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  • How to initialize List<E> in empty class constructor?

    - by Nazgulled
    Hi, The following code obviously doesn't work because List<E> is abstract: public class MyList { private List<E> list; public MyList() { this.list = new List<E>(); } } How can I initialize MyList class with an empty constructor if I need the list variable to be a LinkedList or a ArrayList depending on my needs?

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  • Read -> change -> save. Thread safe.

    - by Pavel Alexeev
    This code should automatically connect players when they enter a game. But the problem is when two users try to connect at the same time - in this case 2nd user can easily overwrite changes made by 1st user ('room_1' variable). How could I make it thread safe? def join(userId): users = memcache.get('room_1') users.append(userId) memcache.set('room_1', users) return users I'm using Google App Engine (python) and going to implement simple game-server for exchanging peers given by Adobe Stratus.

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  • Help with concept - filters and number of items

    - by dreamer
    Please check http://www.alibaba.com/catalogs/cid/702/Laptops.html they have nice filter here with number of items for each. Note one detail - they have locations here. Same thing on olx.com - location and number of items for each category. Now imagine I have tables: [products] (Id, Name, CategoryId, LocationId) [Categories] (Id,Name) [Location] (Id, Name) My question how can I do the same, cause count things even with caching looks expensive? And they give results pretty fast... Please advice with possible ways to do that in ASP.NET, C#, MVC, MS SQL, but avoice simple answers like "count and change" Thank you in advance.

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  • PHP - Pass POST variables with header()?

    - by Dan
    Hi, I'm trying to use the header() function to create a redirect. I would like to display an error message. Currently I'm sending the message as a parameter through the URL, however this makes it look quite ugly. Is there a way to pass this value as a post variable instead? Any advice appreciated. Thanks.

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  • ldd output showing shared object file whose function is not called

    - by iamrohitbanga
    I ran ldd command on an executable created by Open MPI. It shows a reference to libpthread.so Using LD_PRELOAD variable I created my own implementation of pthread_create, but from the it output it seems that MPI implementation is not calling pthread_create as I had expected. Why does ldd show pthread so file in output if it is not being used? does Open MPI not use a separate MPI thread for every node to implement the functionality?

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  • xcode user script - Apple Script - Sort selected lines by length

    - by Bach
    I need to create a user scripts in xcode where I can sort a selection of multiple lines, by their length (number of characters) I know of this macro variable PBXTextLength, but not sure how to write the script. this is the sort selection script in Xcode: echo -n "%%%{PBXSelection}%%%" sort <&0 echo -n "%%%{PBXSelection}%%%" how can i modify that script to sort the selection by the length of the line (PBXTextLength)? thanks

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  • jquery tree traversing help

    - by rod
    Hi All, Given simple DOM: <form id="form1">...</form> <div> <div> <a href="#" id="export">Export</a> </div> </div> Starting with id=export, is there a way to go up a variable amount of divs and then get the closest form id? Thanks, rodchar

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  • How to discover web servers on a local network?

    - by Stefan Kendall
    Suppose I'm running several servers serving basic requests on my local network (say a home network, where all machines generally have an IP in the form K.K.K.x, where x is variable). Is there an easy way to discover all such servers? I would need to find each IP on the network running a particular java server application.

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  • How does Symfony pass members set in an action to a template?

    - by Martin Chatterton
    How does a member set inside an action... $this->foo = 'bar'; ...become a variable accessible from a template... echo $foo; // bar I would like to know how it is achieved at a framework level. There is a lot of documentation on how to use Symfony, but I've not managed to find much about how it all fits together behind the scenes (class structure/inheritance etc). Thanks in advance for your help!

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  • How do I correctly install ambethia/recaptcha with rails 3

    - by TLK
    I have done the following steps: Added to gemfile: gem "recaptcha" Added to config/initializers/recaptcha.rb Recaptcha.configure do |config| config.public_key = 'MyKeyHere' config.private_key = 'MyKeyHere' end Added to view: = raw recaptcha_tags Ran: bundle install ...then restarted server. The result? undefined local variable or method `recaptcha_tags' for #<#<Class:0x1053baaa0>:0x1053b69c8>

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  • Syntax explanation

    - by Knowing me knowing you
    In code: struct tagPaint { }Paint,//<<<--------------what's this (Paint)? *pPaint;//<<<-------------and this(*pPaint)? I mean do I declare variable with name Paint of type tagPaint and pointer called pPaint to tagPaint? Thanks.

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  • Read and write .NET Objects in SQL Database without serialization.

    - by Mohit
    Hello, I have a small query. I need to create a Caching Service of my own that will write and read .NET Objects to and from the Database. Now, I have achieved that with the help of Binary Serialization. But the Problem is I need to deliberately marked my objects as [Serializable], which makes me think that what if someone will try to add an object which is not marked as [Serializable]. Thus, I need to find a way to read and write Objects to Database without Serialization. I have one thought too.. As we all know Session can store any object in it. Now, we can make sessions to be stored in the DB, outproc. What mechanism it uses to store these objects without serializing or deserializing. Any help will be highly appreciated. Thanks. M.B

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  • JQuery AJAX responseText to JSON

    - by BoredOfBinary
    I have this script that calls a .net WebService msg = $.toJSON( $.ajax({ type: "POST", url: "http://[url]/ETS.UI/WebServices/LocationService.asmx/GetMappingLocationDetails", contentType: "application/json; charset=utf-8", data: $.toJSON({'componentId':994}), dataType: "json", async: false }).responseText ); And I recieve the following value in the msg variable: ""{\"d\":\"{\\"ComponentId\\":994,\\"Latitude\\":32.219627009236405,\\"Longitude\\":-110.96843719482422,\\"LocationName\\":\\"Tucson\\",\\"StreetAddress\\":\\"7201 E 22nd Street \\",\\"City\\":\\"Tucson\\",\\"State\\":\\"AZ\\",\\"PostalCode\\":null}\"}"" I have no idea why this would format this way, seems to only do this in responseText. Does anyone have any ideas?

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  • jquery grabbing post details and returning them to the form

    - by SoulieBaby
    Hi all, I've been trying to use jquery to grab the information from $_POST and return the user back to the actual form if their email address already exists in the system, however I can't seem to get jQuery to grab the php variable $post (which has all the information from $_POST) and spit them back to the original form. Could someone help me out please? :)

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  • how can i export some values in mysql to an php array?

    - by sebastian
    hi, here is what i'm trying to make. i want to select all the users from a table. for all of these users i want to make a for cycle. from what i know for has three statements something like so for($i=0;$i++;$i=$max) how can i put the user id's in to an array so i can define my $max variable? or can this be done in an other method? thanks,

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  • Is there an easy way to get the ServerName in Symfony?

    - by greg0ire
    I have been searching for an easy way to get the ServerName of the machine where Symfony runs in Symfony (so that my app adapts when it is used on a host with a different ServerName), but I couldn't find one. I created a variable in app.yml and I fetch it, but I still wonder if there is no easier way to do this. How are you doing this? I'm using Symfony 1.2 and 1.4 on different projects.

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  • Bad class file error when using Scala 2.8.0-rc1 in Javafx 1.2

    - by aoprisan
    When trying to import scala.Option in a javafx script, I get the following javafxc error: bad class file: scala/Option$$anonfun$orNull$1.class(scala:Option$$anonfun$orNull$1.class) undeclared type variable: A1 Please remove or make sure it appears in the correct subdirectory of the classpath. import scala.Option; ^ I am using Scala 2.8.0-RC1, Javafxc 1.2.3_b36, JVM 1.6.0_18-b07, OS Ubuntu 9.10. The same code was working in Scala 2.7.7 .

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  • Exact cin equivalent function in python

    - by gkt.pro
    Suppose user enter this string at terminal 123 456 456 //then hit enter How do I scan these three (could be more) numbers in different variables in python Could be something like this: for i in range(1,n) m[i]=#WHAT FUNCTION SHOULD I PUT HERE In c++ we can easily use cin>>m[i] inside above loop to scan the variables. If i use input() or raw_input() , they would scan whole line in single variable.

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  • Tracking/Counting Word Frequency

    - by Joel Martinez
    I'd like to get some community consensus on a good design to be able to store and query word frequency counts. I'm building an application in which I have to parse text inputs and store how many times a word has appeared (over time). So given the following inputs: "To Kill a Mocking Bird" "Mocking a piano player" Would store the following values: Word Count ------------- To 1 Kill 1 A 2 Mocking 2 Bird 1 Piano 1 Player 1 And later be able to quickly query for the count value of a given arbitrary word. My current plan is to simply store the words and counts in a database, and rely on caching word count values ... But I suspect that I won't get enough cache hits to make this a viable solution long term. Can anyone suggest algorithms, or data structures, or any other idea that might make this a well-performing solution?

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  • Encrypt Data using Public Key

    - by prithvi
    $key = file_get_contents('http://keyserver.pramberger.at/pks/lookup?op=get&search=uid'); after getting public key in '$key' variable i need to encrypt the data using this public key. the key must be start with ----Begin pgp block ---to end pgp block----. How this can be done in php?

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  • Creating a virtual, data-driven section of a Wordpress-powered site

    - by lgomez
    Hello all, I want to create a plugin for wordpress to automatically serve pages containing data pulled from a provider's API. The API returns one or more records containing data for that record and I simply want to have the plugin intercept the request, call the API with parameters pulled from the request URI and display the data using a template that I can either let them upload to the server or let them copy and paste into the plugins admin settings. For example, I may want one of my wordpress installations to show products pulled from such an API under the url "example.com/products". The plugin would catch that request, extract the variables from the URL, call the API and render the template with the returned results. I'd like to avoid requiring editing the .htaccess file like some caching plugins do. Some of the admins of these pages won't know how to do that or simply won't have access to the .htaccess file. Thanks!

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  • How to find the only UILabel in a view and hide it?

    - by tarnfeld
    I am adding a UILabel as a subview to a UIView and sometime later I want to hide it. It is assigned to a variable but I don't think setting the variables property Hidden after it's been added to the view will work (well it doesn't seem to anyway). Is there a way to loop through the subviews in a view and then find the one that has a specific tag or is of type UILabel that I could then remove?

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  • In google app engine, how to iterate through form fields (python, wsgiref.handlers)

    - by MarcoB
    Using python and wsgiref.handlers, I can get a single variable from a form with self.handler.request.get(var_name), but how do I iterate through all form variables, be they from GET and POST? Is it something like this? for field in self.handler.request.fields: value = self.handler.request.get(field) Again, it should include both fields included in the POST and fields from the query string, as in a GET request. Thanks in advance folks...

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