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  • stl priority queue based on lower value first

    - by russell
    I have a problem with stl priority queue.I want to have the priority queue in the increasing order,which is decreasing by default.Is there any way to do this in priority queue. And what is the complexity of building stl priority queue.If i use quick sort in an array which takes O(nlgn) is its complexity is similar to using priority queue??? Plz someone ans.Advanced thanx.

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  • dangling pointer, reason for value change after free()?

    - by Aman Jain
    In the following code segment, after free(x), why does y becomes 0? As per my understanding, the memory in the heap that was being pointed to by x, and is still being pointed by y, hasn't been allocated to someone else, so how can it change to 0? And moreover, I don't think it is free(x) that changed it to 0. Any comments? #include <stdio.h> int main ( int argc, char *argv[] ) { int *y = NULL; int *x = NULL; x = malloc(4); *x = 5; y = x; printf("[%d]\n", *y); //prints 5 free(x); printf("[%d]\n", *y); //why doesn't print 5?, prints 0 instead return 0; }

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  • Illegal offset type error when => value is omitted

    - by thomas
    Line 3 of the code below fails if I omit the => $v portion. I get the following error: Warning: Illegal offset type in /home/site/page.php on line 404 When the [$k] in line 5 is changed to ['$k'], i receive the following error. Notice: Undefined index: $k in /home/site/page.php on line 404 When it is like below with the the full $k => $v everything works though. I don't even use $v. Why do I need it in the foreach loop to make it work then? <? if ( $arr[ 'status'][ 'chain'] ) { foreach ( $arr[ 'status'][ 'chain'] as $k => $v) { ?> <tr> <td class="line_item_data status_td"> <?= $ arr[ 'status'][ 'chain'][$k][ 'message'] ?> </td> <td align="center"> <img src="images/green_check.gif" width="20" /> </td> </tr> <? } } ?> I did see this answer, but don't know that it really applies. Thanks so much!

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  • Why won't C++ allow this default value

    - by nieldw
    Why won't GCC allow a default parameter here? template<class edgeDecor, class vertexDecor, bool dir> Graph<edgeDecor,int,dir> Graph<edgeDecor,vertexDecor,dir>::Dijkstra(vertex s, bool print = false) const { This is the output I get: graph.h:82: error: default argument given for parameter 2 of ‘Graph<edgeDecor, int, dir> Graph<edgeDecor, vertexDecor, dir>::Dijkstra(Vertex<edgeDecor, vertexDecor, dir>, bool)’ graph.h:36: error: after previous specification in ‘Graph<edgeDecor, int, dir> Graph<edgeDecor, vertexDecor, dir>::Dijkstra(Vertex<edgeDecor, vertexDecor, dir>, bool)’ Can anyone see why I'm getting this?

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  • Database design - alternatives for Entity Attribute Value (AEV)

    - by Bob
    Hi, see http://stackoverflow.com/questions/695752/product-table-many-kinds-of-product-each-product-has-many-parameters for similar topic. My question: i want to design a database, that will be used for a production facility of different types of products where each product has its own (number of) parameters. because i want the serial numbers to be in one tabel for overview purposes i have a problem with these different paraeters . One solution could be AEV, but it has its downsides, certainly because we have +- 5 products with every product +- 20.000 serial numbers (records). it looks a bit overkill to me... I just don't know how one could design a database so that you have an attribute in a mastertable that says: 'hey, you could find details of this record in THAT detail-table". 'in a way that you qould easely query the results) currenty i am using Visual Basic & Acces 2007. but i'm going to Visual Basic & MySQL. thanks for your help. Bob

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  • A potentially dangerous Request.Form value was detected: Dealing with these errors proactively, or a

    - by Albert
    I'm noticing this error more and more in my error logs. I've read through the questions here talking about this error, but they don't address what I would like to do (see below). I'm considering three options, in the order of preference: 1) When submitting a form (I use formviews almost exclusively, if that helps), if potentially dangerous characters are detected, automatically strip them out and submit. 2) When submitting a form, if potentially dangerous characters are detected, alert the user and let them fix it before trying again. 3) After the exception is generated, deal with it and alert the user. I'm hoping one of the first two options might be able to do somewhat globally...I know for the 3rd I'd have to alter a TON of Try-Catch blocks I already have in place. Doable, but labor intensive. I'd rather be proactive about it if at all possible and avoid the exception all together. Perhaps one approach to #1 would be to write a block of code that could loop through all text entry fields in a formview, during the insert/update event, and strip the characters out. I'm ok with that, but I'd rather not have to heavily alter all my Insert/Update events to accomplish this. Or maybe I just create a different class to do the text checking/deleting, and only insert 1 line of code in each Insert/Update event. If anyone can come up with some example code of any of these approaches that would be a help. Thanks for any ideas or information. I'm definitely open to other solutions too; these are only the 3 that came to mind. I can say that I don't want to turn request validation off though.

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  • Storing/Quering multiple value in SQLite

    - by chmod
    I'm trying to store a blooming season in month for each tree in SQLite3. Currently I had the field "month" then I store the month name in the field. For example Tree Name Month Tree1 Jan,Feb,Mar Tree2 Nov,Dec,Jan Tree3 Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec Tree4 Mar,Apr,Nov,Dec Tree5 Jan,Feb,Mar,Apr I'm not sure if this is the best way to store it, Any recommendation is appreciate. Secondly, I need to perform a query where I enter in the month and it should return me the tree name that match the search criteria. For example If I search for "Jan" the result should be Tree1,Tree2,Tree3,Tree5 "Jan,Feb,Mar" the result should be Tree1,Tree3,Tree5 "Jan,Feb,Mar,Apr" the result should be Tree5 "Sep,Oct,Nov,Dec" the result should be none Which SQL query do I have to use in order to obtain the above result? Thanks

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  • Is it appropriate to set a value to a "const char *" in the header file

    - by sud
    I have seen people using 2 methods to declare and define char * Medhod-1: The header file has the below const char* COUNTRY_NAME_USA = "USA"; Medhod-2: The header file has the below declaration const char* COUNTRY_NAME_USA; The cpp file has the below defintion : const char* COUNTRY_NAME_USA = "USA"; Is method-2 wrong in some way ? What is the difference between the two ? I understand the difference between "const char * const var" , and "const char * var". If in the above methods if a "const char * const var" is declared and defined in the header as in method 1 will it make sense ?

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  • increase a field value based on the radio button selection

    - by sts
    <% count = 1 % <% for question in @questions % <%=count%. <%= question.title if question.title% <% for response in @response % <% if response.question_id.eql?(question.id) % <%=radio_button(count, :voting, :count_modification) % <%= response.nomination % <% end % <% end % <% count += 1 % <% end % This is my whole code to implment the survey in views. if i give the count as third argument in radio button i cant select answer for each question. i can select only one answer for the whole survey.

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  • perl ENV value avoid escape

    - by Michael
    In my makefile I have command in variable like this substitute := perl -p -e 's/@([^@]+)@/"$(update_url)"/ge' > output.txt update_url := em:updateURL=\"http:\/\/bla\/update.rdf\"\n this works fine when I run command in target and I have newline, quotes however I need to replace $(update_url)" with environment variable, using expression like this #substitute := perl -p -e 's/@([^@]+)@/defined $$ENV{$$1} ? $$ENV{$$1} : $$1/ge' I am exporting those variables from makefile. This gives me literally em:updateURL=\"http:\/\/bla\/update.rdf\"\n on output file... so how to make the second version to give output like first version?

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  • Saving model object in django throws no error but attribute value doesn't change

    - by Pilgrim
    Hi. I get a model object, change an attribute, save it and it still has the old attribute: >>> g = SiteProfile.objects.get(pk=3) >>> g.renew_date datetime.date(2010, 4, 11) >>> g.renew_date = date.today()+timedelta(days=365) >>> g.renew_date datetime.date(2011, 4, 11) >>> g.save() >>> g.renew_date datetime.datetime(2010, 4, 11, 16, 57, 4, 192684) Anyone know if this is an issue with the database or something else?

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  • ff extension: how to read a cookie name and value on the current page

    - by encryptor
    My extension works on a application, which requires user login. Once the user has logged in, I need to read the cookies and use them in my xmlhttprequests. So initially i need to check if the cookie is set, if not, I direct the user to the login page. Once logged in, I need to read the cookies and send it as part of mt further requests. Can someone plese help me on how to read cookies from a xmlhttprequest or otherwise (if we dont even know the name of the cookie) there is to function as getRequestHeader.. but what i need is something like that

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  • The bigger value in a matrix row

    - by marionmaiden
    How can I get the 2 biggers numbers of a matrix row? If the matrix have a bigger number in other row, it can't be shown. For example, let's suppose I have the following matrix int mat[][] ={{1,2,3}{4,5,6}{7,8,9}}; if I search the 2 biggers numbers from the row 0, it should return me 1 and 2.

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  • Query multiple models with one value

    - by swoei
    I have multiple models which all have a FK to the same model. All I know is the FK how can I determine which of the models has the FK attached? Below an example to clearify: class ModelA(models.Model): title = models.CharField("title", max_length=80) class ModelB(models.Model): fk = models.ForeignKey(ModelA) class ModelC(models.Model): fk = models.ForeignKey(ModelA) How can I figure out without using a try/except on each model whether B or C has the FK? (The FK can only be in one of them, for the record in this case I only added two models but in the real world app there are multiple possible x amount of models which have the FK to modelA)

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  • JQuery selfbuild plugin question - default value is overwritten.

    - by Bruno
    Hi jQuery ninjas. I need your help. I have made a really clean and simple example to illustrate my problem. I have build my own jquery plugin: (function($) { $.fn.setColorTest = function(options) { options = $.extend($.fn.setColorTest.defaults,options); return this.each(function() { $(this).css({ 'color': options.color}); }); } $.fn.setColorTest.defaults = { color: '#000' }; })(jQuery); As you can see I'm setting a default color and making it possible for the user to change it. My problem/question is: I have two paragraphs on the same page where I want to use the default color for the first and a different color for the second paragraph: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <title>Color Test</title> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script> <script type="text/javascript"> $(document).ready(function() { $('a#click').click(function() { $('#test1').setColorTest(); }); $('a#click2').click(function() { $('#test2').setColorTest({color: '#fff666'}); }); }); </script> </head> <body> <a id="click">click here</a> <a id="click2">click here2</a> <p id="test1">Test 1</p> <p id="test2">Test 2</p> </body> </html> My problem is that if I click on the second paragraph (p) that overrides the default color and afterwards clicks on the first p it will use the overwritten color and not the default color for the first p. How can I ensure that the first p always will use the default color? I know I can just define the color for the first p as well but that is not an option here $('#test1').setColorTest('color': '#000'); So what to do?

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  • Good practice : compare a value with a boolean?

    - by NLemay
    Most of the time, I prefer to write this : if(isWelcome() == true){} if(isWelcome() == false){} instead of this if(isWelcome()){} if(!isWelcome()){} Because I feel that it is easier to read (but I do understand that it doesn't make sense). I would like to know if there is a common agreement about this practice. What most developer do? And I'm wondering if the compiler is doing the extra comparaison, or if it understand that it is useless.

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  • submit the value of check box in database

    - by ritu
    <?php $dates = $day1 ; echo "<p>"; for($i=0;$i<count($dates);$i++) { if($i>0 && ($i%3==0)) { echo "</p><p>"; } echo "<input type='checkbox' name='dates[".$dates."]' /><label>".$dates[$i]."</label>"; } echo "</p>"; ?> whan i use this output will be desire Ex 1 2 3 4 5 6 but i want send his data in the databse but only a array will be send into the database $_post[dates so can any on telll me how can i send the data in the database

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  • Injecting a response value into a textarea to subsequently post

    - by Ashbyrich
    I have multiple notes with class=.note and unique id each inside a div. On click of edit I grab the id, show hidden form #noteditor and hide all notes. I am using the load function to get the response (using codeigniter so url does work) and input result in the editorfrorm Textarea id = upnote... Firebug response looks ok and I have tried to inject into a div and this works fine, BUT getting this injto the text area is causing me some headaches. There is also the chance that i am going around this a convoluted way due to my limited knowledge... Any help or pointers v much appreciated... $(document).ready(function() { $('.edit').click(function(e){ var v=$(this).attr("id"); $(".note").slideUp(); $("#noteditor").slideDown('1000'); $("#upnote" ).load('/notes/my_note/'+v); e.preventDefault(); });

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  • Ruby - print the variable name and then its value

    - by tyndall
    What is the best way to write a function (or something DSLish) that will allow me to write this code in Ruby. How would I construct the function write_pair? username = "tyndall" write_pair username # where write_pair username outputs username: tyndall Is it possible to do? Looking for the most simple way to do this.

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  • Get a DB result with a value between two column values

    - by vitto
    Hi, I have a database situation where I'd like to get a user profile row by a user age range. this is my db: table_users username age email url pippo 15 [email protected] http://example.com pluto 33 [email protected] http://example.com mikey 78 [email protected] http://example.com table_profiles p_name start_age_range stop_age_range young 10 29 adult 30 69 old 70 inf I use MySQL and PHP but I don't know if there is some specific tacnique to do this and of course if it's possible. # so something like: SELECT * FROM table_profiles AS profiles INNER JOIN table_users AS users # can I do something like this? ON users.age IS BETWEEN profiles.start_age_range AND profiles.stop_age_range

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  • How to return a value when destroying/cleaning-up an object instance

    - by Mridang Agarwalla
    When I initiate a class in Python, I give it some values. I then call method in the class which does something. Here's a snippet: class TestClass(): def __init__(self): self.counter = 0 def doSomething(self): self.counter = self.counter + 1 print 'Hiya' if __name__ == "__main__": obj = TestClass() obj.doSomething() obj.doSomething() obj.doSomething() print obj.counter As you can see, everytime I call the doSomething method, it prints some text and increments an internal variable i.e. counter. When I initiate the class, i set the counter variable to 0. When I destroy the object, I'd like to return the internal counter variable. What would be a good way of doing this? I wanted to know if there were other ways apart from doing stuff like: accessing the variable directly. Like obj.counter. creating a method like getCounter. Thanks.

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  • JAVE function call form JSP page is not returning value

    - by Satyendra
    I am calling a java function from JSP page which returns file name after creationg a XML file. In some cases where size of file is large(Java function execution takes much time due to large data) it is returning blank where as XML file is genertaed after some time. Can any one help me to get the file name in this case so that user can know the generated file name.

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  • AJAX XML reply node value iteration

    - by XpiritO
    Hi there, guys. I would really appreciate to get your help on this, as I can't seem to detect and solve the problem I'm having with an AJAX functionality on a site that I'm currently developing. I have a webform that makes an asynchronous call to a handler (.ashx) that delivers a XML response that is later processed by a Javascript client-side function that places it's contents into the user-interface. I'm attaching an example of the response generated by my handler, and what I would like to know is how can I get all the <body> element innerHTML (with the text and child nodes) contents to append it to a <span> element on the user-interface. Can anyone help me out with this? XML Response returned by the handler (checked via Firebug): <message> <content> <messageId>2</messageId> <from>Barack Obama</from> <fromMail>[email protected]</fromMail> <subject>Yes, we can... get World Peace</subject> <body>Hello, dear citizen. I'm sending you this message to invite you to join us! <a href="http://www.whitehouse.gov">Test link</a> Thank you for your time.</body> </content> </message> Client-side Javascript function to affect the user-interface innerHTML property with the data returned via AJAX: function GetMessageContentsCallback(args, resp) { //XML Parser try { //Internet Explorer xmlDoc = new ActiveXObject("Microsoft.XMLDOM"); xmlDoc.async = "false"; xmlDoc.loadXML(resp); } catch (e) { parser = new DOMParser(); xmlDoc = parser.parseFromString(resp, "text/xml"); } var msgReply = xmlDoc.getElementsByTagName('message')[0]; var ajaxRespondeBodyInnerHTML = msgReply.getElementsByTagName(body)[0].firstChild.nodeValue; //this currently only delivers inner text content, without the <a href... bit and subsequent text document.getElementById("bodySpan").innerHTML = ajaxRespondeBodyInnerHTML; }

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