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check if foler exists in the root jquery

- by Dimal Chandrasiri

I'm trying to load an image to a div background using the following file structure in the root. WebContent -- | zharaimages -- | [ItemID] -- | Image.jpg This is done by jQuery and the file structure is inside the root. The ItemID folder is dynamic and I have to check whether the path exists using jQuery and if the path is not valid, I should go to a default path to fetch the default image. How can I check the path is valid using jQuery. I'm hoping to this can be done without an ajax call. Can any one help me on a tutorial or an API I can use for this! UPDATE The files are on the server. The concept I have is that I have 100s of item elements & I want to load an image for each item element. The images are saved in the server ( a local host ) and the folder hierarchy is divided using the item ID as shown. What I want to do is check whether the image file exists before appending it to the background of the item element div. Is this possible. This is a web application developed using spring.

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Get height of DIV and it's content with JQuery

- by user1012403

I have a div which contains several elements: <div class="menuItem designMenu" id="dMenu"> <ul class="menuList menu"> <li class="menuHeader">Design</li> <li class="projectHeader">Mother</li> <li class="projectBody">Some text here</li> <li class="more">More</li> </ul> </div> I need to get the height of the dMenu items that I can animate it upwards, including all the content inside. My Javascript currently: var designHeight = $("#dMenu").height(); Returns nothing. I've tried offsetHeight, scrollHeight, and everything else Google turns up. I'm running the JQuery at the end of the body, inside a document ready function. The reason to get the height to animate, instead of doing it manually, is that a: I'd like to learn how and b: I don't yet know how many items will be int he div. Thanks.

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listbox select count not work dont work

- by sadpcd

I recently trying to make a form with multiple select box. When someone select the options the number of selected options will be display on another text. I'm a beginner in JavaScript. The function is called, but it doesn't count the number of the selected options. <select name="element_17_1[ ]" size="7" multiple="multiple" class="element select medium" id="element_17_1[ ]" onfocus="selectCount(this.form);" onClick="selectCount(this.form);" > <option value="Opt1">Opt1</option> <option value="Opt2">Opt2</option> <option value="Opt3">Opt3</option> <option value="Opt4">Opt4</option> <option value="Opt5">Opt5</option> <option value="Opt6">Opt6</option> <option value="Opt7">Opt7</option> </select> and this is the function I tried in the <head> function selectCount(f) { var selObj = myForm.elements['element_17_1[]']; var totalChecked = 0; for (i = 0; i < selObj.options.length; i++) { if (selObj.options[i].selected) { totalChecked++; } } f.element_9.value = totalChecked; }

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How to store arbitrary data for some HTML tags

- by nickf

I'm making a page which has some interaction provided by javascript. Just as an example: links which send an AJAX request to get the content of articles and then display that data in a div. Obviously in this example, I need each link to store an extra bit of information: the id of the article. The way I've been handling it in case was to put that information in the href link this: <a class="article" href="#5"> I then use jQuery to find the a.article elements and attach the appropriate event handler. (don't get too hung up on the usability or semantics here, it's just an example) Anyway, this method works, but it smells a bit, and isn't extensible at all (what happens if the click function has more than one parameter? what if some of those parameters are optional?) The immediately obvious answer was to use attributes on the element. I mean, that's what they're for, right? (Kind of). <a articleid="5" href="link/for/non-js-users.html"> In my recent question I asked if this method was valid, and it turns out that short of defining my own DTD (I don't), then no, it's not valid or reliable. A common response was to put the data into the class attribute (though that might have been because of my poorly-chosen example), but to me, this smells even more. Yes it's technically valid, but it's not a great solution. Another method I'd used in the past was to actually generate some JS and insert it into the page in a <script> tag, creating a struct which would associate with the object. var myData = { link0 : { articleId : 5, target : '#showMessage' // etc... }, link1 : { articleId : 13 } }; <a href="..." id="link0"> But this can be a real pain in butt to maintain and is generally just very messy. So, to get to the question, how do you store arbitrary pieces of information for HTML tags?

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Shell halts while looping and 'transforming' values in dictionary (Python 2.7.5)

- by Gus

I'm building a program that will sum digits in a given list in a recursive way. Say, if the source list has 10 elements, the second list will have 9, the third 8 and so on until the last list that will have only one element. This is done by adding the first element to the second, then the second to the third and so on. I'm stuck without feedback from the shell. It halts without throwing any errors, then in a couple of seconds the fan is spinning like crazy. I've read quite a few posts here and changed my approach, but I'm not sure that what have so far can produce the results I'm looking for. Thanks in advance: #--------------------------------------------------- #functions #--------------------------------------------------- #sum up pairs in a list def reduce(inputList): i = 0 while (i < len(inputList)): #ref to current and next item j = i + 1 #don't go for the last item if j != len(inputList): #new number eq current + next number newNumber = inputList[i] + inputList[j] if newNumber >= 10: #reduce newNumber to single digit newNumber = sum(map(int, str(newNumber))) #collect into temp list outputList.append(newNumber) i = i + 1 return outputList; #--------------------------------------------------- #program starts here #--------------------------------------------------- outputList = [] sourceList = [7, 3, 1, 2, 1, 4, 6] counter = len(sourceList) dict = {} dict[0] = sourceList print '-------------' print 'Level 0:', dict[0] for i in range(counter): j = i + 1 if j != counter: baseList = dict.get(i) #check function to understand what it does newList = reduce(baseList) #new key and value from previous/transformed value dict[j] = newList print 'Level %d: %s' % (j, dict[j])

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text in div not going to next line

- by Kia Dull

for some reason the text in my div doesn't go to the next line, i've tried several different css elements which don't seem to work.... word-wrap:break word, just jumbles the letters... what i want is for one there is an extra word it goes down to the next line like it's supposed to here is my code this is the div it's in #top7 { width: 150px; height:auto; margin: 5px; display: block; float: left; word-wrap:break-word; } text that it's in #p6 { font-family: Myriad Pro; margin: 1px; font-size: 22px; background-color:#540f45; padding: 5px 5px 3px 4px; margin:4px; } a { text-decoration: none; color: white; text-align: right; font-family: Myriad Pro; } here is the php function that retrieves the data from the database <p id='p6'><?php echo "<a href='' "</a>"; ?></p> this is all wrapped in these two id's body { background:#603e4f; display: block; } #foursquare { background-color:#603e4f; width: 290px; display: block; position: absolute; }

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How to use XML namespace prefixes without xmlns="..." everywhere? (.NET)

- by LonelyPixel

The subject is probably too short to explain it... I'm writing out XML files with no namespace stuff at all, for some application. That part I cannot change. But now I'm going to extend those files with my own application-defined element names, and I'd like to put them in a different namespace. For this, the result should look like this: <doc xmlns:x="urn:my-app-uri"> <a>existing element name</a> <x:addon>my additional element name</x:addon> </doc> I've used an XmlNamespaceManager and added my URI with the prefix "x" to it. I've also passed it to each CreateElement for my additional element names. But the nearest I can get is this: <doc> <a>existing element name</a> <addon xmlns="urn:my-app-uri">my additional element name</addon> </doc> Or maybe also <x:addon xmlns:x="urn:my-app-uri">my additional element name</x:addon> So the point is that my URI is written to every single of my additional elements, and no common prefix is written to the document element where I'd like to have it. How can I get the above XML result with .NET?

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jquery: i have to use parseInt() even when deal with numbers, why?

- by Syom

i have the following script <select id="select1"> <option value="1">1day</option> <option value="2">2day</option> <option value="3">3day</option> </select> <select id="select2"> <option value="1">1day</option> <option value="2">2day</option> <option value="3">3day</option> </select> and jquery $("#select2").change(function() { var max_value = parseInt($("#select2 :selected").val()); var min_value = parseInt($("#select1 :selected").val()); if(max_value < min_value) { $("#select1").val($(this).val()); } }); and now, what i can't understand anyway - if values of option elements are integer numbers, why i have to use parseInt()? in some cases it doesn't work without parseInt(). Thanks

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deleting an array that stores pointers to some objects

- by memC

hi, I am storing pointers to elements of a vec_A in an array A* a_ptrs[3] . Assume that vec_A will not be resized. So, a_ptrs[i] will point to the correct element. My question is: Suppose A* a_ptrs[3] is declared in a class B. Since it is not created using 'new' I am guessing I don't need to delete it in the destructor. Am I right?? class A { public: int getNumber(); A(int val); ~A(){}; private: int num; }; A::A(int val){ num = val; }; int A::getNumber(){ return num; }; int main(){ int i =0; int num; std::vector<A> vec_A; for ( i = 0; i < 10; i++){ vec_A.push_back(A(i)); } A* a_ptrs[3]; a_ptrs[0] = &vec_A[0]; a_ptrs[1] = &vec_A[3]; a_ptrs[2] = &vec_A[5]; for (i = 0; i<3; i++){ std::cout<<"\n: a_ptrs[i].getNumber() = "<<a_ptrs[i]->getNumber(); } std::cout << "\nPress RETURN to continue..."; std::cin.get(); return 0; }

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Issue in alternate Row color using each() method of JQuery

- by user1323981

I have a table as under <table > <tr> <th scope="col">EmpId</th><th scope="col">EmpName</th> </tr> <tr> <td>1</td><td>ABC</td> </tr> <tr> <td>2</td><td>DEF</td> </tr> </table> I want to set the alternate row color of only the "td" elements of the table and not "th" by using only each() function. I have tried with <style type="text/css"> tr.even { background-color: green; } tr.odd { background-color: yellow; } </style> $(document).ready(function () { $('table > tbody').each(function () { $('tr:odd', this).addClass('odd').removeClass('even'); $('tr:even', this).addClass('even').removeClass('odd'); }); }); Though this works but it accepts also "th" element. How to avoid that? Please help Thanks

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My game plays itself?

- by sc8ing

I've been making a canvas game in HTML5 and am new to a lot of it. I would like to use solely javascript to create my elements too (it is easier to embed into other sites this way and I feel it is cleaner). I had my game reloading in order to play again, but I want to be able to keep track of the score and multiple other variables without having to put each into the URL (which I have been doing) to make it seem like the game is still going. I'm also going to add "power ups" and other things that need to be "remembered" by the script. Anyways, here's my question. When one player kills another, the game will play itself for a while and make my computer very slow until I reload the page. Why is it doing this? I cleared the interval for the main function (which loops the game and keeps everything running) and this used to make everything stop moving - it no longer does. What's wrong here? This is my game: http://dl.dropbox.com/u/11168436/game/game.html Controls: Move the skier with arrow keys and shoot with M (you shoot in the direction you were last moving in). The snowboarder is moved with ESDF and shoots with Q. Thanks for your time.

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List of Lists of different types

- by themarshal

One of the data structures in my current project requires that I store lists of various types (String, int, float, etc.). I need to be able to dynamically store any number of lists without knowing what types they'll be. I tried storing each list as an object, but I ran into problems trying to cast back into the appropriate type (it kept recognizing everything as a List<String>). For example: List<object> myLists = new List<object>(); public static void Main(string args[]) { // Create some lists... // Populate the lists... // Add the lists to myLists... for (int i = 0; i < myLists.Count; i++) { Console.WriteLine("{0} elements in list {1}", GetNumElements(i), i); } } public int GetNumElements(int index) { object o = myLists[index]; if (o is List<int>) return (o as List<int>).Count; if (o is List<String>) // <-- Always true!? return (o as List<String>).Count; // <-- Returning 0 for non-String Lists return -1; } Am I doing something incorrectly? Is there a better way to store a list of lists of various types, or is there a better way to determine if something is a list of a certain type?

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How do I remove 3 characters from the end of an NSURL?

- by saywhatman

Hey, my first question! I've been able to code up most of this RSS reader without enlisting help (through a lot of searches through stackoverflow!) but I'm stumped here. NSString *urlbase = [[NSString alloc] initWithFormat:[links3 objectAtIndex:indexPath.row]]; [[UIApplication sharedApplication] openURL:[NSURL URLWithString:urlbase]]; NSCharacterSet *whitespaces = [NSCharacterSet whitespaceCharacterSet]; NSPredicate *noEmptyStrings = [NSPredicate predicateWithFormat:@"SELF != ''"]; NSArray *parts = [urlbase componentsSeparatedByCharactersInSet:whitespaces]; NSArray *filteredArray = [parts filteredArrayUsingPredicate:noEmptyStrings]; urlbase = [filteredArray componentsJoinedByString:@" "]; NSLog(@"%@ %i" , urlbase, 4353); [[UIApplication sharedApplication] openURL:[NSURL URLWithString:urlbase]]; The links3 array is a NSMutableArray with strings. The first few lines work flawlessly in eliminating the space at the beginning each string from that array, which is stored in 'urlbase' so they look fine when they come out. When we NSLog urlbase, we see: http://www.feedzilla.com/r/D7E6204FEDBFE541314B997AAB5D2DF9CBA2EFEE But, when we use: [[UIApplication sharedApplication] openURL:[NSURL URLWithString:urlbase]] We see: http://www.feedzilla.com/r/D7E6204FEDBFE541314B997AAB5D2DF9CBA2EFEE%0A How can I fix this? Can I remove those tail elements somehow? Thanks!

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Using Visual Studio to make non aspx code-behind pages

- by rizzle

I want to build my own "code behind" like pages so that i can have HTML in a HTML file and code in cs file but be able to have Intellesense for the tokens in the HTML file. (i know that's what the .NET page class does, but i want to have something much lighter) EG: in the .html file: <%@ Directive classname="HTMLSnippet" %> <html> <body> <div>[%message%] </body> </html> and in a .cs file public class MyClass : HTMLSnippet { public class MyClass () { snippet.message = "message goes here" } } So my question is how do make the HTMLSnippet class so that it's members are automatically created, and specifically show up in Intellesense as i add tokens to the .html file? I know that .net currently does it by creating the designer.cs file and basically builds a class with all the elements from the page as it goes, and that would work fine but how can i get visual studio to generate that before compiling so that it shows up in Intellesense. Thanks! Clarification I'm not using this as a handler yet, i want to use this to have HTML snippets with tokens be usable in code as an object with properties. so almost like a custom control. I think what i have to do is create a VS add-in that waits for me to type tokens into an .html file then it automatically creates a .cs file with members for each token.

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how to create a linked list in java without using util package? [closed]

- by aparna

I do not want to use any of the elements of the UTIL package. I tried but I am not able to get to the next node. Can anyone please help me out? Thanks in advance. I have put up this much. public class Element { private String s; private Element next; } public Element(String s) { this.s = s; this.next = null; } public void setNext(Element e) { this.next = e; } public String getString() { return this.s; } public Element getNext() { return this.next; } public String toString() { return "[" + s + "] => "; } public void add(String s) { int index = 0; System.out.println("Adding at index: " + index); Element curr = new Element(s); Element e = this.data[index]; if (e == null) { this.data[index] = curr; return; } while(e.getNext() != null) { e = e.getNext(); } e.setNext(curr); } }

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Given a vector of maximum 10 000 natural and distinct numbers, find 4 numbers(a, b, c, d) such that

- by king_kong

Hi, I solved this problem by following a straightforward but not optimal algorithm. I sorted the vector in descending order and after that substracted numbers from max to min to see if I get a + b + c = d. Notice that I haven't used anywhere the fact that elements are natural, distinct and 10 000 at most. I suppose these details are the key. Does anyone here have a hint over an optimal way of solving this? Thank you in advance! Later Edit: My idea goes like this: '<<quicksort in descending order>>' for i:=0 to count { // after sorting, loop through the array int d := v[i]; for j:=i+1 to count { int dif1 := d - v[j]; int a := v[j]; for k:=j+1 to count { if (v[k] > dif1) continue; int dif2 := dif1 - v[k]; b := v[k]; for l:=k+1 to count { if (dif2 = v[l]) { c := dif2; return {a, b, c, d} } } } } } What do you think?(sorry for the bad indentation)

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Can I access type int (*)[] with [][]?

- by Framester

Hi coming from this question "What does (int (*)[])var1 stand for?" I tried to access the result of the cast like a multidimensional array. But I get following error: "assignment from incompatible pointer type" followed by a segmentation fault. I tried also some other variations, but none of them worked. How can I access the elements in var1 in the function example directly? Thank you! #include <stdlib.h> int i(int n,int m,int var1[n][m]) { var1[0][0]=5; return var1[0][0]; } int example() { int *var1 = malloc(100); // works int var2; var2 = i(10,10,(int (*)[])var1); printf("var2=%i",var2); //doesn't work I int *var3; var3=(int (*)[])var1; //"assignment from incompatible pointer type" printf("var3[0][0]=%i",var3[0][0]); //doesn't work II int *var4; var4=var1; printf("var4[0][0]=%i",var4[0][0]); //" error: subscripted value is neither array nor pointer" //doesn't work III int **var5; var5=var1; printf("var5[0][0]=%i",var5[0][0]); // assignment from incompatible pointer type return(1); } int main(){ int a; a=example(); return(1); }

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Convert binary unsigned vector to dec list

- by Juan

This code convert a unsigned long vector variable cR1 to NB_ERRORS numbers (in 'a' variable I print these numbers). for (l = 0; l < NB_ERRORS; ++l) { k = (l * EXT_DEGREE) / BIT_SIZE_OF_LONG; j = (l * EXT_DEGREE) % BIT_SIZE_OF_LONG; a = cR1[k] >> j; if(j + EXT_DEGREE > BIT_SIZE_OF_LONG) a ^= cR1[k + 1] << (BIT_SIZE_OF_LONG - j); a &= ((1 << EXT_DEGREE) - 1); printf("\na=%d\n",a); } For example I am have a cR1 with two elements that follow: 0,0,1,1,0,1,0,0,0,0,1,0,0,1,1,1,1,1,0,0,1,1,1,1,0,0,0,1,1,0,0,0,1,0,1,1,0,0,1,0,1,1,1,0,0,1,0,0,1,0,1,0,1,1,1,0,1,0,0,1,1,1,1,0, executing that code I get (44), (228, (243), (24), (77), (39), (117), (121). This code convert from right to left, I want modify to convert from right to left, Where I will be able to modify this? pdta: In the example case EXT_DEGREE = 8, BIT_SIZE_OF_LONG = 32

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How to transform huge xml files in java?

- by fx42

As the title says it, I have a huge xml file (GBs) <root> <keep> <stuff> ... </stuff> <morestuff> ... </morestuff> </keep> <discard> <stuff> ... </stuff> <morestuff> ... </morestuff> </discard> </root> and I'd like to transform it into a much smaller one which retains only a few of the elements. My parser should do the following: 1. Parse through the file until a relevant element starts. 2. Copy the whole relevant element (with children) to the output file. go to 1. step 1 is easy with SAX and impossible for DOM-parsers. step 2 is annoying with SAX, but easy with the DOM-Parser or XSLT. so what? - is there a neat way to combine SAX and DOM-Parser to do the task?

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Remove duplicates in a linked list before adding - C

- by DesperateCoders

Hi, My question is about removing duplicates from a linked list. But i want to do it before adding to linked list. struct myStr{int number; mystr *next;} void append(mystr **q,int item) { myStr *temp; temp = *q; myStr *newone; if(*q==NULL)// There should be control of previous elements. Call of keysearch function. { temp = (myStr *)malloc(sizeof(myStr)); temp->number =size; temp->next=NULL; *q=temp; } else //And also here { temp = *q; while(temp->next !=NULL) { temp=temp->next; } newone = (myStr *)malloc(sizeof(myStr)); newone->count = size; newone->next=NULL; temp->next=newone; } } int keysearch (myStr *p) { struct myStr *temp = p; int found = 0; int key= p->number; while (temp->number != NULL) { if(temp->number == key) { found = 1; } temp = temp->next; } return found; } My problem is in keySearch. I don't know what is wrong? Or is there another way for doing this.

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Returning a dynamically created array from function

- by informer2000

I'm trying to create a function that would dynamically allocate an array, sets the values of the elements, and returns the size of the array. The array variable is a pointer that is declared outside the function and passed as a parameter. Here is the code: #include <cstdlib> #include <iostream> using namespace std; int doArray(int *arr) { int sz = 10; arr = (int*) malloc(sizeof(int) * sz); for (int i=0; i<sz; i++) { arr[i] = i * 5; } return sz; } int main(int argc, char *argv[]) { int *arr = NULL; int size = doArray(arr); for (int i=0; i<size; i++) { cout << arr[i] << endl; } return 0; } For some reason, the program terminates on the first iteration of the for loop in main()! Am I doing something wrong?

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Issue with jQuery .submit()

- by d.lanza38

I'm having an issue submitting a form with the jquery .submit(); I don't have any elements on my page with a name of name="submit" or name="Submit", same goes for id's. My bit of jQuery code is as follows: $(document).ready(function () { $(document).on('click', "#appSubmit",function(e){ e.preventDefault(); var value = $("#time").val(); if(value == "--"){ $( "#err-time" ).dialog( "open" ); }else{ alert("1"); var dummy = $("#appSubmit").val(); alert(dummy); $("#appSubmit").submit(); alert("2"); } }); }); All of the alerts work properly, even the alert(dummy); prints out the correct value. The alert("2"); prints out, so it isn't even breaking on the $("#appSubmit").submit(); My submit button is <input type="submit" name="appSubmit" id="appSubmit" value="Apply"> Any thoughts would be appreciated, thanks.

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Empty vector of type <stuff*>

- by bo23

I have a vector populated with objects: std::vector<Stuff*> stuffVector; and am trying to delete all elements of it using a cleanup function void CleanUp() { for (std::vector<Stuff*>::size_type i = 0 ; i < stuffVector.size() ; i++) { stuffVector.erase(stuffVector.begin()+i); } cout << stuffVector.size() << endl; if (stuffVector.size() == 0) cout << "Vector Emptied" << endl; } This always reports back with a size of however many objects are in the vector, and doesn't actually seem to delete anything at all. It's odd as a similar function works elsewhere to delete a specific object from the vector: void DestroyStuff() { if (stuffVector.size() > 1) { for (std::vector<Stuff*>::size_type i = 0 ; i < stuffVector.size() ; i++ ) { if(stuffVector[i]->CanDestroy()) { stuffVector.erase (stuffVector.begin()+i); } } } } The above works fine, but CleanUp() does not. Why might this be happening?

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How to display inline several <li> with 100% width?

- by Rui

Hi, I have the following html: <div id="container"> <ul> <li>element 1</li> <li>element 2</li> </ul> </div> applied with a css as follows: #container { width:100%; overflow:auto; } #container ul { width: 100%; } #container li { width: 100%; } So now I would like to have an indeterminate number of elements (<li>) all with 100% width (so they can adjust accordingly to the browser's window size) but all side by side, displaying the horizontal scroll bar in the container. I have tried putting "display:inline" on ul's css, and "float:left" on li's css, but with no success. Any suggestions? Also, try to consider I'm trying to make this as "cross-browser compatible" as possible. Thanks in advanced;

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How do I size a second div to be 100% height underneath a fixed image?

- by mk

I'm using semi-transparent PNGs (due to the designer's overlapping of elements) and trying to achieve a layout that represents the design while still working well on the web. Thus I have simple HTML: <div id="right"> <div id="welcome"></div> <div id="welcomeRepeatingBottom"></div> </div> And I'm trying to use CSS as follows: #right { height: 100%; position: absolute; right: 0px; top: 0px; width: 430px; } #welcome { background-image: url("welcome.png"); height: 614px; width: 430px; position: absolute; top: 0px; left: 0px; } #welcomeRepeatingBottom { background: url("welcomeBottom.png") repeat-y; height: 100%; left: 0px; position: absolute; top: 614px; width: 430px; } The problem is...the #welcomeRepeatingBottom div can't overlap the #welcome div because of the transparency. What I really want is the #welcomeRepeatingBottom div to be height: 100% - 614px, but of course you can't do that. Am I missing something here or do I need to manipulate these values with JavaScript/JQuery?

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