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  • HTML: Display:none does this allow multiple ID-Attributes with same name (when "hidden")?

    - by Jan
    Hello, according to the HTML Standards ID-Attributes of any HTML Tag in a webpage have to be unique in the document!? Does this rule also apply to HTML Tags that have been "disabled/hidden" by using: display:none? Example: <html> <body> <div id="one"></div> <div id="one" style="display:none;"></div> </body> </hmtl> Is this valid HTML or not. So the question is do "display:none"= hidden Elements also "count/matter" in regard to the rule only having unique ID-Attributes in a single webpage? Thanks Jan

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  • Singletons and other design issues

    - by Ahmed Saleh
    I have worked using different languages like C++/Java and currently AS3. Most applications were computer vision, and small 2D computer games. Most companies that I have worked for, they use Singletons in a language like AS3, to retrieve elements or classes in an easy way. Their problem is basically they needs some variables or to call other functions from other classes. In a language like AS3, there is no private constructor, and they write a hacky code to prevent new instances. In Java and C++ I also faced the situation that I need to use other classe's members or to call their functions in different classes. The question is, is there a better or another design, to let other classes interact with each others without using singletons? I feel that composition is the answer, but I need more detailed solutions or design suggestions.

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  • jquery event get array of objects

    - by Anton
    I have few nested DIV elements. For example: <div id='id1'><div id='id2'>content</div></div> I attach event to DIVs event handler using jQuery: $('div').click(function () { //some code }); There will be two events when user click on content. So there will be two simultaneous events. Is it possible to get inside event handler array of objects (DIVs) what have click event? May be it is possible using other framework but jQuery?

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  • How can I bind dynamic data to DataGridTemplateColumn in code?

    - by TuomoT
    I'm using DataGrid from CodePlex. I have objects (ICustomTypeDescriptor) that have properties 'name' 'description' 'c' 'd' and so on (the names are dynamic, and so is the value) and they have information behind them. I have templates for different types. And if I have to list the properties of a single element I can just bind to the values in xaml and use datatemplateselector (in datagridtemplatecolumn) which will pick the correct template. However, when I'm listing several of the elements, how can I use the selectors and the templates? How do I get the correct property bound to the template (two-way)? When ignoring the need for different templates, using DataGridTextColumn with bindings is very simple (and works, see example below), is there any way to use similar approach with the DataGridTemplateColumn? foreach (String propertyName in listOfPropertyNames) { DataGridTextColumn textColumn = new DataGridTextColumn() { Header = propertyName, Binding = new Binding() { Path = new PropertyPath(propertyName) } }; DataGrid.Columns.Add(textColumn); }

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  • overflow-x AND Middle Mouse Button Moving

    - by Rad The Mad
    My Page is 980px in Width, but I have a few design elements (which belong with the background). I positioned them with position: absolute;. This creates a horizontal scrollbar for those who have a =< 1024 resolution. I disabled that scrollbar with overflow-x:hidden on (and for IE7 and etc). However, when I hold my middle mouse button,(i think this applies to laptop touchpads as well) it let's me move around to the right, is it possible to fix this with anything? (javascript, css)? Tested this issues in Chrome, IE, Firefox.

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  • Programmatically create static arrays at compile time in C++

    - by Hippicoder
    One can define a static array at compile time as follows: const std::size_t size = 5; unsigned int list[size] = { 1, 2, 3, 4, 5 }; Question 1 - Is it possible by using various kinds of metaprogramming techniques to assign these values "programmatically" at compile time? Question 2 - Assuming all the values in the array are to be the same barr a few, is it possible to selectively assign values at compile time in a programmatic manner? eg: const std::size_t size = 7; unsigned int list[size] = { 0, 0, 2, 3, 0, 0, 0 }; Solutions using C++0x are welcome The array may be quite large, few hundred elements long The array for now will only consist of POD types It can also be assumed the size of the array will be known beforehand, in a static compile-time compliant manner. Solutions must be in C++ (no script or codegen based solutions)

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  • Data Structure for a particular problem??

    - by AGeek
    Hi, Which data structure can perform insertion, deletion and searching operation in O(1) time in the worst case. We may assume the set of elements are integers drawn from a finite set 1,2,...,n, and initialization can take O(n) time. I can only think of implementing a hash table. Implementing it with Trees will not give O(1) time complexity for any of the operation. Or is it possible?? Kindly share your views on this, or any other data structure apart from these.. Thanks..

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  • alternative to check, whether a value is in a set

    - by stanleyxu2005
    Hi All, I have the following code. It looks ugly, if the value equals to one of the following value then do something. var Value: Word; begin Value := 30000; if (Value = 30000) or (Value = 40000) or (Value = 1) then do_something; end; I want to refactor the code as follows: var Value: Word; begin Value := 30000; if (Value in [1, 30000, 40000]) then // Does not work do_something; end; However, the refactored code does not work. I assume that a valid set in Delphi accepts only elements with type byte. If there any good alternative to refactor my original code (besides using case)?

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  • How to make a NON-LINE based diff between two strings in Java

    - by Mycol
    I have to compare the text content of two xml elements, eg. <p>During lunch he hears strangers whispering, catching the name "Potter" and "Harry", and someone saying You-Know-Who has gone at last. </p> and <p>During dinner he hears strangers whispering, catching the name "Rossi" and "Mario", and someone saying You-Know-Who has gone at first. </p> What I'm looking for is some java libraries to make a diff between the content of paragraphs. All the tools I found makes a line diff. But they're not what I want, simply because i have no lines, but "strings" to compare. What I need is to have a char-based diff: eg. a diff that tells me something like " from the first file, remove char from 8 to 12, add the string "dinner" from char 8."

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  • C++ infix to postfix conversion for logical conditions

    - by Gopalakrishnan Subramani
    I want to evaluate one expression in C++. To evaluate it, I want the expression to be converted to prefix format. Here is an example wstring expression = "Feature1 And Feature2"; Here are possible ways. expression = "Feature1 And (Feature2 Or Feature3)"; expression = "Not Feature1 Or Feature3"; Here And, Or, Not are reserved words and parentheses ("(", )) are used for scope Not has higher precedence And is set next precedence to Not Or is set to next precedence to And WHITE SPACE used for delimiter. Expression has no other elements like TAB, NEWLINE I don't need arithmetic expressions. I can do the evaluation but can somebody help me to convert the strings to prefix notation?

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  • A galaxy with stars, milkyway and other stuffs (WPF)

    - by boj
    What is a "realistic" way to build a galaxy in 2D with wpf? I'm not interessed in the physical modelling but the graphical aspect. At least the stars (position, size, color, pulsing etc.) should be generated from code. Generating milkyways would be nice. Main questions are: Stars: lens flare? texturing? Milkyway: bump mapping? "Far" stars: textures? generated? Pulsing? other elements, any effects are welcome! Some examples (taken from the web, I want to build similar pictures (animations) with wpf): Thank you.

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  • Get element using id problem

    - by Ebe
    I am modifying existing legacy webpages(which i shouldn't modify existing parts but adding) and the webpage uses document.write to write certain html elements. when i use <script type="text/javascript" language="javascript"> var v = document.getElementById('td_date_cal_0'); alert(v); </script> v becomes null and when i create button and click <input type="button" id="mnbutton" onclick="mnLoader();" value="Click Me!" />; <script type="text/javascript" language="javascript" > function mnLoader() { var v = document.getElementById("td_date_cal_0"); alert(v); } <br /> </script> Any idea, how to get the element without need of user action, such as clicking? Thanks, Ebe

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  • Why doesn't this list comprehension do what I expect it to do?

    - by Az
    The original list project_keys = sorted(projects.keys()) is [101, 102, 103, 104, 105, 106, 107, 108, 109, 110] where the following projects were deemed invalid this year: 108, 109, 110. Thus: for project in projects.itervalues(): # The projects dictionary is mapped to the Project class if project.invalid: # Where invalid is a Bool parameter in the Project class project_keys.remove(project.proj_id) print project_keys This will return a list of integers (which are project id's) as such: [101, 102, 103, 104, 105, 106, 107] Sweet. Now, I wanted it try the same thing using a list comprehension. project_keys = [project_keys.remove(project.proj_id) for project in projects.itervalues() if project.invalid print project_keys This returns: [None, None, None] So I'm populating a list with the same number as the removed elements but they're Nones? Can someone point out what I'm doing wrong? Additionally, why would I use a list comprehension over the for-if block at the top? Conciseness? Looks nicer?

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  • How can I merge two lists and sort them working in 'linear' time?

    - by Sergio Tapia
    I have this, and it works: # E. Given two lists sorted in increasing order, create and return a merged # list of all the elements in sorted order. You may modify the passed in lists. # Ideally, the solution should work in "linear" time, making a single # pass of both lists. def linear_merge(list1, list2): finalList = [] for item in list1: finalList.append(item) for item in list2: finalList.append(item) finalList.sort() return finalList # +++your code here+++ return But, I'd really like to learn this stuff well. :) What does 'linear' time mean?

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  • Multiple classes in body tag, multi-dimensional css structure or blueprint for insanity?

    - by mwiik
    This question is about an approach to css structuring, and so is more discussion oriented. I'm working with some outsourced css where the body tags have multiple classes assigned, up to half a dozen. (To make things a little worse, none of the css selectors include an html tag which is making it confusing to analyze the css.) These body classes are then used to modify classed or id'd widgets within. It seems like this approach is like adding an additional dimension to the css, perhaps in some attempt to create a structured css approach. Documentation might have helped, had we been provided any. This differs from my approach where widgets are styled primarily via id'd divs, perhaps extracting the more generic elements into a class, i.e. div#MyWidget.widgets. Any ideas on whether such an approach is maintainable, especially considering I am dealing with websites with thousands of pages including tons of legacy stuff, all done by different people with different skill levels? Thanks...

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  • nested columns in compass/sass

    - by corroded
    I've been studying compass and while it is a fun thing to play with and use, one thing bothers me(besides being unable to add padding as it wrecks the grid), how do I nest columns? I want to be able to do what blueprint does: nest containers like say, I have a 24-column page divided in two(17 and 7 columns). In the right part of that page(the one with 7 columns), I want to divided some elements into two(2 and 5 columns). I tried this: #main +container #main-content +column(17) +box-padding(17, 10px) :margin :right 0 #sidebar +column(7, true) +box-padding(7, 10px) That's the code for the main page. The sidebar contains a list with some labels and input fields li +container :margin :bottom 5px label +column(2) :margin :right 0 input +column(5, true) It kinda works, but inspecting the li in firebug shows that it's width is actually 950px as opposed to be just 270px since it is just 7 columns. I tried googling about nested columns but I can't seem to find any example in compass. I've also tried the wiki and the documentation to no avail.

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  • How to add values to a JSON object?

    - by Damiano
    Hello everybody, I have created an array with: var msg = new Array(); then, I have a function that add values to this array, this function is: function add(time, user, text){ var message = [time, user, text]; if (msg.length >= 50) msg.shift(); msg.push(message); } As you can see, if the array has 50 or more elements I remove the first with .shift(). Then I add an array as element. Ok, the code works perfectly, but now I have to loop the msg array to create a JSON obj. The JSON object should has this format: var obj = [ {'time' : time, 'user' : user, 'text' : text}, {'time' : time, 'user' : user, 'text' : text}, {'time' : time, 'user' : user, 'text' : text} ] I mean...i have to loop msg array and then store all the values inside the JSON object. I do not know how to "concatenate" the element of the array inside json obj. Could you help me? Thank you very much in advance!

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  • Haskell map function with predicate

    - by Paul
    I feel like this should be fairly obvious, or easy, but I just can't get it. What I want to do is apply a function to a list (using map) but only if a condition is held. Imagine you only wanted to divide the numbers which were even: map (`div` 2) (even) [1,2,3,4] And that would give out [1,1,3,2] since only the even numbers would have the function applied to them. Obviously this doesn't work, but is there a way to make this work without having to write a seperate function that you can give to map? Filter is almost there, except I also want to keep the elements which the condition doesn't hold for, and just not apply the function to them. Thanks

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  • Testing for the existence of a field in a class

    - by Brett
    Hi, i have a quick question. I have a 2D array that stores an instance of a class. The elements of the array are assigned a particular class based on a text file that is read earlier in the program. Since i do not know without looking in the file what class is stored at a particular element i could refer to a field that doesn't exist at that index (referring to appearance when an instance of temp is stored in that index). i have come up with a method of testing this, but it is long winded and requires a second matrix. Is there a function to test for the existence of a field in a class? class temp(): name = "default" class temp1(): appearance = "@"

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  • Why is the Twitter Bootstrap "fixed" layout NOT fixed?

    - by leonel
    The Twitter Bootstrap site reads as follows: The default and simple 940px-wide, centered layout for just about any website or page provided by a single <div class="container">. Quote from http://twitter.github.com/bootstrap/scaffolding.html#layouts That's exactly what I have in my HTML but when I inspect the element, I see this CSS apply to it: .container, .navbar-fixed-top .container, .navbar-fixed-bottom .container { width: 1170px; } By the way, if I override that CSS rule by adding... div.container{ width:940px; } Then the elements inside the div.container are wider than the div.container itself and look out of place. So, why is the Twitter Bootstrap "fixed" layout NOT fixed? and how can I make it fixed?

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  • Fast dot product for a very special case

    - by psihodelia
    Given a vector X of size L, where every scalar element of X is from a binary set {0,1}, it is to find a dot product z=dot(X,Y) if vector Y of size L consists of the integer-valued elements. I suggest, there must exist a very fast way to do it. Let's say we have L=4; X[L]={1, 0, 0, 1}; Y[L]={-4, 2, 1, 0} and we have to find z=X[0]*Y[0] + X[1]*Y[1] + X[2]*Y[2] + X[3]*Y[3] (which in this case will give us -4). It is obvious that X can be represented using binary digits, e.g. an integer type int32 for L=32. Then, all what we have to do is to find a dot product of this integer with an array of 32 integers. Do you have any idea or suggestions how to do it very fast?

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  • External resources in Flash

    - by Eric
    Hey all. I'm working on an application that was originally intended for HTML, but I've recently concluded that the best thing to do for my purposes is to do it in Flash instead. One of the big things I need is to be able to bring in movieclips from external files and add them to my main movie at runtime (dynamic number of elements, skinning, etc.) Don't need full-on code for this, but I could use some assistance in tracking down the resources to learn how to do these things successfully. Tutorials, best practices… The usual suspects. I've been using Flash for a while now, and used to do this pretty easily in AS2, but I've had some hiccups using classes and addchild in an earlier attempt, so any help would be much appreciated. Thanks!

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  • Using javascript with DITA

    - by team-ferrari22
    Hi All, How to use javascript with DITA ? •We can give 'javascript:URL' to the 'href' attribute of , and elements and it will execute it properly. ? ¦ e.g.Click here to get alert box •We tried to execute javascript user defined functions from href attribute but build fails. •We added .js files to .dita file resources and tried to refer a function from that file by href attribute.It is also not working. Before converting the DITA files into html using DITA toolkit,if we want to add JAVASCRIPT functionality which can be later used in html files, how it can be done? Please guide us. Regards.

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  • Best Dijkstra papers to explain this quote?

    - by jemfinch
    I was enjoying "The Humble Programmer" earlier today and ran across this choice quote: Therefore, for the time being and perhaps forever, the rules of the second kind present themselves as elements of discipline required from the programmer. Some of the rules I have in mind are so clear that they can be taught and that there never needs to be an argument as to whether a given program violates them or not. Examples are the requirements that no loop should be written down without providing a proof for termination nor without stating the relation whose invariance will not be destroyed by the execution of the repeatable statement. I'm looking for which of Dijkstra's 1300+ writings best describe in further detail rules such as he was describing above.

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  • Iterate set covered by cross-product of ranges in ruby

    - by wilsona
    I figured this answer had been asked before, so I searched, but I couldn't find anything. Granted, there are a ton of Ruby Array questions, so it might be there, just buried. In any case, I'm trying to reduce a cross-product of ranges, returning a sum of all elements of the cross-product that meet some set of conditions. To construct a trivial example, if I have an array like this: [0..1,0..1,0..1] I'd like to iterate over this set: [ [0,0,0], [0,0,1], [0,1,0], [0,1,1], [1,0,0], [1,0,1], [1,1,0], [1,1,1] ] and return a sum based the condition "return 1 if i[0] == 1 and i[2] == 0" (which would give 2). In my contrived example, I could do it like this: br = 0..1 br.reduce(0){|sumx, x| sumx + br.reduce(0){|sumy, y| sumy + br.reduce(0){|sumz, z| sumz + (x == 1 and z == 0 ? 1 : 0) } } } , but in the actual application, the set of ranges might be much larger, and nesting reduces that way would get quite ugly. Is there a better way?

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