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  • Haskell: Pattern Matching with Lists

    - by user1670032
    I'm trying to make a function that takes in a list, and if one of the elements is negative, then any elements in that list that are equal to its positive counterpart should be changed to 0. Eg, if there is a -2 in a list, then all 2's in that list should be changed to 0. Any ideas why it only works for some cases and not others? I'm not understanding why this is, I've looked it over several times. changeToZero [] = [] changeToZero [x] = [x] changeToZero (x:zs:y:ws) | (x < 0) && ((-1)*(x) == y) = x : zs : 0 : changeToZero ws changeToZero (x:xs) = x : changeToZero xs *Main changeToZero [-1,1,-2,2,-3,3] [-1,1,-2,2,-3,3] *Main changeToZero [-2,1,2,3] [-2,1,0,3] *Main changeToZero [-2,1,2,3,2] [-2,1,0,3,2] *Main changeToZero [1,-2,2,2,1] [1,-2,2,0,1]

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  • Applying JQuery UI css to a textarea element

    - by Felix Guerrero
    Hi. I'm using JQuery UI for a web based development at the University. I got some forms that I put into a dialog, so I got elements like <label for="name">ID user</label><input type="text" name="iduser" size="15" id="iduser" class="text ui-widget-content ui-corner-all" maxlength=12 /> But I got some textarea elements like <label for="name">Description</label><textarea name="description" id="description" class="text ui-widget-content ui-corner-all" value=""></textarea> The issue: textarea is not taking the css as inputs does, I mean, I got corner rounder textarea as input texts but the font size and font family don't.

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  • UIWebView not evaluating javascript properly

    - by jammur
    I'm trying to run some javascript against a UIWebView but it's doesn't seem to be working. For example, here is a snippet of html I'm using to test: <html><body><h1>Hello World!</h1><p>It's me.</p></body></html> If I run the following javascript against it, the return value is 0, when it should be 1. var elements = document.getElementsByTagName("h1"); elements.length; Here's the objc code I'm using for the webview. 'parser' is a string containing the above javascript: [webView loadHTMLString:@"<html><body><h1>Hello World!</h1><p>It's me.</p></body></html>" baseURL:nil]; NSString *markupResult = [webView stringByEvaluatingJavaScriptFromString:parser];

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  • Jquery .Filter Function Question

    - by Matias
    Hi Guys, This is kindof a simple question, however, I don´t seem to figure out how to do it: I´ve got a slider filtering some stuff $("#price").slider( { range: true, step: 5, change: function(e,ui) { $('total').filter(function(index) { return ( ($("#price").slider("values", 0)) <= $(this).text() <= ($("#price").slider("values", 1))); }).parents('div.item').hide(); } }); Basically, I want an array with index of each of elements which have been filtered so I can reuse them for other purpose. I was thinking of editing filter function to something like: $('total').filter(function(index) { var matches = ( ($("#price").slider("values", 0)) <= $(this).text() <= ($("#price").slider("values", 1))); return matches; }.myFunction(matches){ //do some stuff here with matched elements } This is not correct, your help is greatly appreciated.

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  • Delete element from array

    - by Julio Diaz
    Is there a way I can get rid of some elements in an array. for instance, if i have this array int testArray[] = {0,2,0,3,0,4,5,6} Is there a "fast" way to get rid of the elements that equal 0 int resultArray[] = {2,3,4,5,6} I tried this function but I got lost using Lists public int[] getRidOfZero(int []s){ List<> result=new ArrayList<>(); for(int i=0; i<s.length; i++){ if(s[i]<0){ int temp = s[i]; result.add(temp); } } return result.toArray(new int[]); }

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  • Using beautifulsoup to extract text between line breaks (e.g. <br /> tags)

    - by Michael Altman
    I have the following HTML that is within a larger document <br /> Important Text 1 <br /> <br /> Not Important Text <br /> Important Text 2 <br /> Important Text 3 <br /> <br /> Non Important Text <br /> Important Text 4 <br /> I'm currently using BeautifulSoup to obtain other elements within the HTML, but I have not been able to find a way to get the important lines of text between <br /> tags. I can isolate and navigate to each of the <br /> elements, but can't find a way to get the text in between. Any help would be greatly appreciated. Thanks.

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  • MATLAB image corner coordinates & referncing to cell arrays

    - by James
    Hi, I am having some problems comparing the elements in different cell arrays. The context of this problem is that I am using the bwboundaries function in MATLAB to trace the outline of an image. The image is of a structural cross section and I am trying to find if there is continuity throughout the section (i.e. there is only one outline produced by the bwboundaries command). Having done this and found where the is more than one section traced (i.e. it is not continuous), I have used the cornermetric command to find the corners of each section. The code I have is: %% Define the structural section as a binary matrix (Image is an I-section with the web broken) bw(20:40,50:150) = 1; bw(160:180,50:150) = 1; bw(20:60,95:105) = 1; bw(140:180,95:105) = 1; Trace = bw; [B] = bwboundaries(Trace,'noholes'); %Traces the outer boundary of each section L = length(B); % Finds number of boundaries if L > 1 disp('Multiple boundaries') % States whether more than one boundary found end %% Obtain perimeter coordinates for k=1:length(B) %For all the boundaries perim = B{k}; %Obtains perimeter coordinates (as a 2D matrix) from the cell array end %% Find the corner positions C = cornermetric(bw); Areacorners = find(C == max(max(C))) % Finds the corner coordinates of each boundary [rowindexcorners,colindexcorners] = ind2sub(size(Newgeometry),Areacorners) % Convert corner coordinate indexes into subcripts, to give x & y coordinates (i.e. the same format as B gives) %% Put these corner coordinates into a cell array Cornerscellarray = cell(length(rowindexcorners),1); % Initialises cell array of zeros for i =1:numel(rowindexcorners) Cornerscellarray(i) = {[rowindexcorners(i) colindexcorners(i)]}; %Assigns the corner indicies into the cell array %This is done so the cell arrays can be compared end for k=1:length(B) %For all the boundaries found perim = B{k}; %Obtains coordinates for each perimeter Z = perim; % Initialise the matrix containing the perimeter corners Sectioncellmatrix = cell(length(rowindexcorners),1); for i =1:length(perim) Sectioncellmatrix(i) = {[perim(i,1) perim(i,2)]}; end for i = 1:length(perim) if Sectioncellmatrix(i) ~= Cornerscellarray Sectioncellmatrix(i) = []; %Gets rid of the elements that are not corners, but keeps them associated with the relevent section end end end This creates an error in the last for loop. Is there a way I can check whether each cell of the array (containing an x and y coordinate) is equal to any pair of coordinates in cornercellarray? I know it is possible with matrices to compare whether a certain element matches any of the elements in another matrix. I want to be able to do the same here, but for the pair of coordinates within the cell array. The reason I don't just use the cornercellarray cell array itself, is because this lists all the corner coordinates and does not associate them with a specific traced boundary.

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  • Python: Find X to Y in a list of strings.

    - by TheLizardKing
    I have a list of maybe a 100 or so elements that is actually an email with each line as an element. The list is slightly variable because lines that have a \n in them are put in a separate element so I can't simply slice using fixed values. I essentially need a variable start and stop phrase (needs to be a partial search as well because one of my start phrases might actually be Total Cost: $13.43 so I would just use Total Cost:.) Same thing with the end phrase. I also do not wish to include the start/stop phrases in the returned list. In summary: email = ['apples','bananas','cats','dogs','elephants','fish','gee'] start = 'ban' stop = 'ele' the magic here new_email = ['cats','dogs'] NOTES While not perfect formatting of the email, it is fairly consistent so there is a slim chance a start/stop phrase will occur more than once. There are also no blank elements.

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  • Android Extend BaseExpandableListAdapter

    - by Robert Mills
    I am trying to extend the BaseExpandableListAdapter, however when once I view the list and I select one of the elements to expand, the order of the list gets reversed. For example, if I have a list with 4 elements and select the 1st element, the order (from top to bottom) is now 4, 3, 2, 1 with the 4th element (now at the top) expanded. If I unexpand the 4th element the order reverts to 1, 2, 3, 4 with no expanded elements. Here is my implementation:`public class SensorExpandableAdapter extends BaseExpandableListAdapter { private static final int FILTER_POSITION = 0; private static final int FUNCTION_POSITION = 1; private static final int NUMBER_OF_CHILDREN = 2; ArrayList mParentGroups; private Context mContext; private LayoutInflater mInflater; public SensorExpandableAdapter(ArrayList<SensorType> parentGroup, Context context) { mParentGroups = parentGroup; mContext = context; mInflater = LayoutInflater.from(mContext); } @Override public Object getChild(int groupPosition, int childPosition) { // TODO Auto-generated method stub if(childPosition == FILTER_POSITION) return "filter"; else return "function"; } @Override public long getChildId(int groupPosition, int childPosition) { return childPosition; } @Override public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) { if(convertView == null) { //do something convertView = (RelativeLayout)mInflater.inflate(R.layout.sensor_row_list_item, parent, false); if(childPosition == FILTER_POSITION) { ((CheckBox)convertView.findViewById(R.id.chkTextAddFilter)).setText("Add Filter"); } else { ((CheckBox)convertView.findViewById(R.id.chkTextAddFilter)).setText("Add Function"); ((CheckBox)convertView.findViewById(R.id.chkTextAddFilter)).setEnabled(false); } } return convertView; } @Override public int getChildrenCount(int groupPosition) { // TODO Auto-generated method stub return NUMBER_OF_CHILDREN; } @Override public Object getGroup(int groupPosition) { return mParentGroups.get(groupPosition); } @Override public int getGroupCount() { // TODO Auto-generated method stub return mParentGroups.size(); } @Override public long getGroupId(int groupPosition) { // TODO Auto-generated method stub return groupPosition; } @Override public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) { if(convertView == null) { convertView = mInflater.inflate(android.R.layout.simple_expandable_list_item_1, parent, false); TextView tv = ((TextView)convertView.findViewById(android.R.id.text1)); tv.setText(mParentGroups.get(groupPosition).toString()); } return convertView; } @Override public boolean hasStableIds() { // TODO Auto-generated method stub return true; } @Override public boolean isChildSelectable(int groupPosition, int childPosition) { // TODO Auto-generated method stub return true; } } ` I just need to take a simple ArrayList of my own SensorType class. The children are the same for all classes, just two. Also, how do I go about making the parent in each group LongClickable? I have tried in my ExpandableListActivity with this getExpandableListView().setOnLongClickableListener() ... and on the parent TextView set its OnLongClickableListener but neither works. Any help on either of these is greatly appreciated!

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  • GridView styling (CSS classes) disappears

    - by ProfK
    I'm migrating a large number of stand-alone pages into content pages. Most of this involves little more than copying and pasting a GridView from one page into the new page. However, I find that styling disappears in the new project, i.e. the styles (as classes) are still present in the stylesheet, but these classes are no longer applied to GridView table elements. Example, in the old project, once a table is rendered by the GridView, its header row has a class of HeaderStyle, but in the new project this is lost, without any editing of the GridView. Is there some mysterious, built-in mechanism that automatically applies these attributes to GridView elements that I have somehow disabled?

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  • generate all subsets of size k from a set

    - by Kumar
    hi, i want to generate all the subsets of size k from a set. eg:-say i have a set of 6 elements, i have to list all the subsets in which the cardinality of elements is 3. I tried looking for solution,but those are code snippets. Its been long since I have done coding,so I find it hard to understand the code and construct a executable program around it. A complete executable program in C or C++ will be quite helpful. Hoping of an optimal solution using recursion. Thanks in advance. Kumar.

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  • Split a map using Groovy

    - by Tihom
    I want to split up a map into an array of maps. For example, if there is a map with 25 key/value pairs. I want an array of maps with no more than 10 elements in each map. How would I do this in groovy? I have a solution which I am not excited about, is there better groovy version: static def splitMap(m, count){ if (!m) return def keys = m.keySet().toList() def result = [] def num = Math.ceil(m?.size() / count) (1..num).each { def min = (it - 1) * count def max = it * count > keys.size() ? keys.size() - 1 : it * count - 1 result[it - 1] = [:] keys[min..max].each {k -> result[it - 1][k] = m[k] } } result } m is the map. Count is the max number of elements within the map.

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  • How to drag and scroll in a div with jQuery

    - by Don Munter
    Hey guys, I've been looking around for some time now, but I can't find a way to combine these elements: I want a 100% width div, with 1 row of elements. I need to scroll through this div, just like: http://jqueryfordesigners.com/demo/scrollable-timelines.html So with a hidden overflow and such. But now I want some sort of smooth ease when I let go of the mouseclick, so it'll be like a sort sweep. So when I drag the screen from left to right, and let go of the mouse, it'll move on for 1 sec and linearly slowing down. Hm, am I making sense? Does anyone know of any scripts or some tips to put me back on track? Don

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  • why won't my ajax work asynchronously

    - by payling
    I'm having trouble understanding why my code will not work asynchronously. When running asynchronously the get_price.php always receives the same $_GET value even though the alert before outputs a unique $_GET value. var arraySize = "<? echo count($_SESSION['items']); ?>"; //get items count var pos = 0; var pid; var qty; getPriceAjax(); function getPriceAjax() { pid = document.cartItemForm.elements[pos].id; //product id qty = document.cartItemForm.elements[pos].value; //quantity alert('Product: ' + pid + ' Quantity: ' + qty); $.ajax({ url:"includes/ajax_php/get_price.php", type:"GET", data:'pid='+pid+'&qty='+qty, async:true, cache:false, success:function(data){ while(pos < arraySize) { document.getElementById(pid + 'result').innerHTML=data; pos++; getPriceAjax(); } } }) }

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  • div with float next to div with width

    - by dragonfly
    Hi, I have html: <div class="field-label"><label>Email: </label></div> <div class="field"><input class="input" ......></div> and piece of css: .field-label { clear:left; float:left; padding:0.5em; width:6em; } .field { padding:0.5em; } And it worked fine. But for some elements I wanted to apply following change: when I add width to .field class layout goes to blazes: element with .field class appears under element with field-label class. Container of whole form is width enough to hold elements with field-label & field class. Why is it happening, did I miss something in css basics? Thanks ,Pawel

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  • Best way to pass a 2d array into javascript from php?

    - by 133794m3r
    Ok, what i'm trying to do here is to pass a 2d array from php to javascript in the easiest way possible. The main reason for this is because i have the array which is previously filled with data via the phpscript and doing it one by one and just "calling it as it's needed" will not work out too well since well there's more than just one row required when it's called and i'd rather not do something like for all of the elements in it as it's number is unknown until it gets said data from the database. I was going to do a while loop to write in some of the data into elements sot hat it coudl be later pulled up more easily but i cannot seem to find an easy way to do this currently. If anyone has an easy way to transfer this to javascript without having to do what i previously said.

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  • ASP.Net MVC Ajax form with jQuery validation

    - by Tomas Lycken
    I have an MVC view with a form built with the Ajax.BeginForm() helper method, and I'm trying to validate user input with the jQuery Validation plugin. I get the plugin to highlight the inputs with invalid input data, but despite the invalid input the form is posted to the server. How do I stop this, and make sure that the data is only posted when the form validates? My code The form: <fieldset> <legend>leave a message</legend> <% using (Ajax.BeginForm("Post", new AjaxOptions { UpdateTargetId = "GBPostList", InsertionMode = InsertionMode.InsertBefore, OnSuccess = "getGbPostSuccess", OnFailure = "showFaliure" })) { %> <div class="column" style="width: 230px;"> <p> <label for="Post.Header"> Rubrik</label> <%= Html.TextBox("Post.Header", null, new { @style = "width: 200px;", @class="text required" }) %></p> <p> <label for="Post.Post"> Meddelande</label> <%= Html.TextArea("Post.Post", new { @style = "width: 230px; height: 120px;" }) %></p> </div> <p> <input type="submit" value="OK!" /></p> </fieldset> The JavaScript validation: $(document).ready(function() { // for highlight var elements = $("input[type!='submit'], textarea, select"); elements.focus(function() { $(this).parents('p').addClass('highlight'); }); elements.blur(function() { $(this).parents('p').removeClass('highlight'); }); // for validation $("form").validate(); }); EDIT: As I was getting downvotes for publishing follow-up problems and their solutions in answers, here is also the working validate method... function ajaxValidate() { return $('form').validate({ rules: { "Post.Header": { required: true }, "Post.Post": { required: true, minlength: 3 } }, messages: { "Post.Header": "Please enter a header", "Post.Post": { required: "Please enter a message", minlength: "Your message must be 3 characters long" } } }).form(); }

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  • How can I write cocoa bindings as code instead of in the Interface Builder?

    - by johnjohndoe
    In my modell got an NSMutableArray that keeps track of a changing number of elements. In my view I got a NSTextField that shows the number of elements. The view gots unarchived from the nib file and alloc/inits the modell. Therefore it knowns about the modell and the contained array. I established the connection as follows. In the Interface Builder at the textfield I added a Cocoa Binding "path" like this: myModell.myArray.@count. By this I can access the count property (which is a must since the array itself does not change). The binding is based on key-value compliance which I established at the modell so the array can be accessed. But key-value compliance is not part of the questions. My question: How can I put the binding into the sourcecode and not writing it into the Interface Builder?

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  • dojo 1.4: difference in tree html rendering

    - by Fell
    Hi, I have written an application using dojo 1.3 in which i have used the dijit tree. I am loading the tree with json data specified in the store which is in turn used by the tree model. In the 1.3 version the tree elements pick up the id directly from the json data.However in 1.4 the tree elements have their own id which is something like dijit__treenode_4. The id's that I have specified in json are unique and im not able to understand why these are not being used anymore. Please help me understand how this functionality has changed and how I can override the automatic id generation.. Thanks in advance, Fell

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  • How to correctly handle click events on Widget

    - by www.liveinternet.ruusersilya_bog
    There is a task to make smt like todo list on widget (with dinamic number of elements), how to organize this list for click support on this elements. I only found how add click event on one widget layout element (with setOnClickPendingIntent), and how send text to widget element TextView. But it's unclear how handle click events for sub-elemets, or how get click coordinates(or item) where was click event. I saw widget "Agenda widget" - and it work fine with clicking on different calendar rows. I will be very much appreciated for help.

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  • Ref to map vs. map to refs vs. multiple refs

    - by mikera
    I'm working on a GUI application in Swing+Clojure that requires various mutable pieces of data (e.g. scroll position, user data, filename, selected tool options etc.). I can see at least three different ways of handling this set of data: Create a ref to a map of all the data: (def data (ref { :filename "filename.xml" :scroll [0 0] })) Create a map of refs to the individual data elements: (def datamap { :filename (ref "filename.xml") :scroll (ref [0 0]) })) Create a separate ref for each in the namespace: (def scroll (ref [0 0])) (def filename (ref "filename.xml")) Note: This data will be accessed concurrently, e.g. by background processing threads or the Swing event handling thread. However there probably isn't a need for consistent transactional updates of multiple elements. What would be your recommended approach and why?

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  • AS3 Dynamic Sprites/Movie Clips

    - by Marvy
    Im having a hard time putting in my head on how would i go at making flash read a xml file (this part I have it going smooth) and then fromt hat elements put on the stage a sprite or a movieclip that is interactive. To make it clear I want to load and display an image that when you press it it just creates another square beneath it with some text. I believe I have to interate the xml and then use each of the elements with a class and gettin that object onto the stage. Im using flash builder and as3 and im looking just for pointing in the rigth direction, of course I apreciate any more elaborate though some head clearing is just as good. Thank you.

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  • Designing template for Ruby on Rails view. What and where to learn?

    - by Victor
    Hi. I have a project going on, and I am in charge of the front-end design, whereas my developers will work on the back-end with Ruby on Rails. I do not know Ruby on Rails, and am designing front-end using XHTML, CSS, jQuery, 960.gs CSS Framework. My developer is supposed to take my design and connect the elements of back-end to it, with Ajax too. What are the things that I should know while designing the template/view so that I won't kick my developers' asses with my design? How to help the connecting of elements painless? I understand I must avoid . Some Ruby on Rails developers also prefer Blueprint CSS Framework over 960.gs. Any guidance? Thanks.

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  • Using recustion an append in prolog

    - by Adrian
    Lets say that I would like to construct a list (L2) by appending elements of another list (L) one by one. The result should be exactly the same as the input. This task is silly, but it'll help me understand how to recurse through a list and remove certain elements. I have put together the following code: create(L, L2) :- (\+ (L == []) -> L=[H|T], append([H], create(T, L2), L2);[]). calling it by create([1,2,3,4], L2) returns L2 = [1|create([2,3,4], **)\. which is not a desired result.

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  • How do I programmatically nullify a File Attachment in InfoPath Forms

    - by Doctor Zinda
    Howdy all, I'm running into a problem with some InfoPath C# code while trying to remove an attachment from a form. Basically the process is: User opens form User clicks button File attachment is cleared I've tried adding a blank attachment to my schema that never becomes populated, then setting the original field's value equal to that value by the method below. When debugging the form I catch an error: Schema validation found non-data type errors. Any tips here would be appreciated. public void BTN_ClearAttachment_Clicked(object sender, ClickedEventArgs e) { try { _OriginalAttachment.SetValue(_BLANK_ATTACHMENT.Value); } catch (Exception ex) { _ErrorField.SetValue(ex.Message + " : " + ex.StackTrace); } } Thanks, Dr Z Edit - P.S. I should clear up that both _OriginalAttachment & _ErrorField are both XPathNavigators, pointing at different schema elements. I've verified that these XPathNavigators are both pointing at valid schema elements.

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