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• NTFS performance and large volumes of files and directories

  - by James Newton-King

  How does Windows with NTFS perform with large volumes of files and directories? Is there any guidance around limits of files or directories you can place in a single directory before you run into performance problems or other issues? e.g. is a folder with 100,000 folders inside of it an ok thing to do

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• django: Changing auto_id of ModelForm based form class

  - by Meilo

  Every time I create an instance of the TestForm specified below, I have to overwrite the standard id format with auto_id=True. How can this be done once only in the form class instead? Any hints are very welcome. views.py from django.forms import ModelForm from models import Test class TestForm(ModelForm): class Meta: model = Test def test(request): form = TestForm(auto_id=True)

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• Can asp.net dynamic data work for more than one database??

  - by Perpetualcoder

  Can I have scaffolding for tables from more than one table in a single asp.net dynamic data website?? If so, how do you do it?

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• Are JavaScript arrays associative?

  - by Lem0n

  For instance, if I do a[1000000]=1; will it use memory for 1000000 elements or just for this one?

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• To Reference A Generic Method With A Lambda Expression

  - by SDReyes

  It is possible to reference a generic method using a Lambda Expression Object? For example, having: TheObject: public abstract class LambdaExpression : Expression TheMethod (an extension method of LINQ): public static TSource Last<TSource>( this IEnumerable<TSource> source ) I'm trying to create an instance of TheObject, that references to TheMethod. How do you do such thing?

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• How to write modular code in netbeans java swing apllications?

  - by rgksugan

  I am creating my java Swing application in Netbeans. At present there are more than 2000 lines of code. Is it right to have these many number of lines in a single file. Moreover the IDE has become slow when i am editing this file. Is there any way to overcome this?

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• What is the recommended approach towards multi-tenant databases in MongoDB?

  - by Braintapper

  I'm thinking of creating a multi-tenant app using MongoDB. I don't have any guesses in terms of how many tenants I'd have yet, but I would like to be able to scale into the thousands. I can think of three strategies: All tenants in the same collection, using tenant-specific fields for security 1 Collection per tenant in a single shared DB 1 Database per tenant The voice in my head is suggesting that I go with option 2. Thoughts and implications, anyone?

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• Uploading Multiple Files in ASP.NET 2.0 using Ajax Uploader

  - by user273414

  I m using CuteWebUI.AjaxUploader.dll and i want to upload multiple files in Filesystem like c:\foldername at single click.how can i do this. Control i m Using:-

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• Is derived table executed once or three times?

  - by AspOnMyNet

  Every time you make use of a derived table, that query is going to be executed. When using a CTE, that result set is pulled back once and only once within a single query. Does the quote suggest that the following query will cause derived table to be executed three times ( once for each aggregate function’s call ): SELECT AVG(OrdersPlaced),MAX(OrdersPlaced),MIN(OrdersPlaced) FROM ( SELECT v.VendorID, v.[Name] AS VendorName, COUNT(*) AS OrdersPlaced FROM Purchasing.PurchaseOrderHeader AS poh INNER JOIN Purchasing.Vendor AS v ON poh.VendorID = v.VendorID GROUP BY v.VendorID, v.[Name] ) AS x thanx

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• Azure table storage: maximum variable size ?

  - by Egon

  I will be using the table storage to store a lot of blob names, in a single string, appended to each other using some special character. This string will sky rockets pretty soon. But is there a maximum size to the length of a property for a particular entity ? in my case the string ?

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• How do I reuse a previously-opened port, using SBCL's sockets?

  - by esperantist

  Creating a server-side socket will fail if I'm trying to use the same port I've used before. An address-in-use error occurs. (make-instance 'sb-bsd-sockets:inet-socket :type :stream :protocol :tcp) How do I stop this from happening? Hints and code snippets very welcome! (CL newbie here.) Thanks!

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• Castle ActiveRecord Table name conflict

  - by Shane

  When you run into a reserved word like "User" in NHibernate you would just put single quotes around the offending text and nHibernate will surround the text with square brackets for querying. My question is how do you do the same thing using Castle.ActiveRecord?

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• Select nth percentile from MySQL

  - by mazin k.

  I have a simple table of data, and I'd like to select the row that's at about the 40th percentile from the query. I can do this right now by first querying to find the number of rows and then running another query that sorts and selects the nth row: select count(*) as `total` from mydata; select * from mydata order by `field` asc limit 37,1; Can I combine these two queries into a single query?

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• auto submit form from command line

  - by combatwombat

  I have a form page in PHP that reads a DBF, and conditionally converts it into a MySQL - extracting the data from an old, but still production accounting app. The conversion should be able to be actioned without user intervention, ie scripted from the web-host's command line on a cron job. How can I get PHP to submit the form automatically when receiving variables at command line, like for instance a specific post variable? Every auto-submit I've found so far relied upon javascript, which would be useless at PHP command line.

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• Repository organization and selective checkout

  - by Maurizio Reginelli

  I am using TortoiseSVN and I have a SVN repository organized in this way: folder1 folder2 trunk tag branches folder3 trunk tag branches folder4 folder5 trunk tag branches I would like to know if there is a way to checkout only trunk directories, keeping the entire tree under the versioning control: folder1 folder2 trunk folder3 trunk folder4 folder5 trunk In this way I can update all trunks with a single update command on folder1, without updating tags and branches which can be full of data.

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• How to disassembly an object creation in Python?

  - by systempuntoout

  Having a class like this: class Spam(object): def __init__(self, name=''): self.name = name eggs = Spam('systempuntoout') Using dis, is it possible to see how an instance of a class and the rispective identity are created?

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• Best document format for addressbook in CouchDB

  - by 2x2p1p

  Hi guys. I really tried, tried so hard but i cant understand couchdb :( I must record the contact of several people, should i put every contact in a single document ? codeviewer.org/view/code:df8 Or in different documents ? codeviewer.org/view/code:df9 I confused, can somebody help me ? Thanks.

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• Python (Django). Store telnet connection

  - by Shamanu4

  Hello. I am programming web interface which communicates with cisco switches via telnet. I want to make such system which will be storing one telnet connection per switch and every script (web interface, cron jobs, etc.) will have access to it. This is needed to make a single query queue for each device and prevent huge cisco processor load caused by several concurent telnet connections. How do I can do this?

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• Serving wildcard subdomains from the mulitple servers.

  - by user489176

  I have a web application to which I want users to login only through their unique sub-domain (the sub-domain will be chosen at signup). So that I can scale the application across a number of servers, what would be the best way to set up Apache to always serve the same subdomains from the same server? For instance: matt.yyy.com, helen.yyy.com, terry.yyy.com are always served from server with ip of xxx.xxx.xxx.xxx suzi.yyy.com, fred.yyy.com, tom.yyy.com are always served from server with ip of xxx.xxx.xxx.xxx

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• asp.net web app - writing data to access or error logs?

  - by chris

  I'm looking for a quick way to log some data - I seem to remember a way to write to the access log, similar to System.Out.Println() but I can't seem to remember how to do it. I can't attach a debugger, nor can I add additional information to the web app via Response.Write(). Is there a simple way - a single statement with no configuration changes would be ideal - to write to either the error or access logs?

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• Tools to convert option strict off code into option strict on?

  - by deerchao

  I have to take over a project written in vb.net, which more than 400k lines of code written in option strict off mode. I want to build it under option strict on first before I do anything else -- which maybe converting it into C#. I found there's thousands of lines of code raises compilation error, mostly are about implicit type casts. Is there any tool would help to make it compile under option strict on mode if I don't want to correct every single line manually?

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• Flash causing crash in embeded browser

  - by Lodle

  For my work project we recently switched from visual studio 2008 to 2010 and we use an embedded instance of firefox to render webpages. The only problem we are having is that flash seems to crash the application. It seems that instead of linking dynamically to the runtime it needs its using the new 2010 one and is having issue with new and delete. Any ideas on how to fix instead of switching back to 2008?

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• How do you sort a C# dictionary by value?

  - by kurious

  I often have a Dictionary of keys & values and need to sort it by value. For example, I have a hash of words and their frequencies, and want to order them by frequency. There's SortedList which is good for a single value (frequency), but I want to map it back to the word. SortedDictionary orders by key, not value. Some resort to a custom class, but what's the cleanest way?

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• Can't get multiple panel plots with chartSeries function from quantod package in R

  - by Milktrader

  Jeff Ryan's quantmod package is an excellent contribution to the R finance world. I like to use chartSeries() function, but when I try to get it to display multiple panes simultaneously, it doesn't work. par(mfrow=c(2,2)) chartSeries (SPX) chartSeries (SPX, subset="2010") chartSeries (NDX) chartSeries (NDX, subset="2010") would normally return a four-panel graphic as it does with the plot() function but in the chartSeries example it runs through all instances one at a time without creating a single four-panel graphic.

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• Concatenation of files using ffmpeg does not work as I expected. Why?

  - by Peter Olson

  I execute the following command line for ffmpeg.exe -i C:\Beema\video-source\DO_U_BEEMA176x144short.avi -i C:\Beema\video-source\DO_U_BEEMA176x144short.avi -i C:\Beema\temp\9016730-51056331-stitcheds.avi -i C:\Beema\video-source\GOTTA_BEEMA176x144short.avi -y -ac 1 -r 24 -b 25K C:\Beema\video-out\9a062fb6-d448-48fe-b006-a85d51adf8a1.mpg The output file in video-out ends up having a single copy of DO_U_BEEMA. I do not understand why ffmpeg is not concatenating. Any help is dramatically appreciated,

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