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• How do I create a symbolic link to a UNC Path in Windows XP

  - by Sebas

  I have a workstation with Windows XP and I need to make a symbolic link or mount a UNC Path like a local Drive. I need the same behavior that produces M-Daemon tools when you mount an .iso File but with a remote directory. This is because I have a software client that perform several task but only with local drives and directorys. The remote UNC path is a NAS server, thats the why I need to perform all the tasks from a workstations.

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• Varnish + Tomcat vs Apache + mod_jk + Tomcat

  - by Adrian Ber

  Does anyone have some comparison data in terms of performance for using in front of Tomcat either Varnish or Apache with mod_jk. I know that AJP connector suppose to be faster than HTTP, but I was thinking that in combination Varnish which is lighter and highly optimized could perform better. There is also the discussion between static resources (which I think will perform faster with Varnish than Apache, even with mod_cache) and dynamic pages.

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• Ubuntu 9.10 will not boot

  - by Jim

  After an update yesterday my Dell X300 will only boot to a screen with an option to perform 2 memory tests. If I perform these tests, it will only go back to this same screen, offering a choice of memory test again, 86+ or 86+ serial console 115200. This screen is headed - GNU Grub version 1.97 beta 4. This is a full install on my hard drive. How can I get back to booting normally?

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• Off-the-shelf solutions for migrating data from azure blobstorage to rackspace cloud files

  - by S.C.

  I have large amounts of data (500+ GB) stored in azure blob storage that I need to transfer to rackspace cloud files. I know it is possible to perform such a migration using the SDKs from both services, but is there a free, standard, 1-step process for doing this? I've built a POC utility but would like to avoid having to optimize it to perform the transfer within a reasonable amount of time. Thanks.

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• Intel Core 2 Duo E6600 versus AMD Athlon II X2 3GHZ

  - by Billy ONeal

  Hello :) I have an Intel Core 2 Duo E6600 (2.4GHZ) in my current desktop, and I have a newer machine with an AMD Athlon II X2 3.0GHZ. I'm wondering how the systems will perform in comparison to one another. I'd like to use the AMD because it's 45nm and uses less power, but I don't want to do so at a loss in perforamnce. Which should perform better? Billy3

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• How to compare data in 2 columns in Excel and then in one cell, determine if there are similar data in both columns

  - by Charmaine Camara

  I have 2 columns in Excel: the first contains a list of employee names who perform function A, and the second contains a list of employee names who perform function B. What I want is to identify, in one cell, if there is one employee whose name appears in both the first and second columns. It does not have to show which name(s) appears in both columns, it just needs to identify IF there are any names that appear in both columns.

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• Uuntu 9.10 will not boot

  - by Jim

  After an update yesterday my Dell X300 will only boot to a screen with an option to perform 2 memory tests. If I perform these tests, it will only go back to this same screen, offering a choice of memory test again, 86+ or 86+ serial console 115200. This screen is headed - GNU Grub version 1.97 beta 4. This is a full install on my hard drive. How can I get back to booting normally?

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• How to use query-replace on filesets in emacs

  - by user93341

  Emacs documentation states that you can use query-replace on filesets to perform find/replace on multiple files. This lets you perform certain operations, such as visiting, query-replace, and shell commands on all the files at once. I've opened my particular fileset (i.e. via fileset-open) and attempted query/replace using both: M-% and M-x query-replace but can't get it to work on anything but the file (buffer) I'm currently in.

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• Untar multiple files in different directories

  - by wildeep

  Hi, am trying to perform an update on multiple site that use an open source CMS but untaring a patch file in each sites httpdocs directory. My plan was to perform a find for the patch file then untar using the following command: find . -name "patchfile.tar.gz" -exec tar -xzvf {} \; -print but it doesnt seem to work successfully anyone have any ideas as to why not? Many thanks.

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• Multiline select in notepad++

  - by capnhud

  In sublime text if I perform a find for an occurrence of a particular word not only is this occurrence found but it also selected and has the cursor at the end of each occurrence so that pushing the right arrow key the cursor will move the cursor to the beginning of each occurrence simultaneously so that I can perform whatever operation I wish on all the selections. Does notepad++ have something similar to this feature? I know that I can multi-line select by Ctrl+ mouse click, but I just wanting to know of an automated so to speak way of doing this in notepad++

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• WPF: OnRender and Hit Testing

  - by stefan.at.wpf

  Hello, when using OnRender to draw something on the screen, is there any way to perform Hit Testing on the drawn graphics? Sample Code protected override void OnRender(System.Windows.Media.DrawingContext drawingContext) { base.OnRender(drawingContext); drawingContext.DrawRectangle(Brushes.Black, null, new Rect(50, 50, 100, 100)); } Obviously one has no reference to the drawn Rectangle which would be necessary to perform hit testing or am I wrong about this? I know I can use DrawingVisual, I'm just curious if my understanding is correct, that using OnRender to draw something you can't perform any hit testing on the drawn things?

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• Linq to Entities : using ToLower() on NText fields

  - by Julien N

  I'm using SQL Server 2005, with a case sensitive database.. In a search function, I need to create a Linq To Entities (L2E) query with a "where" clause that compare several strings with the data in the database with these rules : The comparison is a "Contains" mode, not strict compare : easy as the string's Contains() method is allowed in L2E The comparison must be case insensitive : I use ToLower() on both elements to perform an insensitive comparison. All of this performs really well but I ran into the following Exception : "Argument data type ntext is invalid for argument 1 of lower function" on one of my fields. It seems that the field is a NText field and I can't perform a ToLower() on that. What could I do to be able to perform a case insensitive Contains() on that NText field ?

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• Query only the first detail record for each master record

  - by Neal S.

  If I have the following master-detail relationship: owner_tbl auto_tbl --------- -------- owner --- owner auto year And I have the following table data: owner_tbl auto_tbl --------- -------- john john, corvette, 1968 john, prius, 2008 james james, f-150, 2004 james, cadillac, 2002 james, accord, 2009 jeff jeff, tesla, 2010 jeff, hyundai, 1996 Now, I want to perform a query that returns the following result: john, corvette, 1968 jeff, hyundai, 1996 james, cadillac, 2002 The query should join the two tables, and sort all the records on the "year" field, but only return the first detail record for each master record. I know how to join the tables and sort on the "year" field, but it's not clear how (or if) I might be able to only retrieve the first joined record for each owner. Three related questions: Can I perform this kind of query using LINQ-to-SQL? Can I perform the query using T-SQL? Would it be best to just create a stored procedure for the query given its likely complexity?

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• Passing Parameters to Child Tasks from a Parent Task in Rake

  - by Haseeb Khan

  I am new to the world of Rake and currently writing a Rake Script which consists of various tasks depending on the arguments passed to it on runtime. From some Tutorials over the web, I figured out how to pass parameters to the Script as well how to make a task which is dependent on other subtasks. For reference, I have mentioned a sample below: task :parent, [:parent_argument1, :parent_argument2, :parent_argument3] => [:child1, :child2] do # Perform Parent Task Functionalities end task :child1, [:child1_argument1, :child1_argument2] do |t, args| # Perform Child1 Task Functionalities end task :child2, [:child2_argument1, :child2_argument2] do |t, args| # Perform Child2 Task Functionalities end Following is what I want to achieve: I want to pass the arguments passed to the parent task to the child tasks. Is it allowed? Is there a way I can make the child tasks as private so they can't be called independently? Thanks in advance.

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• How to set AeDebug to get a minidump with the name of the process ?

  - by JC Martin

  I have to perform some post mortem debugging on a C++ project. Known way to perform is to set the cdb debugger as a minidump generator and to process the dumps collects afterwards. I read nearly the whole web and I didn't find a solution to produce a minidump with the name of the process that has crashed Is there a way to set AeDebug\Debugger registry variable in such a manner that cdb generates a dump file with the name of the process ? When I encapsulate the call to cdb.exe in a batch file, it starts well but stays blocked on the symbol searching. I must perform a Ctrl+C in order to stop the batch, then the minidump, with the correct process name, is created... but of course I can't set up such a thing in an unattended production environment... Has anybody done that before ?

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• Mule Performing a string manipulation

  - by user2910309

  What is the best way to perform a string manipulation. I wish to perform a substring on a email address to extract the domain detail and populate this to a variable. a java transformer is a possibilty, but i was hoping if i could use a message enricher with a expression to perform this operation. pardon me but i am still a greenhorn on Mule. here is the excerpt from my mule flow which is failing with error cannot resolve method string length. <enricher target="#[flowVars['FromAddressDomain']]" doc:name="Message Enricher"> <expression-transformer expression="#[ payload.fromAddr.substring(payload.fromAddr.lastIndexOf('@')+ 1,payload.fromAddr.lenth())]" doc:name="Expression"></expression-transformer> </enricher>

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• Can't append to array using string field name [$] when performing update on array fields

  - by Haraldo

  rowsI am attempting to perform a mongodb update on each field in an array of records. An example schema is below: { "_id" : ObjectId("508710f16dc636ec07000022"), "summary" : "", "uid" : "ABCDEF", "username" : "bigcheese", "name" : "Name of this document", "status_id" : 0, "rows" : [ { "score" : 12, "status_id" : 0, "uid" : 1 }, { "score" : 51, "status_id" : 0, "uid" : 2 } ] } So far I have been able to perform single updates like this: db.mycollection.update({"uid":"ABCDEF","rows.uid":1}, {$set:{"rows.$.status_id":1}},false,false) However, I am struggling as to how to perform an update that will update all array records to a status_id of 1 (for instance). Below is how I imagine it should work: db.mycollection.update({"uid":"ABCDEF"}, {$set:{"rows.$.status_id":1}},false,true) However I get the error: can't append to array using string field name [$] I have tried for quite a while with no luck. Any pointers?

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• Predicting performance for an iPhone/iPod Touch App

  - by Avizz

  I don't have an iPhone Developer Program Account yet and will be getting one in the next couple of days. Can instruments be used with the simulator to give a rough estimate on how well my app may perform? Using instruments I checked and fixed all the leaks it was detecting, and it appears that my memory usage maxes out at about 5.77mb. Is there any other tests I could perform with instruments to judge how well my app would perform? I realize there is no way other then the actual device to get a definite answer, it would be nice to get an estimate.

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• CUDA small kernel 2d convolution - how to do it

  - by paulAl

  I've been experimenting with CUDA kernels for days to perform a fast 2D convolution between a 500x500 image (but I could also vary the dimensions) and a very small 2D kernel (a laplacian 2d kernel, so it's a 3x3 kernel.. too small to take a huge advantage with all the cuda threads). I created a CPU classic implementation (two for loops, as easy as you would think) and then I started creating CUDA kernels. After a few disappointing attempts to perform a faster convolution I ended up with this code: http://www.evl.uic.edu/sjames/cs525/final.html (see the Shared Memory section), it basically lets a 16x16 threads block load all the convolution data he needs in the shared memory and then performs the convolution. Nothing, the CPU is still a lot faster. I didn't try the FFT approach because the CUDA SDK states that it is efficient with large kernel sizes. Whether or not you read everything I wrote, my question is: how can I perform a fast 2D convolution between a relatively large image and a very small kernel (3x3) with CUDA?

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• Is this a valid benefit of using embedded SQL over stored procedures?

  - by George

  Here's an argument for SPs that I haven't heard. Flamers, be gentle with the down tick, Since there is overhead associated with each trip to the database server, I would suggest that a POSSIBLE reason for placing your SQL in SPs over embedded code is that you are more insulated to change without taking a performance hit. For example. Let's say you need to perform Query A that returns a scalar integer. Then, later, the requirements change and you decide that it the results of the scalar is x that then, and only then, you need to perform another query. If you performed the first query in a SP, you could easily check the result of the first query and conditionally execute the 2nd SQL in the same SP. How would you do this efficiently in embedded SQL w/o perform a separate query or an unnecessary query? Here's an example: --This SP may return 1 or two queries. SELECT @CustCount = COUNT(*) FROM CUSTOMER IF @CustCount 10 SELECT * FROM PRODUCT Can this/what is the best way to do this in embedded SQL?

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• Best way to validate a WinCE OS image (.bin) file?

  - by Ryan Clark

  We have a Windows CE 6.0 based product that allows for firmware upgrades through a web interface. I want to perform a sanity check on the new firmware image to be sure that it is valid. How should I perform the validation? I see in the BIOSLOADER code, there is support code for decoding a BIN file. I suppose I could massage that to perform the validation. Is there a better way? Thanks!

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• Performing multiple fetches in Core Data within the same view

  - by yesimarobot

  I have my CD store setup and everything is working. Once my initial fetch is performed, I need to perform several fetches based on calculations using the data from my first fetch. The examples provided from Apple are great, and helped me get everything going but I'm struggling with executing successive fetches. Any suggestions, or tutorial links are appreciated. Table View loads data from CD store. When a user taps a row it pushes a detail view The detail view loads details from CD. [THE ABOVE STEPS ARE ALL WORKING] I perform several calculations on the data fetched in the detail view. I need to then perform several other fetches based on the results of my calculations.

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• Sorting by key > 10 integer sequences. with thrust

  - by smilingbuddha

  I want to perform a sort_by_key where I have a single key-sequence and multiple value sequences. One usually performs this with sort_by_key( key, key + N, make_zip_iterator( make_tuple(x1 , x2 , ...) ) ) However I want to perform a sort with 10 sequences each of length N. Thrust does not support tuples of size = 10. So is there a way around this ? Of course one can keep a separate copy of the key vector and perform sorts on bunches of 10 sequences. But I would like to do everything in a single call.

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• Would this constructor be acceptable practice?

  - by Robb

  Let's assume I have a c++ class that have properly implemented a copy constructor and an overloaded = operator. By properly implemented I mean they are working and perform a deep copy: Class1::Class1(const Class1 &class1) { // Perform copy } Class1& Class1::operator=(const Class1 *class1) { // perform copy return *this; } Now lets say I have this constructor as well: Class1::Class1(Class1 *class1) { *this = *class1; } My question is would the above constructor be acceptable practice? This is code that i've inherited and maintaining.

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• Big-O for Eight Year Olds?

  - by Jason Baker

  I'm asking more about what this means to my code. I understand the concepts mathematically, I just have a hard time wrapping my head around what they mean conceptually. For example, if one were to perform an O(1) operation on a data structure, I understand that the amount of operations it has to perform won't grow because there are more items. And an O(n) operation would mean that you would perform a set of operations on each element. Could somebody fill in the blanks here? Like what exactly would an O(n^2) operation do? And what the heck does it mean if an operation is O(n log(n))? And does somebody have to smoke crack to write an O(x!)?

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