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• Change smtp name

  - by Misterb

  Hello, My question is probably very easy to answer but I have been struggling with this the whole day. Actually, I would like to change my smtp.mail name and account that is shown as sending the emails in the header. I changed the "From" but it shows only in the "visible" part of the email and there are values that are different in the header. In this example : Received-SPF: pass (google.com: domain of [email protected] designates 67.221.174.127 as permitted sender) client-ip=67.221.174.127; Authentication-Results: mx.google.com; spf=pass (google.com: domain of [email protected] designates 67.221.174.127 as permitted sender) [email protected]; dkim=pass (test mode) [email protected] [email protected] account=bounce Thank you in advance!

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• form checkboxes different names each into multiple rows database [closed]

  - by Darlene

  Hi i've been at this for hours and need help. Thanks in advice. i have the following tables: tblprequestion quesid| ques tblanswers answerid|quesid | ans |date This is my form: prequestion form <?php $con = mysql_connect("localhost","root","") or die ("Could not connect to DB Server"); $db_selected = mysql_select_db("nbtsdb", $con) or die("Could not locate the DB"); $query3= mysql_query("SELECT * FROM tblprequestions", $con) or die("Cannot Access prequestions description from Server"); echo"<legend> Pre question :</legend>"; echo"<p></p>"; while($row = mysql_fetch_array($query3)) { echo"<p>"; echo"<input type='checkbox' name='question".$row['quesid']."[]' value='yes' />"; echo"<label>".$row['ques']."</label>&nbsp;&nbsp;&nbsp;"; echo"</p>"; } echo"<p></p>"; ?> i would like to know how to get the values from the form for each question (total of 17) to submit into the database. for example tblprequestion quesid| ques 1 Had a cold or fever in the last week? 2 Had minor outpaient surgery? tblanswers answerid|username |quesid | ans |date 1 lisa 1 yes 10/10/12 2 lisa 2 no 10/10/12

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• Google Analytics cookie across SagePay checkout

  - by AlexCambridgeUK

  We use SagePay's Server integration for our online payments. We use Google Analytics to track activity on our website and Google Ecommerce tracking to log transactions. In Google Analytics, under the Ecommerce view, it shows direct/none for source/medium, as the 1st party cookie is lost when visiting the external SagePay checkout pages before the customer is redirected to my confirmation page which tracks the transaction. In all the answers I have viewed when searching for a solution, the suggestion is to alter the tracking code to read _gaq.push(['_setDomainName', 'none']); _gaq.push(['_setAllowLinker', true]); but this needs to be implemented on all pages, including 3rd party domains (SagePay). As SagePay don't allow javascript in their template customisation, what can I do? Is there another way? Edit: I just found this code: var pageTracker = _gat._getTracker('UA-XXXXX-X'); pageTracker._setCampNameKey('ga_campaign'); // name pageTracker._setCampMediumKey('ga_medium'); // medium pageTracker._setCampSourceKey('ga_source'); // source pageTracker._setCampNOKey('ga_nooverride'); // don't override pageTracker._trackPageview(); Could I store pre-checkout values for source/campaign/medium to a cookie and the retrieve it post-checkout into the code above, or would this start a new tracking session?

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• Oracle E-Business Suite (WebADI) integration with Oracle Open Office

  - by Harald Behnke

  Another highlight of the new Oracle Open Office Release 3.3 enterprise features is the Oracle E-Business Suite Release 12.1 (WebADI) integration. The WebADI integration in Oracle Open Office for Windows allows you to bring your Oracle E-Business Suite data into an Oracle Open Office Calc spreadsheet, where familiar data entry and modeling techniques can be used to complete your E-Business Suite tasks. You can create formatted spreadsheets on your desktop that allow you to download, view, edit, and create Oracle E-Business Suite data. Use data entry shortcuts (such as copying and pasting or dragging and dropping ranges of cells), or Calc's Open Document Format (ODF V1.2) compliant spreadsheet formulas, to calculate amounts to save time. You can combine speed and accuracy by invoking lists of values for fields within the spreadsheet. After editing the spreadsheet, you can use WebADI's validation functionality to validate the data before uploading it to the Oracle E-Business Suite. Validation messages are returned to the spreadsheet, allowing you to identify and correct invalid. This video shows a hands-on demonstration of the Oracle E-Business Suite integration: Read more about the Oracle Open Office enterprise features.

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• NHibernate Pitfalls: Loading Foreign Key Properties

  - by Ricardo Peres

  This is part of a series of posts about NHibernate Pitfalls. See the entire collection here. When saving a new entity that has references to other entities (one to one, many to one), one has two options for setting their values: Load each of these references by calling ISession.Get and passing the foreign key; Load a proxy instead, by calling ISession.Load with the foreign key. So, what is the difference? Well, ISession.Get goes to the database and tries to retrieve the record with the given key, returning null if no record is found. ISession.Load, on the other hand, just returns a proxy to that record, without going to the database. This turns out to be a better option, because we really don’t need to retrieve the record – and all of its non-lazy properties and collections -, we just need its key. An example: 1: //going to the database 2: OrderDetail od = new OrderDetail(); 3: od.Product = session.Get<Product>(1); //a product is retrieved from the database 4: od.Order = session.Get<Order>(2); //an order is retrieved from the database 5:  6: session.Save(od); 7:  8: //creating in-memory proxies 9: OrderDetail od = new OrderDetail(); 10: od.Product = session.Load<Product>(1); //a proxy to a product is created 11: od.Order = session.Load<Order>(2); //a proxy to an order is created 12:  13: session.Save(od); So, if you just need to set a foreign key, use ISession.Load instead of ISession.Get.

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• httpd.conf variables : What is the difference between ${var} and %{var}?

  - by 108.im

  What is the difference between ${var} and %{var} in httpd.conf? How and when would one use ${} and %{}? http://httpd.apache.org/docs/2.4/configuring.html mentions : The values of variables defined with the Define of or shell environment variables can be used in configuration file lines using the syntax ${VAR}. http://httpd.apache.org/docs/2.4/mod/mod_rewrite.html mentions: Server-Variables:These are variables of the form %{ NAME_OF_VARIABLE } and RewriteMap expansions:These are expansions of the form ${mapname:key|default}. Will ${VAR} be used everywhere in httpd.conf, except in mod_rewrite directive's (like RewriteCond, RewriteRule but except for RewriteMap expansions which use ${} as in RewriteRule ^/ex/(.*) ${examplemap:$1} ) Would a variable set in httpd.conf using SetEnvIf Directive, for use in same httpd.conf, be used as ${var} except when the variable is used with mod_rewrite directive's, where the variable would be used as %{var}?

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• javascript fixed timestep gameloop with requestanimation frame

  - by coffeecup

  hello i just started to read through several articles, including http://gafferongames.com/game-physics/fix-your-timestep/ ...://gamedev.stackexchange.com/questions/1589/fixed-time-step-vs-variable-time-step/ ...//dewitters.koonsolo.com/gameloop.html ...://nokarma.org/2011/02/02/javascript-game-development-the-game-loop/index.html my understanding of this is that i need the currentTime and the timeStep size and integrate all states to the next state the time which is left is then passed into the render function to do interpolation i tried to implement glenn fiedlers "the final touch", whats troubling me is that each FrameTime is about 15 (ms) and the update loop runs at about 1500 fps which seems a little bit off? heres my code this.t = 0 this.dt = 0.01 this.currTime = new Date().getTime() this.accumulator = 0.0 this.animate() animate: function(){ var newTime = new Date().getTime() , frameTime = newTime - this.currTime , alpha if ( frameTime > 0.25 ) frameTime = 0.25 this.currTime = newTime this.accumulator += frameTime while (this.accumulator >= this.dt ) { this.prev_state = this.curr_state this.update(this.t,this.dt) this.t += this.dt this.accumulator -= this.dt } alpha = this.accumulator / this.dt this.render( this.t, this.dt, alpha) requestAnimationFrame( this.animate ) } also i would like to know, are there differences between glenn fiedlers implementation and the last solution presented here ? gameloop1 gameloop2 [ sorry couldnt post more than 2 links.. ] edit : i looked into it again and adjusted the values this.currTime = new Date().getTime() this.accumulator = 0 this.p_t = 0 this.p_step = 1000/100 this.animate() animate: function(){ var newTime = new Date().getTime() , frameTime = newTime - this.currTime , alpha if(frameTime > 25) frameTime = 25 this.currTime = newTime this.accumulator += frameTime while(this.accumulator >= this.p_step){ // prevstate = currState this.update() this.p_t+=this.p_step this.accumulator -= this.p_step } alpha = this.accumulator / this.p_step this.render(alpha) requestAnimationFrame( this.animate ) now i can set the physics update rate, render runs at 60 fps and physics update at 100 fps, maybe someone could confirm this because its the first time i'm playing around with game development :-)

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• MySQL Connect Conference: My Experience

  - by Hema Sridharan

  It was a great experience to attend the MySQL Connect Conference for the first time ever. Personally I was very much enthralled to present about "How to make MySQL Backups" besides attending different sessions to absorb more knowledge about the technical prospects of MySQL. One of the agenda items in my presentation was "MySQL Enterprise Backup" functionality and features. There were total of 40 attendees in the session, who were very much interested about the MySQL Enterprise Backup product and gave positive feedback as well as areas of improvements on our product. Some of our features brought lot of excitement and smile amongst our customers including,1. Performance improvements in MEB 3.8.02. Incremental Base option from MEB 3.7.1 where there is no need to specify the directory name of the previous backup to fetch the lsn values and instead can directly fetch from backup_history table using --incremental-base=history: last_backup3. only-innodb-with-frm option introduced in MEB 3.7 version. A true online hot backup of InnoDB tables.I also attended a session with similar topic "MEB Best Practices" conducted by Sanjay Manwani, where he double clicked all the features and best strategies of backup & restore. I also got an opportunity to attend other sessions including,* Enabling the new generation of web and cloud services with MySQL 5.6 replication* Getting the most out of MySQL with MySQL Workbench* InnoDB compression for OLTP* Scaling for the Web and Cloud with MySQL replication.Above all, had some special moments in the conference including meeting some of the executives / colleagues for the first time f2f. On a whole, the first MySQL Connect conference was a great success in terms of manifesting the features of our products, direct feedback from customer and team building.  We also had some applauding yahoo moments when Tomas Ulin announced different releases including MySQL 5.6 RC, Connector Python 1.0 and ODBC 5.2 release, MySQL Cluster 7.3, additions to MySQL Enterprise edition etc.

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• Formalizing a requirements spec written in narrative English

  - by ProfK

  I have a fairly technical functionality requirements spec, expressed in English prose, produced by my project manager. It is structured as a collection of UI tabs, where the requirements for each tab are expressed as a lit of UI fields and a list of business rules for the tab. Most business rules are for UI fields on a tab, e.g: a) Must be alphanumeric, max length 20. b) Must be a dropdown, with values from table x. c) Is mandatory. d) Is mandatory under certain conditions, e.g. another field is just populated, or has a specific value. Then other business rules get a little more complex. The spec is for a job application, so the central business object (table) is the Applicant, and we have several other tables with one-to-many relationships with applicant, such as Degree, HighSchool, PreviousEmployer, Diploma, etc. e) One such complex rule says a status field can only be assigned a certain value if a many-side record exists in at least one of the many-side tables. E.g. the Applicant has at least one HighSchool or at least one Diploma record. I am looking for advice on how to codify these requirements into a more structured specification defined in terms of tables, fields, and relationships, especially for the conditional rules for fields and for the presence of related records. Any suggestions and advice will be most welcome, but I would be overjoyed if i could find an already defined system or structure for expressing things like this.

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• Excel formula - sometimes array formula, sometimes not

  - by Jonas

  I want to write some data to an Excel file, and I want the first page to show a summary of the data that are spread all over the sheets. The individual data items on a sheet can be included or excluded, and I want the summary to be calculated only on the included values. Thus, I thought I'd use a formula like this to show, for example, an average (for which empty fields shouldn't be counted, either): =AVERAGE(IF('dataSheet1'!$B:$B=1,IF('dataSheet1'!$I:$I<>"",'dataSheet1'!$I:$I,""),"")) If I have this formula in dataSheet1, everything works fine. If I have this formula in the summary sheet, I need to enter it as an array formula, and I have to specify the exact ranges to make it work. Is there a way (aside from adding the average in dataSheet, and then referencing the result in summary) to make the formula work without having it turn into an array formula?

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• Value of the HTML5 lang attribute

  - by user359650

  I'm working on a website which will offer localized content following the language+region approach as described on this W3.org page (e.g. fr-CA for Canadian French content, and fr-FR for "French French" content). As we consider content for each language+region to be unique, it is crucial to us that search engines properly identify and serve the content accordingly. By looking up on the Internet (e.g. this question), it appears that most people recommend the use of an ISO639 language code in the HTML lang attribute to describe the content language. Following this recommendation, we would en up using <html lang="fr"> which wouldn't enable the differentiation between the aforementioned language+region combinations. When reviewing the HTML4 specification, it seems that using language+region as a language code would be perfectly OK, as the en-US example is given as one possible value. However I couldn't find any confirmation of this in the HTML5 specification which doesn't seem to provide any example as to the possible allowed values. From there I tried to get a de facto answer by looking at what the web giants are doing. I looked at what Facebook are doing: they offer Candian French and French French versions of their websites with (slightly) different content, whilst the HTML lang value remains the same: fr-CA URL: http://fr-ca.facebook.com HTML lang attribute: <html lang="fr"> translation of the word 'email': courriel fr-FR URL: http://fr-fr.facebook.com/ HTML lang attribute: <html lang="fr"> translation of the word 'email': Adresse électronique Q: What is the recommended/standard way of describing content that was localized using the language+region approach in HTML5 ?

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• VB6 network errors Windows 2008 run on ESX VMWare

  - by hivedome

  We have an application built in vb6, the executables for the application are run locally on a Windows 2008 Terminal Server the dll's for the application are located on a network share. Intermittently parts of the application crash with inpage errors.. we realise the .dll it references then copy that dll locally to the windows 2008 server and register the application can then run again alternatly we reboot the server and all ok. ideally we do not want the exec's or dll's on local server, they should be located on network share for other Terminal Servers to access. error values we receive are C0000203 C00000C4 I have disabled windows 2008 UAC and DEP.. Has anyone experienced this type of behaviour in 2008?

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• Why is TDD not working here?

  - by TobiMcNamobi

  I want to write a class A that has a method calculate(<params>). That method should calculate a value using database data. So I wrote a class Test_A for unit testing (TDD). The database access is done using another class which I have mocked with a class, let's call it Accessor_Mockup. Now, the TDD cycle requires me to add a test that fails and make the simplest changes to A so that the test passes. So I add data to Accessor_Mockup and call A.calculate with appropriate parameters. But why should A use the accessor class at all? It would be simpler (!) if the class just "knows" the values it could retrieve from the database. For every test I write I could introduce such a new value (or an if-branch or whatever). But wait ... TDD is more. There is the refactoring part. But that sounds to me like "OK, I can do this all with a big if-elseif construct. I could refactor it using a new class ... but instead I make use of the DB accessor and do this in a totally different way. The code will not necessarily look better afterwards but I know I WANT to use the database".

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• How can a single script attached to multiple enemies provide separate behavior for each enemy?

  - by Syed

  I am making a TD game and now stucked at multiple enemies using same script. All is well with scripts attached with one enemy only. Problem is in running multiple enemies. Here is the overview. I have a Enemy object with which I have attached a 'RunEnemy' script. Flow of this script is: RunEnemy.cs: PathF p; p = gameObject.GetComponent<PathF>(); //PathF is a pathfinding algo which has 'search; function which returns a array of path from starting position PathList = p.search(starting position); //------------------------------- if(PathList != null) { //if a way found! if(moving forward) transform.Translate(someXvalue,0,0); //translates on every frame until next grid point else if(moving back) transform.Translate(0,someXvalue,0); ...and so on.. if(reached on next point) PathList = p.search(from this point) //call again from next grid point so that if user placed a tower enemy will run again on the returned path } Now I have attached this script and "PathF.cs" to a single enemy which works perfect. I have then made one more enemy object and attached both of these script to it as well, which is not working they both are overlapping movements. I can't understand why, I have attached these scripts on two different gameobjects but still their values change when either enemy changes its value. I don't want to go with a separate script for each enemy because there would be 30 enemies in a scene. How can I fix this problem?

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• apply seach criteria to whole cells

  - by Tom

  I am trying to use MATCH() and/or LOOKUP() in LibreOffice Calc. I have the "Search criteria = and < must apply to whole cells" and the "Enable regular expressions in formulas" options selected. The item I am looking for is a multi word string. How do I provide a search criteria as a cell reference (E3) in to LOOKUP(E3, B1:B20, C1:C20) and have it match the value in B1:B20 EXACTLY? Right now it is matching partial strings rather than matching the cell values exactly.

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• Bash script not adding variables to session

  - by travega

  I have a bash script that I have added as a startup application. It does a bunch of exports and alias assignment. #! /bin/bash alias devhm='cd ${DEV_HOME}; ll'; alias wlhm='cd ${WL_HOME}; ll'; alias dirch='watch --interval=1 "ls -la"'; alias vols='watch --interval=1 "df -h"'; alias svn-update='svn update --depth infinity ./*'; alias mci="~/mci.sh"; alias vncserver="vncserver -geometry 1680x1050"; alias ..="cd .."; alias hist="history | grep "; export PROXY_HOST=proxy.my.setup; export PROXY_PORT=3128; export LD_LIBRARY_PATH=$LD_LIBRARY_PATH/usr/lib/oracle/12.1/client64/lib; export ORACLE_HOME=/usr/lib/oracle/12.1/client64; export TNS_ADMIN=${ORACLE_HOME}/network/admin; echo "DONE!"; But none of these values are available in my terminal sessions anymore. Even when I run the script straight into the terminal like so: ./setup.sh I see the "DONE!" prompt printed but no aliases or env variables are set. If I copy and paste the contents of the file into the terminal the aliases and env variables are set. I have tried adding a line to execute the script from .bashrc also but still no aliases or env variables set. Any ideas what might be going on here? Also could anyone suggest a better way to have these env variables/aliases added to every terminal session?

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• Triangulation A* (TA*) pathfinding algorithm

  - by hyn

  I need help understanding the Triangle A* (TA*) algorithm that is described by Demyen in his paper Efficient Triangulation-Based Pathfinding, on pages 76-81. He describes how to adapt the regular A* algorithm for triangulation, to search for other possibly more optimal paths, even after the final node is reached/expanded. Regular A* stops when the final node is expanded, but this is not always the best path when used in a triangulated graph. This is exactly the problem I'm having. The problem is illustrated on page 78, Figure 5.4: I understand how to calculate the g and h values presented in the paper (page 80). And I think the search stop condition is: if (currentNode.fCost > shortestDistanceFound) { // stop break; } where currentNode is the search node popped from the open list (priority queue), which has the lowest f-score. shortestDistanceFound is the actual distance of the shortest path found so far. But how do I exclude the previously found paths from future searches? Because if I do the search again, it will obviously find the same path. Do I reset the closed list? I need to modify something, but I don't know what it is I need to change. The paper lacks pseudocode, so that would be helpful.

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• Using Umbraco&rsquo;s Dropdown Datatype

  - by MightyZot

  In Umbraco, you could consider document types like models and data types as property types for those modes. For example, you may create a document type called “Prices” to represent a page that displays a list of prices. And, then, you might create a document type called “Price Item” to represent the price list items. A property called “Price” could then represent the price of an item. When you create the Price property, you specify the data type, which in this case might be “Number”, indicating that this particular field accepts only numerical values. Consequently, you could also create a drop down list property called “Category”, allowing you to categorize the items in your price list. To add items to the drop down list, you modify the data type definition in the Developer module of the Umbraco administrative utility. Instead of modifying the drop down data type itself, you should first make a copy by right-clicking on the Data Types node and choosing Create. Give your new data type a name in the Create dialog and click the Create button. In the Edit datatype dialog, change “Render control” to “Dropdown list”.  To add your list items, simply enter that value into the textbox next to “Add prevalue” and click Save or press the Enter key. Now that you have a new drop down list data type created, along with assigned list items, you can use it in your document type definitions just like you would the other data types.

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• Two-state script monitor not auto-resolving in SCOM

  - by DeliriumTremens

  This script runs, and if it returns 'erro' an alert is generated in SCOM. The alert is set to resolve when the monitor returns to healthy state. I have tested the script with cscript and it returns the correct values in each state. I'm baffled as to why it generates an alert on 'erro' but will not auto-resolve on 'ok': Option Explicit On Error Resume Next Dim objFSO Dim TargetFile Dim objFile Dim oAPI, oBag Dim StateDataType Dim FileSize Set oAPI = CreateObject("MOM.ScriptAPI") Set oBag = oAPI.CreatePropertyBag() TargetFile = "\\server\share\file.zip" Set objFSO = CreateObject("scripting.filesystemobject") Set objFile = objFSO.GetFile(TargetFile) FileSize = objFile.Size / 1024 If FileSize < 140000 Then Call oBag.AddValue("State", "erro") Else Call oBag.AddValue("State", "ok") End If Call oAPI.AddItem(oBag) Call oAPI.Return(oBag) Unhealthy expression: Property[@Name='State'] Equals erro Health expression: Property[@Name='State'] Equals ok If anyone can shed some light onto what I might be missing, that would be great!

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• SQL SERVER – Difference between DATABASEPROPERTY and DATABASEPROPERTYEX

  - by pinaldave

  Earlier I asked a simple question on Facebook regarding difference between DATABASEPROPERTY and DATABASEPROPERTYEX in SQL Server. You can view the original conversation there over here. The conversion immediately became very interesting and lots of healthy discussion happened on facebook page. The best part of having conversation on facebook page is the comfort it provides and leaner commenting interface. Question Question from SQLAuthority.com: What is the difference between DATABASEPROPERTY and DATABASEPROPERTYEX in SQL Server? Answer Answer from Rakesh Kumar: DATABASEPROPERTY is supported for backward compatibility but does not provide information about the properties added in this release. Also, many properties supported by DATABASEPROPERTY have been replaced by new properties in DATABASEPROPERTYEX.- source (MSDN). Answer from Alphonso Jones: The only real difference I can see is one, the number of properties contained and the other is that EX returns a sql_variant while DATABASEPROPERTY returns only int. Answer from Ambati Venkatasiva: Both are system meta data functions. DATABASEPROPERTYEX Returns the current setting of the specified database option. DATABASEPROPERTYEX returns the sq-varient value and DATABASEPROPERTY returns integer value. Answer from Rama Sankar Molleti:  Here is the best example about databasepropertyex SELECT DATABASEPROPERTYEX('dbname', 'Collation') Result SQL_1xCompat_CP850_CI_AS Whereas with databaseproperty it retuns nothing as the return type for this is integer. Sql_variant datatype stores values of various sql server supported datatypes except text, ntext, image and timestamp. Answer from Alok Seth:  SELECT DATABASEPROPERTYEX('AdventureWorks', 'Status') DatabaseStatus_DATABASEPROPERTYEX GO --Result - ONLINE SELECT DATABASEPROPERTY('AdventureWorks', 'Status') DatabaseStatus_DATABASEPROPERTY GO --Result - NULL Summary Use DATABASEPROPERTYEX as it is the only function supported in future version as well it returns status of various database properties which does not exists with DATABASEPROPERTY. Reference: Pinal Dave (http://blog.sqlauthority.com) Filed under: PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, T SQL, Technology

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• Are Get-Set methods a violation of Encapsulation?

  - by Dipan Mehta

  In an Object oriented framework, one believes there must be strict encapsulation. Hence, internal variables are not to be exposed to outside applications. But in many codebases, we see tons of get/set methods which essentially open a formal window to modify internal variables that were originally intended to be strictly prohibited. Isn't it a clear violation of encapsulation? How broadly such a practice is seen and what to do about it? EDIT: I have seen some discussions where there are two opinions in extreme: on one hand people believe that because get/set interface is used to modify any parameter, it does qualifies not be violating encapsulation. On the other hand, there are people who believe it is does violate. Here is my point. Take a case of UDP server, with methods - get_URL(), set_URL(). The URL (to listen to) property is quite a parameter that application needs to be supplied and modified. However, in the same case, if the property like get_byte_buffer_length() and set_byte_buffer_length(), clearly points to values which are quite internal. Won't it imply that it does violate the encapsulation? In fact, even get_byte_buffer_length() which otherwise doesn't modify the object, still misses the point of encapsulation, because, certainly there is an App which knows i have an internal buffer! Tomorrow, if the internal buffer is replaced by something like a *packet_list* the method goes dysfunctional. Is there a universal yes/no towards get set method? Is there any strong guideline that tell programmers (specially the junior ones) as to when does it violate encapsulation and when does it not?

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• How to ignore query parameters in web cache?

  - by eduardocereto

  Google Analytics use some query parameters to identify campaigns and to do cookie control. This is all handled by javascript code. Take a look at the following example: http://www.example.com/?utm_source=newsletter&utm_medium=email&utm_ter m=October%2B2008&utm_campaign=promotion This will set cookies via JavaScript with the right campaign origin. This query parameters can have multiple and sometimes random values. Since they are used as cache hash keys the cache performance is heavily degraded in some scenarios. I suppose there's a not so hard configuration on cache servers to just ignore all query parameters or specific query parameters. Am I right? Does anyone know how hard is it in popular web cache solutions, to create ? I'm not interested in a specific web cache solution. It would be great to hear about the one you use.

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• What is the advantage of currying?

  - by Mad Scientist

  I just learned about currying, and while I think I understand the concept, I'm not seeing any big advantage in using it. As a trivial example I use a function that adds two values (written in ML). The version without currying would be fun add(x, y) = x + y and would be called as add(3, 5) while the curried version is fun add x y = x + y (* short for val add = fn x => fn y=> x + y *) and would be called as add 3 5 It seems to me to be just syntactic sugar that removes one set of parentheses from defining and calling the function. I've seen currying listed as one of the important features of a functional languages, and I'm a bit underwhelmed by it at the moment. The concept of creating a chain of functions that consume each a single parameter, instead of a function that takes a tuple seems rather complicated to use for a simple change of syntax. Is the slightly simpler syntax the only motivation for currying, or am I missing some other advantages that are not obvious in my very simple example? Is currying just syntactic sugar?

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• Where to set permissions to all server for logon trigger on sql server 2005

  - by Jay

  I need to keep track of the last login time for each user in our SQL Server 2005 database. I created a trigger like this: CREATE TRIGGER LogonTimeStamp ON ALL SERVER FOR LOGON AS BEGIN IF EXISTS (SELECT * FROM miscdb..user_last_login WHERE user_id = SYSTEM_USER) UPDATE miscdb..user_last_login SET last_login = GETDATE() WHERE user_id = SYSTEM_USER ELSE INSERT INTO miscdb..user_last_login (user_id,last_login) VALUES (SYSTEM_USER,GETDATE()) END; go This trigger works for servers that are system admins but it won't allow regular users to login. I have granted public select,insert and update to the table but that doesn't seem to be the issue. Is there a way to set permissions on the trigger? Is there something else I am missing? Thanks

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• Find The Bug

  - by Alois Kraus

  What does this code print and why?             HashSet<int> set = new HashSet<int>();             int[] data = new int[] { 1, 2, 1, 2 };             var unique = from i in data                          where set.Add(i)                          select i;   // Compiles to: var unique = Enumerable.Where(data, (i) => set.Add(i));             foreach (var i in unique)             {                 Console.WriteLine("First: {0}", i);             }               foreach (var i in unique)             {                 Console.WriteLine("Second: {0}", i);             }   The output is: First: 1 First: 2 Why is there no output of the second loop? The reason is that LINQ does not cache the results of the collection but it does recalculate the contents for every new enumeration again. Since I have used state (the Hashset does decide which entries are part of the output) I do arrive with an empty sequence since Add of the Hashset will return false for all values I have already passed in leaving nothing to return a second time. The solution is quite simple: Use the Distinct extension method or cache the results by calling .ToList() or ToArray() for the result of the LINQ query. Lession Learned: Do never forget to think about state in Where clauses!

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