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  • how do you reuse a partial view with setting different ids

    - by oo
    i have a partial view with a dropdown in it. the code looks like this: <%=Html.DropDownListFor(x => Model.Exercises, new SelectList(Model.Exercises, "Id", "Name", Model.SelectedExercise), new { @id = "exerciseDropdown", @class = "autoComplete" })%> the issue is that i want to reuse this partial view in multiple places but i want to have a different id assigned to the control (instead of exerciseDropdown always) but on the outside i only have this . . <% Html.RenderPartial("ExerciseList", Model); %> is there anyway to pass in an id into a partial view. is there a standard way to inject the ids into a partial view ? right now i am doing things like this: <% Html.RenderPartial("ExerciseList", Model); %> <% Html.RenderPartial("ExerciseList2", Model); %> where ExerciseList and ExerciseList2 are identical but with different ids but i am sure there is a better way.

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  • jQuery Event Keypress: Which key was pressed?

    - by BlaM
    With jQuery, how do I find out which key was pressed when I bind to the keypress event? $('#searchbox input').bind('keypress', function(e) {}); I want to trigger an submit when ENTER is pressed. [Update] Even though I found the (or better: one) answer myself, there seems to be some room for variation ;) Is there a difference between keyCode and which - especially if I'm just looking for ENTER, which will never be a unicode key? Do some browsers provide one property and others provide the other one?

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  • How do I design a cryptographic hash function?

    - by Eyal
    After reading the following about why one-way hash functions are one-way, I would like to know how to design a hash function. http://stackoverflow.com/questions/1038307/help-me-better-understand-cryptographic-hash-functions/1047106#1047106 Before everyone gets on my case: Yes, I know that it's a bad idea to not use a proven and tested hash function. I would still like to know how it's done. I'm familiar with Feistel-network ciphers but those are necessarily reversible, horrible for a cryptographic hash. Is there some sort of construction that is well-used in cryptographic hashing? Something that makes it very one-way?

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  • Best Practice For Referencing an External Module In a Java Project

    - by Greg Harman
    I have a Java project that expects external modules to be registered with it. These modules: Implement a particular interface in the main project Are packaged into a uni-jar (along with any dependencies) Contain some human-readable meta-information (like the module name). My main project needs to be able to load at runtime (e.g. using its own classloader) any of these external modules. My question is: what's the best way of registering these modules with the main project (I'd prefer to keep this vanilla Java, and not use any third-party frameworks/libraries for this isolated issue)? My current solution is to keep a single .properties file in the main project with key=name, value=classhuman-readable-name (or coordinate two .properties files in order to avoid the delimiter parsing). At runtime, the main project loads in the .properties file and uses any entries it finds to drive the classloader. This feels hokey to me. Is there a better way to this?

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  • debugging with internet explorer

    - by baiano
    I have some code that I thought I had written so that it would play nice on IE. But apparently it does not. I use IE8 for my testing and get quite frustrated with the built-in debugging 'tool'. I found that firebug has a javascript tool that debugs for IE but I have to click it for every page, wait for it to load and then test my script. Is there a way to make IE ALWAYS load the firebug .js file? I tried searching for way to set up a custom header file for my IE installation but was unsuccessful. Is there another tool out there that would be better/easier to use? Another way to test scripts for IE compatibility?

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  • Are evolutionary algorithms and neural networks used in the same problem domains?

    - by Joe Holloway
    I am trying to get a feel for the difference between the various classes of machine-learning algorithms. I understand that the implementations of evolutionary algorithms are quite different from the implementations of neural networks. However, they both seem to be geared at determining a correlation between inputs and outputs from a potentially noisy set of training/historical data. From a qualitative perspective, are there problem domains that are better targets for neural networks as opposed to evolutionary algorithms? I've skimmed some articles that suggest using them in a complementary fashion. Is there a decent example of a use case for that? Thanks

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  • Printing array with delimiters in Perl

    - by Mark B
    I have an array in Perl I want to print with space delimiters between each element, except every 10th element which should be newline delimited. There aren't any spaces in the elements if that matters. I've written a function to do it with for and a counter, but I wondered if there's a better/shorter/canonical Perl way, perhaps a special join syntax or similar. My function to illustrate: sub PrintArrayWithNewlines { my $counter = 0; my $newlineIndex = shift @_; foreach my $item (@_) { ++$counter; print "$item"; if($counter == $newlineIndex) { $counter = 0; print "\n"; } else { print " "; } } }

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  • Authlogic: Create records on other users' behalf

    - by Friðrik
    Hi Using Authlogic, what is the best way to create a record in rails on other users' behalf? Description: I have a c++ server which handles Tcp connections from many c++ clients, and I want the c++ server to create a new record in the rails database using its REST api. However, the c++ server needs to be authenticated before creating that record. What I want is to attach the original user ID (from the c++ client) to the record (but not the servers) so I know from which user the record came from. One way is for the c++ client to send its persistence token over to the c++ server which sends that token as a parameter to the create action, does that make sense? or are there maybe some better ways to do this? I have a rails app which uses authlogic for authentication. I also have another c++ client which is logs in and provides I have a c++ server which uses

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  • Python: Remove items from a list while iterating in Python

    - by xApple
    My problem is simple: I have a long list of elements that I want to iterate through and check every element against a condition. Depending on the outcome of the condition I would like to delete the current element of the list, and continue iterating over it as usual. I have read a few other threads on this matter. Two solutions seam to be proposed. Either make a dictionary out of the list (which implies making a copy of all the data that is already filling all the RAM in my case). Either walk the list in reverse (which breaks the concept of the alogrithm I want to implement). Is there any better or more elegant way than this to do it ? def walk_list(list_of_g): g_index = 0 while g_index < len(list_of_g): g_current = list_of_g[g_index] if subtle_condition(g_current): list_of_g.pop(g_index) else: g_index = g_index + 1

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  • jquery change load get url

    - by john morris
    Ok so I have a php page with data dynamically outputs depending on a $_GET variable ['file']. I have another page (index.php) which has a jQuery script that uses the load() function to load the php page. I have a list of links and when you click on one, it needs to change the $_GET variable to load, then refresh the load() jQuery variable. Heres a snippet: $("#remote-files").load("data.php?file=wat.txt"); $(".link1").mousedown(function() { $("#remote-files").load("data.php?file=link1.txt"); }); As you can see it loads the data into a div with the ID of remote-files. Is there a better way to do this, like update the page with the new get variable instead of redefining a new load function?

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  • How to do a true Java ping from Windows?

    - by stjowa
    I have a device on a network that I am attempting to ping through my Java program. Through my windows command prompt, I can ping the device address fine and do a tracert on the address fine. Online, I have seen that in order to do a ping through Java you have to do the following: InetAddress.getByName(address).isReachable(timeout); But, when I use this code on my device address, it always returns false in my program. I am using the correct IPv4 address with a good timeout value. Also, if I use a localhost address, it works fine. Why can I ping the device through cmd, but not through my program? I have heard in various places that this is not a true ping. Is there a better way to emulate a ping in Java? Thanks

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  • FIFO implementation

    - by Narek
    While implementing a FIFO I have used the following structure: struct Node { T info_; Node* link_; Node(T info, Node* link=0): info_(info), link_(link) {} }; I think this a well known trick for lots of STL containers (for example for List). Is this a good practice? What it means for compiler when you say that Node has a member with a type of it's pointer? Is this a kind of infinite loop? And finally, if this is a bad practice, how I could implement a better FIFO. EDIT: People, this is all about implemenation. I am enough familiar with STL library, and know a plenty of containers from several libraries. Just I want to discuss with people who can gave a good implementation or a good advice.

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  • How to set up source control in VS2010

    - by Jouke van der Maas
    Hi, I want to set up source control for my project, but it seems like I need a server for this. I've never done this before, and I couldn't find anything helpfull yet. Is there any way to host a server locally so Visual studio can use it? Or do you know any online (free) servers I can use? By the way, if source control is not actually what i should use for keeping track of changes in my files, please suggest a better option. Thanks in advance.

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  • What Ruby blog engines are there?

    - by Damian Nowak
    What blog engines written in Ruby do you know? Let's create a list of all Ruby blog engines as a community wiki. I kindly ask to include the following in your answers: blog engine name link to official website link to screenshots or live demo gem install gem-name (if there is one) features, for example: has plugin engine? has themes? has administration panel? anything worth mentioning Not an endorsement, just report the facts. This will make the answers very helpful to visitors. :-) Please mark your answer as a community wiki so that anyone is able to refine the description, add links, etc. It seems noone asked the question before. Found some which aren't the thing I'm really asking for. Ruby CMS/blog: Mephisto vs. Radiant (choosing which is better) Ruby Based Blogging Engine (asking just about rack-enabled blog engines) Blog Engine for Rails Application (limited to Rails)

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  • clearing cin input? cin.ignore not a good way?

    - by igor
    What's a better way to clear cin input? I thought cin.clear and cin.ignore was a good way...? code: void clearInput() { cin.clear(); cin.ignore(1000,'\n'); //cin.ignore( std::numeric_limits<streamsize>::max(), '\n' ); } My teacher gave me this reply... this is basically saying that your clearInput doesn't work FYI: ignore is NEVER a good idea as a way of getting rid of all that remains on a line and your failing this test is exactly the reason why now go clear it the correct way

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  • C++ a class with an array of structs, without knowing how large an array I need

    - by Dominic Bou-Samra
    New to C++, and for that matter OO programming. I have a class with fields like firstname, age, school etc. I need to be able to store other information like for instance, where they have travelled, and what year it was in. I cannot declare another class specifically to hold travelDestination and what year, so I think a struct might be best. This is just an example: struct travel { string travelDest; string year; }; The issue is people are likely to have travelled different amounts. I was thinking of just having an array of travel structs to hold the data. But how do I create a fixed sized array to hold them, without knowing how big I need it to be? Perhaps I am going about this the completely wrong way, so any suggestions as to a better way would be appreciated.

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  • Paypal subscribe now button

    - by Bharadwaj
    Hi, I have built an information portal in PHP [Something like a recipe book], where the first few recipes are free to access. The advanced recipes are available only to paid members. I intend to use a simple subscribe now paypal button. When the user clicks on this button, he is directed to paypal website and upon payment redirected to my site. How do I collect the payment information from paypal? I do not want to use a wsdl. I need the information to update my user level field [0 for registered users, 1 for paid users] in the users table. Any pointers? Does IPN do the trick for this? Is there a better solution for this? Thanks, Bharadwaj

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  • Trouble using genericra to integrate activemq and glassfish when using failover protocol

    - by Kyle
    Hi, I'm attempting to use activemq in glassfish using the genericra resource adapter provided with glassfish 2.1. I have found a few pages with helpful information including http://activemq.apache.org/sjsas-with-genericjmsra.html. I have actually had success and been able to get MDBs to use activemq as their JMS provider, but I'm running into an issue as I'm trying to do some more complicated configuration. I want to set up a master-slave configuration, which would require my clients to use a brokerURL of failover:(tcp://broker1:61616,tcp://broker2:61616). In order to do this, I set the following property when calling asadmin create-resource-adapter-config (I have to escape '=' and ':'): ConnectionFactoryProperties=brokerURL\=failover\:(tcp\://127.0.0.1\:61616,tcp://127.0.0.1\:61617) However, I am now getting a StringIndexOutOfBoundsException when my application starts up. I suspect the comma in between the two URLs is the culprit, since this works fine: brokerURL\=failover\:(tcp\://127.0.0.1\:61616) Just wondering if anyone has dealt with this issue before. Also wondering if there is a better way to integrate with glassfish than using the generic resource adapter.

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  • C# HttpRequest - Accessing hashtags in url

    - by CloudyOne
    Unfortunately because of the wide use of the word "hashtag" and "httprequest" i couldn't find any search results that gave me an answer on whether something like this is even possible. If i have a url like this: /Orders/Product#12345 The HttpRequest class shows me that the FilePath, RawUrl, and all other members that show the url as /Orders/Product It just gets rid of the hashtag, and i can't find a place to view it. Is there any way for me to be able to see what hashtag is on the end of the URL from the codebehind? I know i could easily make this a QueryString parameter, but i like the way this looks better, so if there's a way to do it, i'd like to find out what it is :) Thanks in advance!

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  • Efficient way to ASCII encode UTF-8

    - by Andreas Gohr
    I'm looking for a simple and efficient way to store UTF-8 strings in ASCII-7. With efficient I mean the following: all ASCII chars in the input should stay ASCII chars in the output the resulting string should be as short as possible the operation needs to be reversable without any data loss there should be no restriction on the input length the whole UTF-8 range should be allowed My first idea was to use Punycode (IDNA) as it fits the first three requirements, but it fails at the last two. Can anyone recommend an alternative encoding scheme? Even better if there's some code available to look at.

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  • Displaying UserControls based on the type a TreeView selection is bound to

    - by Ray Wenderlich
    I am making an app in WPF in a style similar to Windows Explorer, with a TreeView on the left and a pane on the right. I want the contents of the right pane to change depending on the type of the selected element in the TreeView. For example, say the top level in the Tree View contains objects of class "A", and if you expand the "A" object you'll see a list of "B" objects as children of the "A" object. If the "A" object is selected, I want the right pane to show a user control for "A", and if "B" is selected I want the right pane to show a user control for "B". I've currently got this working by: setting up the TreeView with one HierarchialDataTemplate per type adding all the UserControls to the right pane, but collapsed implementing SelectedItemChanged on the TreeView, and setting the appropriate usercontrol to visible and the others to collapsed. However, I'm sure there's a better/more elegant way to switch out the views based on the type the selection is bound to, perhaps by making more use of data binding... any ideas?

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  • Calculated property with JPA / Hibernate

    - by Francois
    My Java bean has a childCount property. This property is not mapped to a database column. Instead, it should be calculated by the database with a COUNT() function operating on the join of my Java bean and its children. It would be even better if this property could be calculated on demand / "lazily", but this is not mandatory. In the worst case scenario, I can set this bean's property with HQL or the Criteria API, but I would prefer not to. The Hibernate @Formula annotation may help, but I could barely find any documentation. Any help greatly appreciated. Thanks.

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  • What is the equivalent to IScriptControl for Web.UI.Page?

    - by Jeff Dege
    We've been using IScriptControl to tie javascript objects to our UserControls and ServerControls, and it's worked fine. The problem is that ASP.NET seems to provide no method to tie a javascript object to a Page. Up to now, we've been putting plain functions in the global namespace, but I am developing a serious allergy to that practice. It'd be easy enough to wrap our functions into a javascript class, and to include the javascript file on the page, but how to instantiate the object, how to reference it from callback events, and how to pass data to it from the code-behind, I haven't figured out. Or rather, the methods we've been using up to now (hidden fields, emitted javascript strings, etc.), really bug me. Anyone have better ideas?

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  • Querying MySQL with CodeIgniter, selecting rows where field is NULL

    - by rebellion
    I'm using CodeIgniter's Active Record class to query the MySQL database. I need to select the rows in a table where a field is not set to NULL: $this->db->where('archived !=', 'NULL'); $q = $this->db->get('projects'); That only returns this query: SELECT * FROM projects WHERE archived != 'NULL'; The archived field is a DATE field. Is there a better way to solve this? I know I can just write the query myself, but I wan't to stick with the Active Record throughout my code.

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  • How Can I Learn when to build my own Interfaces

    - by BDotA
    I am using C# and I know what are the interfaces and how syntatically use them,etc. but what I have not learned yet is that when I am tasked to write a project, create a component,... How should I learn better about interfaces so when I want to do something I be able to Think about using them in my design...or for example I want to learn about dependency injection or even using mocking objects for testing, these are all related to good understanding of interfaces and know when and how to use them ... Can you plase provide me some good advice, reading,... then can help me with that?

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