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• Animating inline elements with JQuery

  - by rnielsen

  I am trying to show and hide an inline element (eg a span) using jquery. If I just use toggle(), it works as expected but if I use toggle("slow") to give it an animation, it turns the span into a block element and therefore inserts breaks. Is animation possible with inline elements? I would prefer a smooth sliding if possible, rather than a fade in. Thanks. <script type="text/javascript"> $(function(){ $('.toggle').click(function() { $('.hide').toggle("slow") }); }); </script> <p>Hello <span class="hide">there</span> jquery</p> <button class="toggle">Toggle</button>

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• llvm clang struct creating functions on the fly

  - by anon

  I'm using LLVM-clang on Linux. Suppose in foo.cpp I have: struct Foo { int x, y; }; How can I create a function "magic" such that: typedef (Foo) SomeFunc(Foo a, Foo b); SomeFunc func = magic("struct Foo { int x, y; };"); so that: func(SomeFunc a, SomeFunc b); // returns a.x + b.y; ? Note: So basically, "magic" needs to take a char*, have LLVM parse it to get how C++ lays out the struct, then create a function on the fly that returns a.x + b.y; Thanks!

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• python iterators and thread-safety

  - by Igor

  I have a class which is being operated on by two functions. One function creates a list of widgets and writes it into the class: def updateWidgets(self): widgets = self.generateWidgetList() self.widgets = widgets the other function deals with the widgets in some way: def workOnWidgets(self): for widget in self.widgets: self.workOnWidget(widget) each of these functions runs in it's own thread. the question is, what happens if the updateWidgets() thread executes while the workOnWidgets() thread is running? I am assuming that the iterator created as part of the for...in loop will keep some kind of reference to the old self.widgets object? So I will finish iterating over the old list... but I'd love to know for sure.

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• How do I get the sums of the digits of a large number in Haskell?

  - by Tim

  I'm a C++ Programmer trying to teach myself Haskell and it's proving to be challenging grasping the basics of using functions as a type of loop. I have a large number, 50!, and I need to add the sum of its digits. It's a relatively easy loop in C++ but I want to learn how to do it in Haskell. I've read some introductory guides and am able to get 50! with sum50fac.hs:: fac 0 = 1 fac n = n * fac n - 1 x = fac 50 main = print x Unfortunately at this point I'm not entirely sure how to approach the problem. Is it possible to write a function that adds (mod) x 10 to a value and then calls the same function again on x / 10 until x / 10 is less than 10? If that's not possible how should I approach this problem? Thanks!

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• Can't require local CoffeeScript modules

  - by superlukas

  I'm running Node.js 0.10.21. I tried both CoffeeScript 1.6.3 and master both with and without require('coffee-script/extensions'). Compiling the two files to JavaScript and running them directly in Node works just fine of course. # ./folder/a.coffee require('../b').test() # ./b.coffee exports.test = -> console.log 'yay' # $ coffee folder/a.coffee # # Error: Cannot find module '../b' # at Function.Module._resolveFilename (module.js:338:15) # at Function.Module._load (module.js:280:25) # at Module.require (module.js:364:17) # at require (module.js:380:17) # at Object.<anonymous> (/Users/test/folder/a.coffee:1:1) # at Module._compile (module.js:456:26)

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• javascript constructor reset: What is it ?

  - by Sake

  I came across this slide: http://www.slideshare.net/stoyan/javascript-patterns#postComment at page 35: Option 5 + super + constructor reset function inherit(C, P) { var F = function(){}; F.prototype = P.prototype; C.prototype = new F(); C.uber = P.prototype; C.prototype.constructor = C; // WHY ??? } I don't get it. Can anybody please explain what the last line for ? C.prototype.constructor = C; // WHY ??? Thanks

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• Javascript Problem! Not changing the css style

  - by mathew

  I have this code in JavaScript: function change() { document.getElementById("mem").className = 'gif'; } The fig and gif are like this: a.fig { background: #FFFFFF; } a.gif { background: #000099 ; } and the function is used like this <a class ="fig" id ="mem" onClick="javascript:change()" href="users" > Where the only difference between gif and fig in CSS is that they have different background colors. The problem is that the change is only noticeable in just a second and it is not permanent! Any ideas?

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• How to strip a GET property from the URL using PHP

  - by James

  I have the following function that get's the current page URL: <?php // get current page url function currentPageUrl() { $pageURL = 'http'; if ($_SERVER["HTTPS"] == "on") {$pageURL .= "s";} $pageURL .= "://"; if ($_SERVER["SERVER_PORT"] != "80") { $pageURL .= $_SERVER["SERVER_NAME"].":".$_SERVER["SERVER_PORT"].$_SERVER["REQUEST_URI"]; } else { $pageURL .= $_SERVER["SERVER_NAME"].$_SERVER["REQUEST_URI"]; } echo $pageURL; } ?> Which prints: http://localhost/gallery.php?id=23&type=main I want to remove "&type=main" which is present in the url. So before echoing $pageURL I add the following line: $pageUrl = preg_replace("&type=main", "", $pageURL); But it still returns the full url including type=main. How can I get rid of that from the url?

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• Removing DIVs in a jquery dialog

  - by Macinville

  I have a dialog window that uses a URL for its contents { function(){jQuery.ajax({'success':function(html) { jQuery('#menu_dialog').html(html); $('#menu_dialog').dialog('open'); $('#header').hide(); },'url':'/testing/index.php/menu','cache':false});return false;}; } What happens is that it was displaying the whole page, including the header, the footer,navigation menu,etc. What I want is for the dialog to only display the content inside the <content> tag. How can I remove the unnecessary divs in the dialog window?

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• How to unmangle exported symbols from C++ in dynamic libraries in XCode on OSX

  - by Gerald

  I've been trying to develop a dynamic library in C++ that can be run-time loaded in an application. I finally got it working, but it's a little ugly. I have a function that takes a pointer to a C++ class as an argument, which looks like this: bool registerGrindPlugin( Grind::PluginManager* mgr ); But of course it's being exported as: _Z19registerGrindPluginPN5Grind13PluginManagerE I tried a .c file with a simple function and it exported fine as "registerGrindPlugin", but of course I can't pass a C++ class as the argument that way. Soo... my question is, is there a way to unmangle or alias the exported symbol so that I don't have to use a monstrosity like Z19registerGrindPluginPN5Grind13PluginManagerE in my dlsym call? I did see something about -alias_list as a linker option, but I haven't quite figured out how to use it in XCode. If that is the solution, can somebody provide some more details on how to use this?

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• how to send string from/To C++ (6.0) to C++ DLL?

  - by Ahmed Mostafa

  When I send text to my DLL and receive it as char*, something strange happens; if the text is less than 13 characters or greater than 77 characters the text returned is rubbish! Here is my code:- //(1) DLL function: char* __stdcall ApplyArabicMapping( char* input) { // 1-Conver char* to string std::string inputString = input; // 2-Calling our function string encodedStr = Encoding::arabicHandling(inputString); // 3-Convert from String to char* char* returnStr = (char*)encodedStr.c_str(); return (returnStr); } //(2) Calling from C++ console application: char* inputStr = "Some text"; char* resutls = ApplyArabicMapping(inputStr);

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• AutoHotkey ControlSend problem on one machine

  - by Illotus

  I have this AutoHotkey script that has a weird problem. It is used in 3 workstations, but in one the ControlSend doesn't seem to work as the hotkey doesn't work in program A. All three machines have Windows XP and are Pentium 4 level machines with mostly same software, the script is in exe form. I've tried a lot of different ways to send the hotkey to Program A, but nothing seems to work. The idea of the script is simply to catch a hotkey and click in another window in addition to its normal function. The normal function just doesn't work. Any ideas what could be the root of the problem and where I should look for it? #IfWinActive, Program A ^H:: IfWinActive, Program A { ControlFocus, MDIClient1, Program A, , , ControlSend, , ^H, Program A, , , ControlClick, X46 Y135, Program B, , LEFT , 1 return }

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• MySQL triggers cannot update rows in same table the trigger is assigned to. Suggested workaround?

  - by Cory House

  MySQL doesn't currently support updating rows in the same table the trigger is assigned to since the call could become recursive. Does anyone have suggestions on a good workaround/alternative? Right now my plan is to call a stored procedure that performs the logic I really wanted in a trigger, but I'd love to hear how others have gotten around this limitation. Edit: A little more background as requested. I have a table that stores product attribute assignments. When a new parent product record is inserted, I'd like the trigger to perform a corresponding insert in the same table for each child record. This denormalization is necessary for performance. MySQL doesn't support this and throws: Can't update table 'mytable' in stored function/trigger because it is already used by statement which invoked this stored function/trigger. A long discussion on the issue on the MySQL forums basically lead to: Use a stored proc, which is what I went with for now. Thanks in advance!

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• UIButtons creating a native-like keyboard behavior.

  - by camilo

  Greets. A somehow detailed explanation on my problem, and what I have already done, and what I cannot do. I want to create a behavior resembling the one in the iPhone's keyboard. Basically, I want a view to appear when the user taps a button and WHILE the user taps that button. This, I accomplished. When the user lets go of the button WHILE his finger is on that button's area, I want to trigger an action "doing stuff". This, I was also able to do. Since all the buttons are near (like in the keyboard) and I don't want the user to select other button than the one he pressed, I reduced the hit area for the button using the -(BOOL)pointInside:(CGPoint)point withEvent:(UIEvent )event function. When the user presses the button, not lifting its finger, and dragging outside the button area, I want another action to trigger. This is the first problem... This function only triggers when the user's finger is far from the buttons' area, and this time the pointInside function is not being my friend. How can I detect the user finger "left" the button area the moment it exits its bounds? This, in case you didn't realize... was problem 1. The second problem is related with the drag enter. Again, I need to limit the area like in the drag exit. But I suppose that when I solve one of these, the other is the same. The problem is that in order to have a behavior like in the keyboard, I may need to detect the user started the touch in another button, never lifted his finger, and changed to another button. I can detect drag enter and drag exit IN THIS ORDER while on the same button. I cannot detect drag enter when the user first touched anywhere else other than the button where I want to detect the drag enter event. Basically what I need is to detect touch on any button (and not anywhere else in the view), and while the user is changing buttons without lifting the finger, I want to detect the new button being touched. This gigantic paragraph was problem #2. Any help, as you might guess, is highly appreciated. Best Regards. Thanks a lot!

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• Track/Display Array Index As Part Of Cout (C++)

  - by John Smith

  Hi, I have a command line C++ program that lets you enter basic information about a person (ID number, name, age, etc.) and I want to output to a console in the following manner: ------------------------------------------------------------------- Index ID # First Name Last Name Age ------------------------------------------------------------------- 0 1234 John Smith 25 The person objects are stored in an array of Persons and I've overload the ostream (<<) operator to print out all of the fields like you see. The dashed lines and header come from a displayHdg() function. Anyhow, I have not been able to figure out how to get the proper index value for the array. Ideally, I'd like to generate the indices for each line, but all my attempts have failed. The array is looped through and each object printed in the main() function, and the ostream is overloaded in a person class, so I tried to use global variables as well as static variables, and all of those produce incorrect numbering (i.e. show 0, 1 the first time (for 2 objects), then change to 1, 2 on the next display). Any ideas?

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• F# Extention Methods on Lists, IEnumberable, etc

  - by flevine100

  I have searched StackOverflow (and other sources) for this answer, but can't seem to find anything. In C#, if I had a widget definition, say: class widget { public string PrettyName() { ... do stuff here } } and I wanted to allow for easy printing of a list of Widgets, I might do this: namespace ExtensionMethods { public static PrintAll( this IEnumerable<Widget> widgets, TextWriter writer ) { foreach(var w in widgets) { writer.WriteLine( w.PrettyName() ) } } } How would I accomplish something similar with a record type and a collection (List or Seq preferrably in F#). I'd love to have a list of Widgest and be able to call a function right on the collection that did something like this. Assume (since it's F#) that the function would not be changing the state of the collection that it's attached to, but returning some new value.

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• Sending parameters to jquery callback

  - by KhanS

  I am making a jquery call from a javascript method. I want a parameter to be sent to my call back method. I am using a handler(ashx) to make jquery call, the handler is getting invoked by the callback is not getting fired. Below is the code function MyButtonClick(){ var myDiv = "divname"; $.post("MyHandler.ashx", { tgt: 1 }, myDiv, CustomCallBack); } function CustomCallBack(data, result) { debugger; //SomeCode } } Handler code(ashx file) public void ProcessRequest(HttpContext context) { context.Response.ContentType = "text/plain"; int tgt = Convert.ToInt32(context.Request["tgt"]); if (tgt == 1) { context.Response.Write("Some text"); } }

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• Generic linked list in c++

  - by itsaboy

  I have been struggling for too long a time now with a rather simple question about how to create a generic linked list in c++. The list should be able contain several types of structs, but each list will only contain one type of struct. The problem arises when I want to implement the getNode() function [see below], because then I have to specify which of the structs it should return. I have tried to substitute the structs with classes, where the getNode function returns a base class that is inherited by all the other classes, but it still does not do the trick, since the compiler does not allow the getNode function to return anything but the base class then. So here is some code snippet: typedef struct struct1 { int param1; (...) } struct1; typedef struct struct2 { double param1; (...) } struct2; typedef struct node { struct1 data; node* link; } node; class LinkedList { public: node *first; int nbrOfNodes; LinkedList(); void addNode(struct1); struct1 getNode(); bool isEmpty(); }; LinkedList::LinkedList() { first = NULL; nbrOfNodes = 0; } void LinkedList::addNode(struct1 newData) { if (nbrOfNodes == 0) { first = new node; first->data = newData; } else { node *it = first; for (int i = 0; i < nbrOfNodes; i++) { it = it->link; } node *newNode = new node; newNode->data = newData; it->link = newNode; } nbrOfNodes++; } bool LinkedList::isEmpty() { return !nbrOfNodes; } struct1 LinkedList::getNode() { param1 returnData = first->data; node* deleteNode = first; nbrOfNodes--; if (nbrOfNodes) first = deleteNode->link; delete deleteNode; return returnData; } So the question, put in one sentence, is as follows: How do I adjust the above linked list class so that it can also be used for struct2, without having to create a new almost identical list class for struct2 objects? As I said above, each instance of LinkedList will only deal with either struct1 or struct2. Grateful for hints or help

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• Google API fonts in a select box

  - by Vivek Dragon

  get all available fonts from google font api I like to apply the same function in my Fiddle HTML <select id="styleFont"> <option value="0">Myraid Pro</option> <option value="1">Sans ref</option> <option value="2">Times New Roman</option> <option value="3"> Arial</option> </select> <br> <textarea id="custom_text"></textarea> CSS #custom_text{ resize: none;}? Script $("#styleFont").change(function () { var id =$('#styleFont option' + ':selected').text(); $("#custom_text").css('font-family',id); });? I tried to add the google API fonts in my select box by using https://www.googleapis.com/webfonts/v1/webfonts?key=YOUR-API-KEY how to add this to my html page

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• Name of several objects that have the same type

  - by Tomek Tarczynski

  Lets assume we have a class car. How would You name parameters of function that takes two different cars? void Race(Car first, Car second); or maybe void Race(Car car1, Car car2); The same situation with function that takes car and list of cars as a parameters. I'm used to name 'cars' for list of cars, so it is inconvenient to use names like: void Race(Car car, List<Car> cars); Any suggestions about names?

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• Pinterest Gridview implementation on iOS

  - by Amal

  I want to implement a grid view like the one in Pinterest I thought about implementing as 3 table views. But I was not able to scroll them together well. When I implemented the scrollViewDidScroll and set the contentOffset for the table views other the scrollView , the scrolling became slow and unusable. Another implementation I did was of was having a set of images to load and calling the viewDraw function in scrollViewDidScroll. THe ViewDraw function just draws the necessary images and removes the rest of the images from the memory which were already drawn but wont be visible . this too makes the ScrollView Scrolling slow. And another issue with it is that there are white(background color) patches before the images are drawn. What should be the best way to implement this grid view ?

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• cross-domain data with AJAX using JSONP

  - by kooshka

  I'm trying to get data from Geobytes. One of the templates returns JSON and I need to cross-domain access it. I wrote these 2 functions function getCountry(ip) { var surl = "http://www.geobytes.com/IpLocator.htm?GetLocation&template=json.txt"; $.ajax({ url: surl, data: '{"ipaddress":"' + ip + '"}', dataType: "jsonp", jsonp: "callback", jsonpCallback: "jsonpcallback" }); } function jsonpcallback(rtndata) { alert(rtndata.message); } The call is executed but I get 1 warning: Resource interpreted as Script but transferred with MIME type text/html: "http://www.geobytes.com/IpLocator.htm?GetLocation&template=json.txt&callback=jsonpcallback&{%22ipaddress%22:%22200.167.254.166%22}&_=1353148931121" 1 Error: Uncaught SyntaxError: Unexpected token : The error is thrown on the returned data at {"geobytes":{"countryid":117, I think is maybe because it's 117 and not "117" but I obviously can't control the returned data How can I fix these 2 issues?

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• What is the difference between Window.load and document.readyState

  - by prakash

  Hi All, I have one question , In my ASP.NET MVC web application i have to do certain validation once page and all controls got loaded. In javascript i was using belwow line of code for calling a method. window.load = JavascriptFunctionName ; Some one from my team asked me not used above line of code Instead use JQuery to do the same document.attachEvent("onreadystatechange", function() { if (document.readyState === "complete") { CheckThis(); } }); Please help me in understanding what is the difference between two. When i tested by keeping alert in both Jquery check is executing first and calling the CheckThis function where as window.load is taking some time and executing after it. Please suggest

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• The reason for MonadState get and put?

  - by CiscoIPPhone

  I'm reading the Monads chapter in Real World Haskell (chapter 14). A function is defined as follows: type RandomState a = State StdGen a getRandom :: Random a => RandomState a getRandom = get >>= \gen -> let (val, gen')= random gen in put gen' >> return val I don't really understand the purpose of the get and put functions here. I rewrote the function as following which seems to do the same thing and is more concise: getRandom2 :: Random a => RandomState a getRandom2= State $ \ s -> random s So my question is: What is the purpose of get and put?

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• Randomized experiments in R

  - by gd047

  Here is a simple randomized experiment. In the following code I calculate the p-value under the null hypothesis that two different fertilizers applied to tomato plants have no effect in plants yields. The first random sample (x) comes from plants where a standard fertilizer has been used, while an "improved" one has been used in the plants where the second sample (y) comes from. x <- c(11.4,25.3,29.9,16.5,21.1) y <- c(23.7,26.6,28.5,14.2,17.9,24.3) total <- c(x,y) first <- combn(total,length(x)) second <- apply(first,2,function(x) total[!total %in% x]) dif.treat <- apply(second,2,mean) - apply(first,2,mean) # the first element of dif.treat is the one that I'm interested in (p.value <- length(dif.treat[dif.treat >= dif.treat[1]]) / length(dif.treat)) Do you know of any R function that performs tests like this one?

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