valid html - Page 511 - Developer IT

How to execute PHP code from within javascript escape/unescape ?

- by Karthik

<Script Language='Javascript'>  </Script> I did not copy paste the whole code. There is more PHP code within the javascript. How to make the browser understand that the php code is php and not treat it as a part of a html code?

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gVim doesn't recognize the Meta (Alt) Key in an imap after changing the encoding

- by René Nyffenegger

In order to edit html files, I have the following three imaps in a file that I source for filetype html: imap <buffer> <M-[> ü imap <buffer> <M-;> ö imap <buffer> <M-'> ä This works fine until I change the encoding of the html file with set enc=utf-8. Now, pressing Alt-[ for example gives me a Û. Interestingly, after sourcing the same file again, it expands the imaps correctly. This doesn't really make sense to me. So, why is this and how can I have a more constistent environment regarding imap and utf-8. This is occuring with gVim 7.1 for Windows.

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C# 4.0: Covariance And Contravariance In Generics

- by Paulo Morgado

C# 4.0 (and .NET 4.0) introduced covariance and contravariance to generic interfaces and delegates. But what is this variance thing? According to Wikipedia, in multilinear algebra and tensor analysis, covariance and contravariance describe how the quantitative description of certain geometrical or physical entities changes when passing from one coordinate system to another.(*) But what does this have to do with C# or .NET? In type theory, a the type T is greater (>) than type S if S is a subtype (derives from) T, which means that there is a quantitative description for types in a type hierarchy. So, how does covariance and contravariance apply to C# (and .NET) generic types? In C# (and .NET), variance applies to generic type parameters and not to the resulting generic type. A generic type parameter is: covariant if the ordering of the generic types follows the ordering of the generic type parameters: Generic<T> = Generic<S> for T = S. contravariant if the ordering of the generic types is reversed from the ordering of the generic type parameters: Generic<T> = Generic<S> for T = S. invariant if neither of the above apply. If this definition is applied to arrays, we can see that arrays have always been covariant because this is valid code: object[] objectArray = new string[] { "string 1", "string 2" }; objectArray[0] = "string 3"; objectArray[1] = new object(); However, when we try to run this code, the second assignment will throw an ArrayTypeMismatchException. Although the compiler was fooled into thinking this was valid code because an object is being assigned to an element of an array of object, at run time, there is always a type check to guarantee that the runtime type of the definition of the elements of the array is greater or equal to the instance being assigned to the element. In the above example, because the runtime type of the array is array of string, the first assignment of array elements is valid because string = string and the second is invalid because string = object. This leads to the conclusion that, although arrays have always been covariant, they are not safely covariant – code that compiles is not guaranteed to run without errors. In C#, the way to define that a generic type parameter as covariant is using the out generic modifier: public interface IEnumerable<out T> { IEnumerator<T> GetEnumerator(); } public interface IEnumerator<out T> { T Current { get; } bool MoveNext(); } Notice the convenient use the pre-existing out keyword. Besides the benefit of not having to remember a new hypothetic covariant keyword, out is easier to remember because it defines that the generic type parameter can only appear in output positions — read-only properties and method return values. In a similar way, the way to define a type parameter as contravariant is using the in generic modifier: public interface IComparer<in T> { int Compare(T x, T y); } Once again, the use of the pre-existing in keyword makes it easier to remember that the generic type parameter can only be used in input positions — write-only properties and method non ref and non out parameters. Because covariance and contravariance apply only to the generic type parameters, a generic type definition can have both covariant and contravariant generic type parameters in its definition: public delegate TResult Func<in T, out TResult>(T arg); A generic type parameter that is not marked covariant (out) or contravariant (in) is invariant. All the types in the .NET Framework where variance could be applied to its generic type parameters have been modified to take advantage of this new feature. In summary, the rules for variance in C# (and .NET) are: Variance in type parameters are restricted to generic interface and generic delegate types. A generic interface or generic delegate type can have both covariant and contravariant type parameters. Variance applies only to reference types; if you specify a value type for a variant type parameter, that type parameter is invariant for the resulting constructed type. Variance does not apply to delegate combination. That is, given two delegates of types Action<Derived> and Action<Base>, you cannot combine the second delegate with the first although the result would be type safe. Variance allows the second delegate to be assigned to a variable of type Action<Derived>, but delegates can combine only if their types match exactly. If you want to learn more about variance in C# (and .NET), you can always read: Covariance and Contravariance in Generics — MSDN Library Exact rules for variance validity — Eric Lippert Events get a little overhaul in C# 4, Afterward: Effective Events — Chris Burrows Note: Because variance is a feature of .NET 4.0 and not only of C# 4.0, all this also applies to Visual Basic 10.

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ASP.NET MVC 2: How do I make the Ajax.Form to fire the Client Side Validation with Data Annotation?

- by Methee

Here is the code I have so far: <% Html.EnableClientValidation(); %> <% using (Ajax.BeginForm("Address", "Accounts", FormMethod.Post, new AjaxOptions(){}, new { id="dialog-form"} )){ %> <div> <label for="address">Address Name:</label> </div> <div> <%= Html.TextBoxFor(m => m.Name)%> <div> <%= Html.ValidationMessageFor(m => m.Name)%> </div> </div> <input type="submit" value="OK" /> <% } %> When I click submit, It does the validation on the server side, I kinda like it to validate on the Client instead of taking a trip to the server right away.

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will_paginate undefined method error - Ruby on Rails

- by bgadoci

I just installed the gem for will_paginate and it says that it was installed successfully. I followed all the instructions listed with the plugin and I am getting an 'undefined method `paginate' for' error. Can't find much in the way of Google search and haven't been able to fix it myself (obviously). Here is the code: PostsController def index @tag_counts = Tag.count(:group => :tag_name, :order => 'updated_at DESC', :limit => 10) @posts = Post.paginate :page => params[:page], :per_page => 50 respond_to do |format| format.html # index.html.erb format.xml { render :xml => @posts } format.json { render :json => @posts } format.atom end end /model/post.rb class Post < ActiveRecord::Base validates_presence_of :body, :title has_many :comments, :dependent => :destroy has_many :tags, :dependent => :destroy cattr_reader :per_page @@per_page = 10 end /posts/views/index.html.erb <%= will_paginate @posts %>

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Facebook Connect cross-domain receiver URL (XXXXXXX) must have the application's Connect URL as pref

- by pallab

I am trying to create a javascript widget which can be placed on any webpage and uses facebook connect to authenticate the user. What I have done is that,in any html file you put a javascript which has a document.write to show the widget. <script type="text/javascript" src="button.js"></script> On clicking the widget, the facecook login happens if the user is not already logged in to facebook (Single Sign On). There are no problems when I am putting the HTML file and the js file in the same directory as specified in the facebook connect URL. However, when I put the HTML file in some other folder and specify the absolute path to the js folder I get the warning "Facebook Connect cross-domain receiver URL (XXXXXXX) must have the application's Connect URL as prefix" The login however happens? How can this be resolved?

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mvc presentation model best-practices

- by Andrew Florko

Hello, everybody How do you usually convert business objects to presentation? For example: Business object Person { Id, FirstName, LastName, Patronymic ... } should be presented as "LastName F. P. " in html layout. We use Presentation classes hierarchy to represent data ready for output from Business model. Questions: Will you keep presentation model completely separated from Business Model. For example, can strong-typed views (MVC ASP.NET) aggregate formatted business data as well as raw business objects (that leads toward <%=Html.Encode(PersonHelper.ToShort(Model.Person))% html layout injections) What architecture layer do you choose for conversion (mvc controllers that formats business data from business layer, for instance). Thank you in advance

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Cufon JS is not loading

- by UXdesigner

I've developed a website in html/css and it works perfectly fine. Now I'm working with the coder, integrating this to a .NET framework, changing the website to .apsx instead of html, but during the build of the website, the only error that is marked is the load of Cufon , it simply can't load and the structure and syntax of all the commands are the same I used with the html site that actually works. There are no path problems so far. What do you guys think would be this problem ? Thank you for your kind help.

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Library to parse ERB files

- by Douglas Sellers

I am attempting to parse, not evaluate, rails ERB files in a Hpricot/Nokogiri type manner. The files I am attempting to parse contain HTML fragments intermixed with dynamic content generated using ERB (standard rails view files) I am looking for a library that will not only parse the surrounding content, much the way that Hpricot or Nokogiri will but will also treat the ERB symbols, <%, <%= etc, as though they were html/xml tags. Ideally I would get back a DOM like structure where the <%, <%= etc symbols would be included as their own node types. I know that it is possible to hack something together using regular expressions but I was looking for something a bit more reliable as I am developing a tool that I need to run on a very large view code base where both the html content and the erb content are important. For example, content such as: blah blah blah <divMy Great Text <%= my_dynamic_expression %</div Would return a tree structure like: root - text_node (blah blah blah) - element (div) - text_node (My Great Text ) - erb_node (<%=)

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CSS Margins Increase with H1 Length

- by Ethan Turkeltaub

Consider the following markup: <!DOCTYPE html> <html> <head> <title>Test Page</title> <link href="screen.css" rel="stylesheet" /> </head> <body> <h1>Test</h1> <h3>Description</h3> </body> </html> And the CSS: h3{ margin-top: -25px; } Now, I want the H3 to have a margin-left of however long H1 is, and it is consistently 20px away. So, if I have a H1 block of 200px long, then H3 would have a margin-left of 220px, and so on and so forth. How would I do this?

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Avoid XmlDocument validating namespaces in C#

- by Abbey Kingston

Hello, I'm trying to find a way of indenting a HTML file, I've been using XMLDocument and just using a XmlTextWriter. However I am unable to format it correctly for HTML documents because it checks the doctype and tries to download it. Is there a "dumb" indenting mechanism that doesnt validate or check the document and does a best effort indentation? The files are 4-10Mb in size and they are autogenerated, we have to handle it internal - its fine, the user can wait, I just want to avoid forking to a new process etc. Essentially, right now I use a MemoryStream, XmlTextWriter and XmlDocument, once indented I read it back from the MemoryStream and return it as a string. Failures happen for XHTML documents and some HTML 4 documents because its trying to grab the dtds. I tried setting XmlResolver as null but to no avail :(

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Authorizing sections of a view in MVC

- by Duk

I was wondering if it's possible to authorize parts of a view inside the view. For example, I understand how to authorize the entire controller in this method <HandleError()> _ Public Class HomeController Inherits System.Web.Mvc.Controller Function Index() Return View() End Function <Authorize(Roles:="Administrators")> _ Function AdministratorSecrets() Return View() End Function End Class But what Id like to do is have it so if the admin is logged in, they can see additional links in my navigation. Something along the lines of <ul id="menu"> <li><%= Html.ActionLink("Home", "Index", "Home")%></li> <li><%= Html.ActionLink("About", "About", "Home")%></li> <Authorize(Roles:="Administrators")> _ <li><%= Html.ActionLink("Admin", "Admin", "Home")%></li> </ul> Obviously that won't work, but it gives an idea of what I'm trying to accomplish. Any ideas?

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Can you clear jquery ajax cache?

- by chobo2

Hi I am wondering is it possible to clear the cache from a particular ajax method? Say if I have this $.ajax({ url: "test.html", cache: true, success: function(html){ $("#results").append(html); } }); Now 99% of the time a cached result can be used since it should always be same content. However if a user updates this content it of course changes. If it is cached and it would still show the old content. So it would be cool if I could pick out this cache for this method and clear it and all other cached stuff would stay. Can this be done?

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Security Level for WebBrowser control

- by jaywon

I am trying to migrate an .hta application to a C# executable. Of course, since it's an .hta the code is all HTML and Jscript, with calls to local ActiveX objects. I created a C# executable project and am just using the WebBrowser control to display the HTML content. Simply renamed the .hta to an .html and took out the HTA declarations. Everything works great, except that when I make calls to the ActiveX objects, I get a security popup warning of running an ActiveX control on the page. I understand why this is happening since the WebBrowser control is essentially IE and uses the Internet Options security settings, but is there any way to get the WebBrowser control to bypass security popups, or a way to register the executable or DLLs as being trusted without having to change settings in Internet Options? Even a way to do on a deployment package would work as well.

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Adobe Flash player Secuirty Pop-Up question

- by kapildalwani

I am building a Audio Recording tool using Flash and Wowza. I dont want to start the recording until the use clicks the Allow Button is the Security Pop-up question represented here http://www.macromedia.com/support/documentation/en/flashplayer/help/help05.html In Audio I dont get this until I attach the stream to it. In Video can get thsi question when I attach the camera to Video. I want to avoid making a connection until the user clicks Accept and this doesn't happen until I make the connection request in Audio. I am able to display the http://www.macromedia.com/support/documentation/en/flashplayer/help/help09.html pop-up using SecurityManager Is there a way I can call the pop-up from my code. http://www.macromedia.com/support/documentation/en/flashplayer/help/help05.html

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How to escape HAML for Javascript in Sinatra

- by viatropos

I would like to return a list/combobox from an ajax request ("Which on of these do you like?" type thing). I would like to write that little snippet in HAML, which converts it to HTML, but when I do, the page goes blank. I'm assuming this is because the HTML isn't escaped. Is there a way to escape HAML so I can do $("#mydiv").html(response);? Here's the method: post "/something" do # process... haml :"partials/_select", :layout => false, :locals => {:collection => choices} end ... the haml template: %select - collection.each do |item| %option{:value => item.to_s}= item.to_s ... and the javascript: success: function(responseText, statusText, xhr, $form) { $(".dialog_content").append(responseText); } I have tried the sinatra_more plugin and the escape_javascript method, but there's problems with the haml buffer in sinatra. Any ideas?

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Emberjs bindAttr inside of #each

- by Andrej Kaurin

Code for view is Ember.View.extend({ template: Ember.Handlebars.compile(html), // html is in string content: function() { return [ { Title: "Dashboard", ID: "dashboard" }, { Title: "Invoices", ID: "invoices" }, { Title: "Expenses", ID: "expenses" }, { Title: "People", ID: "people" }, { Title: "Reports", ID: "reports" }, { Title: "Settings", ID: "settings" } ]}, iconClass: "icon icon-dashboard" }); Template (show above as "html") looks like this: <ul> {{#each link in content}} <li> <a> <span class="icon" {{bindAttr class="iconClass"}}></span> <span class="title">{{link.Title}}</span> </a> </li> {{/each}} </ul> Am I doing something wrong with scope or?

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jQuery ajax() function is ignoring dataType parameter in Firefox

- by ccleve

I'm trying to use jQuery.ajax() to fetch some html, but Firefox is giving me a "junk after document element" error message. As explained here and here the problem seems to be that Firefox is expecting XML from the server, and when it doesn't parse correctly it throws the error. Here's my ajax code: jQuery.ajax({ url: name, dataType: "html", success: function(result) { console.log(result); }, error: function (jqXHR, textStatus, errorThrown) { console.log(errorThrown); } }); The server returns the html with these response headers: Accept-Ranges bytes Content-Length 2957 Last-Modified Tue, 02 Jul 2013 16:16:59 GMT Note that there's no content-type header. I'm sure that adding one would solve the problem, but that's not an option. The real problem is that Firefox appears to be ignoring the dataType: parameter in the ajax call. I've also tried adding contentType: and accepts: parameters, but it doesn't help. What am I missing here? How do I force Firefox to process the response as plain text?

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jQuery .Ajax() function selector , store specific data in variable

- by user279321

I am new to jQuery and I have the following problem. My project has say 2 pages, 1.JSP and 2.html. Now I want to pick selected data from 2.html and use it on 1.JSP. Now this was achieved very easily using .load but I want the data to be present in a JavaScript variable rather than put it on the page (div tags, etc.), so that I can work upon that data (modify or add to database). I tried using .ajax and was able to write the following code: var value = (function () { var val = nulll; var filename = " 2.html"; $.ajax ({ 'async': false, 'global': false, 'url': filename, 'success' : function(data) { val = data; } }) return val; })() document.write(value) Where do I put the selector format (say div.id5) so that my variable have only relevant data rather than the full file data?

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Java JEditorPane Format

- by ikurtz

im trying to implement a Chat feature in my application. i have used 2 JEditorPane. one for holding chat history and the other for sending chat to the previous JEditorPane. the JEditorPane is text/html type. the problem i am having is when i put more than one space between characters it is automatically removed by the parser because it is HTML! how can i make it so, that the spaces are not stripped? example: hello world becomes: hello world. also i am having to parse the html tags so the new messages can be added to the history window. is there a better option than using JEditorPane? if i used JTextPane would it be easier to implement? i would like the chat boxes/panes to be able to handle bold, URL embedding for now. thank you and look forward to your guidance.

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jQuery fadeOut, replaceWith, animate almost working

- by Jesse

I am trying to accomplish the following: 1. On click, have a div with id="fader" fadeout 2. replaceHtml of fader with new html (this new HTML will appear below the fold of the browser) 3. Animate new HTML to slide up to the specified location Step 1 and 2 are working, step 3 is not and I'm stumped as to why. Here's the javascript: $("#fader").fadeOut(1000, function() { $(this).replaceWith('<div id=\"fader\" style=\"margin-top:-500px;width:500px;height:400px;border:1px solid black;\">new div</div>', function() { $("#fader").animate({marginTop: "500px"}); }); }); Any thoughts on why the div won't animate would be greatly appreciated, thanks in advance!

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wmd editor sanitizing

- by Ke

hi, i am trying to find ways to sanitize the input of wmd editor Specifically, I am trying to make HTML tags only available in the <code>tags that wmd generates. Is that possible My problem is that the following code is rendered as html which is vunerable to potential xss attacks e.g. <a onmouseover="alert(1)" href="#">read this!</a> The above code renders normally both in preview mode and when saved to the db. I notice that SO doesnt seem to have this problem. The same code is just rendered as text. I notice that SO has shared their code here http://refactormycode.com/codes/333-sanitize-html Do I really have to use c# in order to sanitize wmd to do this? Any help appreciated , cheers Ke

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recursive html2haml

- by yaya3

I have many html files in nested directories which I need to convert to Haml templates I've modified the following bash script from here - http://terrbear.org/?p=277 to modify html files and not erb but I still need to modify it to be recursive ... #!/bin/bash if [ -z "$1" ]; then wdir="." else wdir=$1 fi for f in $( ls $wdir/*.html ); do out="${f%}.haml" if [ -e $out ]; then echo "skipping $out; already exists" else echo "hamlifying $f" html2haml $f > $out fi done I've named this script h2h.sh and tried going for commands like h2h.sh `find . -type d` I'm getting no output in the terminal Thanks

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Displaying most popular posts on my blog - Ruby on Rails

- by bgadoci

I have created a simple blog application using Ruby on Rails, both of which I am new to. I am trying to get my most 'voted' posts to display in my /views/posts/index.html.erb view. Here are the basics. I have created a votes table and successfully allow a user to 'vote' for a post on the /views/posts/show.html.erb page. When they vote, it passes '1' to the votes table and I return the vote count via ajax to the same show page. Vote belongs_to :post and Post has_many :votes. I would like to display in /views/posts/index.html.erb the post title and the amount of times it has been voted for, ordered by posts with the highest vote count. Any ideas on how to do this?

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Techniques for modeling a dynamic dataflow with Java concurrency API

- by Maian

Is there an elegant way to model a dynamic dataflow in Java? By dataflow, I mean there are various types of tasks, and these tasks can be "connected" arbitrarily, such that when a task finishes, successor tasks are executed in parallel using the finished tasks output as input, or when multiple tasks finish, their output is aggregated in a successor task (see flow-based programming). By dynamic, I mean that the type and number of successors tasks when a task finishes depends on the output of that finished task, so for example, task A may spawn task B if it has a certain output, but may spawn task C if has a different output. Another way of putting it is that each task (or set of tasks) is responsible for determining what the next tasks are. Sample dataflow for rendering a webpage: I have as task types: file downloader, HTML/CSS renderer, HTML parser/DOM builder, image renderer, JavaScript parser, JavaScript interpreter. File downloader task for HTML file HTML parser/DOM builder task File downloader task for each embedded file/link If image, image renderer If external JavaScript, JavaScript parser JavaScript interpreter Otherwise, just store in some var/field in HTML parser task JavaScript parser for each embedded script JavaScript interpreter Wait for above tasks to finish, then HTML/CSS renderer (obviously not optimal or perfectly correct, but this is simple) I'm not saying the solution needs to be some comprehensive framework (in fact, the closer to the JDK API, the better), and I absolutely don't want something as heavyweight is say Spring Web Flow or some declarative markup or other DSL. To be more specific, I'm trying to think of a good way to model this in Java with Callables, Executors, ExecutorCompletionServices, and perhaps various synchronizer classes (like Semaphore or CountDownLatch). There are a couple use cases and requirements: Don't make any assumptions on what executor(s) the tasks will run on. In fact, to simplify, just assume there's only one executor. It can be a fixed thread pool executor, so a naive implementation can result in deadlocks (e.g. imagine a task that submits another task and then blocks until that subtask is finished, and now imagine several of these tasks using up all the threads). To simplify, assume that the data is not streamed between tasks (task output-succeeding task input) - the finishing task and succeeding task won't exist together, so the input data to the succeeding task will not be changed by the preceeding task (since it's already done). There are only a couple operations that the dataflow "engine" should be able to handle: A mechanism where a task can queue more tasks A mechanism whereby a successor task is not queued until all the required input tasks are finished A mechanism whereby the main thread (or other threads not managed by the executor) blocks until the flow is finished A mechanism whereby the main thread (or other threads not managed by the executor) blocks until certain tasks have finished Since the dataflow is dynamic (depends on input/state of the task), the activation of these mechanisms should occur within the task code, e.g. the code in a Callable is itself responsible for queueing more Callables. The dataflow "internals" should not be exposed to the tasks (Callables) themselves - only the operations listed above should be available to the task. Note that the type of the data is not necessarily the same for all tasks, e.g. a file download task may accept a File as input but will output a String. If a task throws an uncaught exception (indicating some fatal error requiring all dataflow processing to stop), it must propagate up to the thread that initiated the dataflow as quickly as possible and cancel all tasks (or something fancier like a fatal error handler). Tasks should be launched as soon as possible. This along with the previous requirement should preclude simple Future polling + Thread.sleep(). As a bonus, I would like to dataflow engine itself to perform some action (like logging) every time task is finished or when no has finished in X time since last task has finished. Something like: ExecutorCompletionService<T> ecs; while (hasTasks()) { Future<T> future = ecs.poll(1 minute); some_action_like_logging(); if (future != null) { future.get() ... } ... } Are there straightforward ways to do all this with Java concurrency API? Or if it's going to complex no matter what with what's available in the JDK, is there a lightweight library that satisfies the requirements? I already have a partial solution that fits my particular use case (it cheats in a way, since I'm using two executors, and just so you know, it's not related at all to the web browser example I gave above), but I'd like to see a more general purpose and elegant solution.

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