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  • Multilevel asynchronous method call pattern in c#

    - by michajas
    Hi, I have design problem regarding async calls to method. I'd like to know best/good pattern to call async method, which calls another async method, which calls another async method :) In other words, I have WCF service reference created with async methods and I want to call them from another async method which is called by other async method. All this for non blocking GUI. Thanks!

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  • php http pipeline

    - by asaf
    Hi! I'm trying to get timestamp on beginRequest and on endRequest when processing an http request using php. I know how to do it on asp.net (using httpModules and the finction beginRequest and endRequest). Does anyone know if this option is available on php and guide me how to do it? (I'm not looking for a solution, just some guiding or good reference because i couldn't find any...)

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  • How would I change this Query builder from Kohana 2.4 to Kohana 3?

    - by Thorpe Obazee
    I have had this website built for a few months and I am just getting on Kohana 3. I'd just like to convert this K2.4 query builder to K3 query builder. return DB::select(array('posts.id', 'posts.created', 'posts.uri', 'posts.price', 'posts.description', 'posts.title', 'image_count' => db::expr('COUNT(images.id)'))) ->from('posts') ->join('images')->on('images.post_id', '=', 'posts.id') ->group_by(array('posts.id')) ->order_by('posts.id', 'DESC') ->limit($limit) ->offset($offset) ->execute();

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  • MySQL subqueries

    - by swamprunner7
    Can we do this query without subqueries? SELECT login, post_n, (SELECT SUM(vote) FROM votes WHERE votes.post_n=posts.post_n)AS votes, (SELECT COUNT(comments.post_n) FROM comments WHERE comments.post_n=posts.post_n)AS comments_count FROM users, posts WHERE posts.id=users.id AND (visibility=2 OR visibility=3) ORDER BY date DESC LIMIT 0, 15 tables: Users: id, login Posts: post_n, id, visibility Votes: post_n, vote id — it`s user id, Users the main table.

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  • Creating SVG map from geometry stored in MySQL

    - by Barnabe
    I have a group of geometries stored in MySQl (as polygon and as well-known text) representing counties. I can build a table of geometries and color codes after querying some county data (say GDP per capita). What is the best way to export this as an SVG map? I cannot find any reference to SVG conversion in the MySQL documentation.

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  • Start with Java (JVM) ecosystem

    - by Kaveh Shahbazian
    I have came from another question to this one: How can one start with Java (JVM) ecosystem? What are beginner, intermediate and advanced knowledge-bases (bags!)? To be honest Java ecosystem was always a bit confusing to me, so it would be very helpful to provide some "reference references" and "defacto tutorials" for learning (curve!) JVM. I am a C# developer (WPF, Windows Forms, ASP.NET, Web Services, ... like that).

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  • java web application best practices

    - by Bruce
    Hi all I'm trying to figure out the optimum way to develop and release a fairly simple web application, and I'm running into several problems. I'll outline the decisions I've made, because somewhere I've clearly gone off the rails.. Hugely grateful for any help! I have what I think is a fairly simple web application. It contains a couple of jsps that reference a couple of java beans, and the usual static html, js, css and images. Decision 1) I wanted to have a clear and clean release procedure, such that I could develop on my local machine and then release reliably to a production machine. I therefore made the decision to package the application into a war file (including all the static resources), to minimize the separate bits and pieces I would need to release. So far so good? Decision 2) I wanted things on my local machine to be as similar as possible to the production environment. So in my html, for example, I may have a reference to a static file such as http://static.foo.com/file . To keep this code working seamlessly on dev and prod, I decided to put static.foo.com in my /etc/hosts when developing locally, so that all the urls work correctly without changing anything. Decision 3) I decided to use eclipse and maven to give me a best practice environment for administering and building my project. So I have a nice tight set up now, except that: Every time I want to change anything in development, like one line in an html file, I have to rebuild the entire project and then wait for tomcat to load the war before I can see if it's what I wanted. So my questions are: 1) Is there a way to connect up eclipse and tomcat so that I don't have to rebuild the war each time? ie tomcat is looking straight at my actual workspace to serve up the static files? 2)I think I'm maybe making things harder by using /etc/hosts to reflect production urls - is there a better way that doesn't involve manually changing over urls (relative urls are fine of course, but where you have many subdomains, say one for static files and one for dynamic, you have to write out the full path, surely?) 3) Is this really best practice?? How do people set things up so that they balance the requirement for an automated, all-encompassing build process on the one hand, and the speed and flexibility to be able to develop javascript and html and css quickly, as quickly as if one just pointed apache at the directory and developed live? What do people find works? Many thanks!

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  • SQL query for active users

    - by user344513
    This SQL query gives me today's number of users active in the last 30 days: SELECT COUNT(*) FROM table.users WHERE creation_tsz >= (now() - interval '30 days') How can I modify it to get not a single value, but a table of active users for a range of dates? Thanks, Rob

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  • popups in asp.net

    - by Surya sasidhar
    hi, i want to display the pop ups in asp.net page like how the stack over flow show the pop ups on the top of the site (you get the new answer for the question like that in a orange color) how can i write the code is there any free source code or any reference. thank you

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  • SQL dynamic date but fixed time query

    - by Marko Lombardi
    I am trying to write a sql query like the example below, however, I need it to always choose the DateEntered field between the current day's date at 8:00am and the current day's date at 4:00pm. Not sure how to go about this. Can someone please help? SELECT OrderNumber , OrderRelease , HeatNumber , HeatSuffix , Operation , COUNT(Operation) AS [Pieces Out of Tolerance] FROM Alerts WHERE (Mill = 3) AND (DateEntered BETWEEN GetDate '08:00' AND GetDate '16:00') GROUP BY OrderNumber, OrderRelease, HeatNumber, HeatSuffix, Operation

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  • Peek ahead when iterating an array in PHP 5.2

    - by pako
    Is it possible to "peek ahead" while iterating an array in PHP 5.2? For example, I often use foreach to manipulate data from an array: foreach($array as $object) { // do something } But I often need to peek at the next element while going through the array. I know I could use a for loop and reference the next item by it's index ($array[$i+1]), but it wouldn't work for associative arrays. Is there any elegant solution for my problem, perhaps involving SPL?

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  • GridView in ASP.NET 2.0

    - by Subho
    How can I populate an editable Grid with data from different tables from MSSQL Server'05 writing a code behind function??? I have used: Dim conn As New SqlConnection(conn_web) Dim objCmd As New SqlDataAdapter(sql, conn) Dim oDS As New DataSet objCmd.Fill(oDS, "TAB") Dim dt As DataTable = oDS.Tables(0) Dim rowCount As Integer = dt.Rows.Count Dim dr As DataRow = dt.NewRow() If rowCount = 0 Then e.DataSource = Nothing e.DataBind() e.Focus() Else e.DataSource = dt e.DataBind() End If

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  • What's CFRunLoop?

    - by Boon
    I would like to understand run loop more in-depth than what the reference provides. Is there resources out there that discuss this in greater details?

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  • How to lock a table for inserting in sql?

    - by Nandini
    hi, i have a web application in which i have a page named 'Data'.Many people will try to insert data into the table at a given time.So the reference no other than the primary key will get duplicated which should not be permitted.For inserting the data into the DB table, i am using a stored procedure in SQL.In my vb.net web application, i am using Business layer with enterprise library for calling the stored procedure.Now i want to lock the table for inserting so that when multiple user inserts, there wont be any complication.How can i do this?Please advice Regards

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  • Calculated group-by fields in MongoDB

    - by Navin Viswanath
    For this example from the MongoDB documentation, how do I write the query using MongoTemplate? db.sales.aggregate( [ { $group : { _id : { month: { $month: "$date" }, day: { $dayOfMonth: "$date" }, year: { $year: "$date" } }, totalPrice: { $sum: { $multiply: [ "$price", "$quantity" ] } }, averageQuantity: { $avg: "$quantity" }, count: { $sum: 1 } } } ] ) Or in general, how do I group by a calculated field?

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  • Nested Usercontrols and ViewState

    - by Bob Smith
    I have a UserControlParent that dynamically loads UserControlChild. In the UserControlChild, I store a value using the ViewState object by doing a ViewState["count"] = myCount; On Postbacks, the ViewState returns a null. Is this because the UserControlChild is being loaded dynamically? If it helps, the UserControlParent is loaded dynamically in the ASPX page as well.

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  • Basic GUI Event Handling Questions C#

    - by JHarley1
    Good Afternoon, I have some very basic questions on GUI Event Handling. Firstly with C# how can we link events to objects - I am guessing event handlers? If so can each handler use separate code? - How can the event handler locate the objects it must manipulate? I have a rough idea of how it works in JAVA. Pointing me towards a reference would be fine - I have already trawled Google for answers to no avail. Many Thanks, J

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  • Is it possible to use Boehm garbage collector only for the part of the program?

    - by bialix
    I've read article in LinuxJournal about Boehm-Demers-Weiser garbage collector library. I'm interesting to use it in my library instead of my own reference counting implementation. I have only one question: is it possible to use gc only for my shared library and still use malloc/free in the main application? I'm not quite understand how gc checks the heap so I'm worrying about performance of gc in that case and possible side effects.

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  • SQL Server Native Client API examples

    - by ebasconp
    Hi everybody: I am writing a C++ application that needs to execute SQL queries in a SQL Server DB and I want to do it using SQL Server Native Client. The MSDN documentation has no a full reference on it and has a few examples so I am looking for some site having more information on how to connect, execute queries and retrieve results using this API. Do you guys know where can I more info on it? Thanks in advance, Ernesto

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