreshed..!!

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• Django query to get a unique set based on a particular column's value

  - by kchau

  Hope this makes sense... Is there a simple way to return a set of values from a table based on a single column's values being distinctly unique? What I'm hoping for is something like: SegCode.query.filter(ref.unique()).only('ref') That's not real code, but I was hoping there was some simple function out there that will accomplish this...

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• Custom reporting for end users with ASP.NET

  - by chopps

  Hey everyone, Is there a third party tool or something similar that will allow users to create reports on their own without any programming? One code base but custom reports for each user in the system that they create. Make sense?

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• Calculate the Hilbert value of a point for use in a Hilbert R-Tree?

  - by wrt

  I have an application where a Hilbert R-Tree (wikipedia) (citeseer) would seem to be an appropriate data structure. Specifically, it requires reasonably fast spatial queries over a data set that will experience a lot of updates. However, as far as I can see, none of the descriptions of the algorithms for this data structure even mention how to actually calculate the requisite Hilbert Value; which is the distance along a Hilbert Curve to the point. So any suggestions for how to go about calculating this?

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• How do I disable "eager" validation entirely using jquery validate ?

  - by Kevin J

  Is there a way to disable "eager" validation using the jquery.validate plugin? Either through an option in the script or as a hack? "Eager" validation kicks in once the form has been validated once - after that, invalid fields are validated onfocusout. I want to disable this behavior, and change my forms to only be validated when the submit button is pressed. I don't mind hacking through the validate script itself also, so if that's what the solution requires that's acceptable.

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• How do I implement an input mask with prototype?

  - by Chris

  I would like to implement an input mask on Magento and that requires the use of the prototype javascript library. Has anyone done this and would you be willing to share?

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• Can I redirect/alias one web service call to another?

  - by Nathan Pitman

  I've written a simple PHP nusoap web service for an application and wish to change the name of one of the actions so that it makes more sense. However there is a CD-ROM based application in the wild using this web service and this action and so I need to redirect or alias any incoming requests to the new action... any idea how I might go about doing this?

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• SmtpClient, send email through smtp.gmail.com, but From another account.

  - by dynback.com

  I wonna send email through gmail smtp, but users should see my corporative "From" SmtpClient smtp = new SmtpClient("smtp.gmail.com", 587); smtp.EnableSsl = true; smtp.Credentials = new NetworkCredential("[email protected]", "pass", "mail.dynback.com"); I am getting SmtpException: "The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication Required" I heard its all possible and called "Relay", but I am not sure, do i need to put somehow google credentials?

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• Why pop takes a parameter in assembly?

  - by Mask

  popl %ebp It seems the %ebp is unnecessary because the pop operation of stack doesn't need a parameter. Why does it make sense?

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• Fast data retrieval in MySQL

  - by trojanwarrior3000

  I have a table of users - It contains around millions of rows (user-id is the primary key). I just want to retrieve user-id and their joining date. Using SELECT user-id, joining-date FROM users requires lot of time. Is there a fast way to query/retrieve the same data from this table?

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• Any chance to get Core Data using Tokyo Cabinet as the persistent store?

  - by dontWatchMyProfile

  I watched a free high quality video with Aaron Hillegass about Core Data vs Tokyo Cabinet. Besides that this guy is amazingly funny (really, if you want to laugh now, watch it!), he shows off Tokyo Cabinet beeing about 40x faster than Core Data. I wonder if it's worth thinking about how to attach this to Core Data? Does that make any sense? Maybe as a custom atomic store or something like this?

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• Is this not downcasting?

  - by cambr

  If I do double d = 34.56; int i = (int)d; Am I not "downcasting"? OR Is this term only used in terms of classes and objects? I am confused because in this case we are "downcasting" from a bigger double to a smaller int, but in case of classes, we "downcast" from a smaller base class to a bigger derived class. Aren't these two conventions, in some sense, opposite?

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• Contains performs MUCH slower with variable vs constant string SQL Server

  - by Greg R

  For some unknown reason I'm running into a problem when passing a variable to a full text search stored procedure performs many times slower than executing the same statement with a constant value. Any idea why and how can that be avoided? This executes very fast: SELECT * FROM table WHERE CONTAINS (comments, '123') This executes very slowly and times out: DECLARE @SearchTerm nvarchar(30) SET @SearchTerm = '123' SET @SearchTerm = '"' + @SearchTerm + '"' SELECT * FROM table WHERE CONTAINS (comments, @SearchTerm) Does this make any sense???

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• Need Flex Regex Validation Expression for password that allows for only alphanumeric values and requ

  - by BlueDude

  Hi I'm trying to setup a RegexpValidator that only accepts a string of alphanumeric characters between 6-30 characters long and requires one number. I'm new to Regular Expressions and everything I've tried seems to keep returning an invalid ValidationRsultEvent. Here's a chunk of code: <mx:RegExpValidator id="regexValidator" source="{passwordInput}" property="text" triggerEvent="" valid="onPasswordValidate(event)" invalid="onPasswordValidate(event)" /> private function validateRegister():void { regexValidator.expression = "^(?=.*(\d|\W)).{6,30}$"; regexValidator.validate(); }

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• Why do we need to use out keyword while calling a method

  - by Midhat

  When a method is defined with an out parameter, why do I have to specify the out keyword when calling it. Its already there in the method definition, and the runtime should know that any parameter passed will be an out parameter. It would make sense if the compiler will accept the argument with or without out keyword, with different semantic, but if you MUST add the keyword to make the code compile, whats the use? Shouldn't the compiler handle it automatically? Same for ref

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• Calling Class from another File ASP.NET VB.NET

  - by davemackey

  Lets say I have a class like this in class1.vb: Public Class my_class Public Sub my_sub() Dim myvar as String myvar = 10 Session("myvar") = myvar End Sub End Class Then I have a ASP.NET page with a code-behind file, default.aspx and default.aspx.vb and I want to call my_class. I'm doing the following, but it doesn't work: Imports my_app.my_class Partial Public Class _default Inherits System.Web.UI.Page Protected Sub Page_Load(ByVal sender as Object, ByVal e as System.EventArgs) Handles Me.Load my_class() End Sub End Class I get a "Reference to a non-shared member requires an object reference"

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