Search Results

Search found 46484 results on 1860 pages for 'function handle'.

Page 488/1860 | < Previous Page | 484 485 486 487 488 489 490 491 492 493 494 495  | Next Page >

  • A question about friend functions

    - by Als
    I faced a problem recently with a 3rd party library which generates classes from a xml. Here is a gist of it: class B; class A { void doSomething(); friend class B; }; class B { void doSomething(); void doSomethingMore() { doSomething(); } }; The compiler flags call to the function doSomething() as ambiguous and flags it as an compiler error. It is easy to understand why it gives the error.Class B being friend of class A, every member of class B has access to all the members of class A. Renaming of the either of functions resolved my problem but it got me thinking that shouldn't in this case the compiler should give a priority to the class's own member function over the function in another class of which it is a friend?

    Read the article

  • Understanding a skelton of jQuery plugin

    - by TK
    At a website, I found the following code to make a jQuery plugin: (function($){ // Our code here... })(jQuery); I don't understand how the code above works. What I understand is that the code executes immediately because the very last () in function(){}(). So the entire code says that is an anonymous function that is run immediately. But I don't understand why the wrapping needs to pass jQuery and that inside it needs $ to be passed. From my understanding, $ is an alias to jQuery, meaning practically the same. What is the meaning of $ and jQuery here? How does the overall code work as a jQuery plugin?

    Read the article

  • Last in First out UDP structure in MatLab.

    - by D Zondervan
    I am using MatLabs UDP function in their instrument control toolbox to send data packets from one computer to another. The first computer is constantly updating data values and sending them to the other computer, and I want that computer to be able to query the first one for the most recent values whenever it needs them. However, the default implementation of the UDP send and receive in MatLab is a FIFO structure- the first packet I send is the first the other computer receives when they execute the "fscanf" function. I want the last packet I sent to be the one the fscanf function returns. Is this possible or do I need to use a different protocol?

    Read the article

  • Selecting an element based on class and id in jquery - similar to an SQL query

    - by Ankur
    I want to select an element based on it's class and id, I have seen many similar questions on SO. Most of the users ask why would you ever want to do this - which is not very helpful, trust me, this is the simplest way of solving my UI problem, and it's a very unique and intereting UI related to making generic triple stores easily browsable. At the moment the jQUery looks like this: $(document).ready( function() { $(".predicates").hide(); $(".objects").hide(); $("#subject").click( function() { $("#predId, .predicates").toggle(); // this line } ); $("#predId").click( function() { $("#objId, .objects").toggle(); } ); }); The line I am really interested in is this $("#predId, .predicates").toggle(); how do I get the select to ensure that both #predId and .predicates are true, at the moment it seems that only one or the other has to be true. Is there something like an && operator?

    Read the article

  • Focus element inside iframe when iframe attached to Jquery Dialog

    - by huzzy143
    Hi, I have a iFrame which i load into jquery dialog. I want to focus an element inside the iFrame whenever the Jquery Dialog is being opened. Here is the code i am using to attach iframe to Dialog. $("<div id=\"srch" + options.winId + "\" title=\"" + options.windowTitle + "\" style=\"padding-left:0px;padding-right:0px;padding-top:0px\" tabindex=\"-1\"><iframe src=\"" + url + "\" id=\"frame" + options.winId + "\" name=\"frame" + options.winId + "\" height=\"100%\" width=\"100%\" frameborder=\"0\" marginheight=\"0\" marginwidth=\"0\" tabindex=\"-1\"></div>").appendTo("body") //Now initialize a Dialog Window $('#srch' + options.winId).dialog({ autoOpen: (options.searchText == '') ? true : false, height: options.height, width: options.width, modal: options.isModal, closeOnEscape: true, open: function () { }, close: function () { $('#srch' + options.winId).remove(); } }); I have written this code inside the page which isopened through iFrame src. $(document).ready(function () { $('input1').focus().select(); }); How can i achieve this? Thanks, Huzefa

    Read the article

  • Problems with listening an event in child object in Actionscript

    - by Raigomaru
    I have two classes. The first one (the starting class): package { import flash.display.Sprite; import flash.events.KeyboardEvent; import tetris.*; public class TetrisGame extends Sprite { private var _gameWell:Well; public function TetrisGame() { _gameWell = new Well(); addChild(_gameWell); } } } The second: package tetris { import flash.display.Sprite; import flash.events.KeyboardEvent; public class Well extends Sprite { public function Well() { super(); addEventListener(KeyboardEvent.KEY_DOWN, onKeyboard); } private function onKeyboard(event:KeyboardEvent):void { //some code is here } } } But when I press any buttons on my keyboard, the child class Well doesn't have any reaction. What's the problem?

    Read the article

  • C# Socket Server

    - by Snoopy
    In .NET 3.5 a new socket classes was released: http://msdn.microsoft.com/en-us/library/bb968780.aspx i found a sample but some questions regarding best practicses are remaining: http://code.msdn.microsoft.com/nclsamples/Wiki/View.aspx?title=Socket%20Performance m_numConnections (the maximum number of connections the sample is designed to handle simultaneously) is probably equal to the amount of cpu cores i have. m_receiveBufferSize is the size for one packet? like 8kb? how should i handle a length byte? opsToPreAlloc i dont understand. is this if i code a transparent proxy? Regarding the multithreading, what should be used? The reactive extension seem to be a good choice. Has anyone tried this in a real world project? Are there better options? I had bad experiences with the .NET thread pool in the past.

    Read the article

  • php - feof error

    - by TwixxyKit
    The file that I'm trying to read is a pgp-encrypted file. This is part of the process to decrypt it and I'm actually attempting to read the contents into a string so that I can then decrypt it . I'm not sure if that's the core problem here or not, but I'm getting an error: Warning: feof(): supplied argument is not a valid stream resource Here's the file code: if($handle = opendir($dir)) { while( false !== ($file = readdir($handle))) { if($file != "." && $file != "..") { $fhandle = fopen($file, "r"); $encrypted = ''; $filename = explode('.',$file); while(!feof($fhandle)) { $encrypted .= fread($fhandle, filesize($file)); } fclose($fhandle); $decrypted = $filename[0].'.txt'; shell_exec("echo $passphrase | $gpg --passphrase-fd 0 -o $decrypted -d $encrypted"); } } }

    Read the article

  • jquery bind click event

    - by Adem
    I am having a problem with my code if (text.length < 1) { args.IsValid = false; $('#<% = cmdSaveRequest.ClientID()> %>').removeAttr('click'()); } else { $('#<% = cmdSaveRequest.ClientID()> %>').click(savingData()); args.IsValid = true; } when I assign click event like $('#<% = cmdSaveRequest.ClientID() %').click(savingData()); it executes the saving data function Is there any way to bind the click event to button but whiteout executing the function just bind it and after user clicks the button then the function executes?

    Read the article

  • Using Entity Framework, how do I specify a sort on a navagation property?

    - by Jared
    I have two tables: [Category], [Item]. They are connected by a join table: [CategoryAndItem]. It has two primary key fields: [CategoryKey], [ItemKey]. Foreign keys exist appropriately and Entity has no problem pulling this in and creating the correct navigation properties that connect the entity objects. Basically each category can have multiple items, and items can be in multiple categories. The problem is that the order of items is specified per category, so that a particular item might be third in one category but fifth in another. In the past, I have added a [Sequence] field to the join table and modified the stored procedure to handle it. But since Entity is replacing my stored procedures, I need to figure out how to make Entity handle the sequence. Any suggestions?

    Read the article

  • Facebook - using an external flash application to connect via PHP

    - by Anonymous
    So, I have this application that needs to connect to facebook. It uses php for all of its data access, in older examples of the facebook API, i see people get the UID, and sessionkey from the iframe page, then send them to php and run a function called $facebook-setUser($UID, $sessionKey). This is how the majority of the tutorials online are doing it. That would be great, except the newest facebook API doesn't have any function like that. I have been scouring the web for 2 hours and have found nothing relating to the disappearance of this seemingly critical function. So, I have a flash application that needs to authenticate via a stateless php resource. I would love it if my PHP code could be completely uncaring if the request originated from flash, or iphone, or another application altogether-it should just need userId and and sessionKey. Is this still possible? Thank you in advance for your help! :)

    Read the article

  • XMLHttpRequest inside an oject: how to keep the refrence to "this"

    - by Julien
    I make some Ajax calls from inside a javascript object.: myObject.prototye = { ajax: function() { this.foo = 1; var req = new XMLHttpRequest(); req.open('GET', url, true); req.onreadystatechange = function (aEvt) { if (req.readyState == 4) { if(req.status == 200) { alert(this.foo); // reference to this is lost } } } }; Inside the onreadystatechange function, this does not refer to the main obecjt anymore, so I don't have access to this.foo. Ho can I keep the reference to the main object inside XMLHttpRequest events?

    Read the article

  • Jquery live not working in IE

    - by Kaskade
    Hi, I have some code that works fine in FF but not in IE. I have read other posts saying that the Jquery live method does not support change events but I am using a click event. Here is my code, it is inside $(document).ready(function(): $("a").live("click", function(e) { alert("link clicked"); //do stuff }); If FF the alert is fired but not in IE. When I use $("a").click it works fine, the problem is that I need to the function to be applied to links that do not exist when the page is first loaded (they will be created via ajax calls at a later stage). Do I have any options here. We are using jquery-1.4.1.min.js. Thanks in advance

    Read the article

  • jquery change load get url

    - by john morris
    Ok so I have a php page with data dynamically outputs depending on a $_GET variable ['file']. I have another page (index.php) which has a jQuery script that uses the load() function to load the php page. I have a list of links and when you click on one, it needs to change the $_GET variable to load, then refresh the load() jQuery variable. Heres a snippet: $("#remote-files").load("data.php?file=wat.txt"); $(".link1").mousedown(function() { $("#remote-files").load("data.php?file=link1.txt"); }); As you can see it loads the data into a div with the ID of remote-files. Is there a better way to do this, like update the page with the new get variable instead of redefining a new load function?

    Read the article

  • How do I recover from an unchecked exception?

    - by erickson
    Unchecked exceptions are alright if you want to handle every failure the same way, for example by logging it and skipping to the next request, displaying a message to the user and handling the next event, etc. If this is my use case, all I have to do is catch some general exception type at a high level in my system, and handle everything the same way. But I want to recover from specific problems, and I'm not sure the best way to approach it with unchecked exceptions. Here is a concrete example. Suppose I have a web application, built using Struts2 and Hibernate. If an exception bubbles up to my "action", I log it, and display a pretty apology to the user. But one of the functions of my web application is creating new user accounts, that require a unique user name. If a user picks a name that already exists, Hibernate throws an org.hibernate.exception.ConstraintViolationException (an unchecked exception) down in the guts of my system. I'd really like to recover from this particular problem by asking the user to choose another user name, rather than giving them the same "we logged your problem but for now you're hosed" message. Here are a few points to consider: There a lot of people creating accounts simultaneously. I don't want to lock the whole user table between a "SELECT" to see if the name exists and an "INSERT" if it doesn't. In the case of relational databases, there might be some tricks to work around this, but what I'm really interested in is the general case where pre-checking for an exception won't work because of a fundamental race condition. Same thing could apply to looking for a file on the file system, etc. Given my CTO's propensity for drive-by management induced by reading technology columns in "Inc.", I need a layer of indirection around the persistence mechanism so that I can throw out Hibernate and use Kodo, or whatever, without changing anything except the lowest layer of persistence code. As a matter of fact, there are several such layers of abstraction in my system. How can I prevent them from leaking in spite of unchecked exceptions? One of the declaimed weaknesses of checked exceptions is having to "handle" them in every call on the stack—either by declaring that a calling method throws them, or by catching them and handling them. Handling them often means wrapping them in another checked exception of a type appropriate to the level of abstraction. So, for example, in checked-exception land, a file-system–based implementation of my UserRegistry might catch IOException, while a database implementation would catch SQLException, but both would throw a UserNotFoundException that hides the underlying implementation. How do I take advantage of unchecked exceptions, sparing myself of the burden of this wrapping at each layer, without leaking implementation details?

    Read the article

  • Numpy modify array in place?

    - by User
    I have the following code which is attempting to normalize the values of an m x n array (It will be used as input to a neural network, where m is the number of training examples and n is the number of features). However, when I inspect the array in the interpreter after the script runs, I see that the values are not normalized; that is, they still have the original values. I guess this is because the assignment to the array variable inside the function is only seen within the function. How can I do this normalization in place? Or do I have to return a new array from the normalize function? import numpy def normalize(array, imin = -1, imax = 1): """I = Imin + (Imax-Imin)*(D-Dmin)/(Dmax-Dmin)""" dmin = array.min() dmax = array.max() array = imin + (imax - imin)*(array - dmin)/(dmax - dmin) print array[0] def main(): array = numpy.loadtxt('test.csv', delimiter=',', skiprows=1) for column in array.T: normalize(column) return array if __name__ == "__main__": a = main()

    Read the article

  • Compile a shared library statically

    - by Simon Walker
    I've got a shared library with some homemade functions, which I compile into my other programs, but I have to link the end program with all the libraries I have used to compile the static library. Here is an example: I have function foo in the library which requires a function from another library libbar.so. In my main program to use function foo I have to compile it with the -lbar flag. Is there a way I can compile my library statically so it includes all the required code from the other libraries, and I can compile my end program without needing the -lbar flag? Cheers

    Read the article

  • Help porting a bit of Prototype JavaScript to jQuery

    - by ewall
    I have already implemented some AJAX pagination in my Rails app by using the example code for the will_paginate plugin--which is apparently using Prototype. But if I wanted to switch to using jQuery for future additions, I really don't want to have the Prototype stuff sitting around too (yes, I know it's possible). I haven't written a lick of JavaScript in years, let alone looked into Prototype and jQuery... so I could use some help converting this bit into jQuery-compatible syntax: document.observe("dom:loaded", function() { // the element in which we will observe all clicks and capture // ones originating from pagination links var container = $(document.body) if (container) { var img = new Image img.src = '/images/spinner.gif' function createSpinner() { return new Element('img', { src: img.src, 'class': 'spinner' }) } container.observe('click', function(e) { var el = e.element() if (el.match('.pagination a')) { el.up('.pagination').insert(createSpinner()) new Ajax.Request(el.href, { method: 'get' }) e.stop() } }) } }) Thanks in advance!

    Read the article

  • JQuery: Get length of JSON reply?

    - by Rosarch
    In a JQuery getJSON call, how can I tell the length of the JSON that's returned? function refreshRoomList() { $.getJSON('API/list_rooms', function (rooms) { if (rooms.length > 0) { $("#existing-room-list").empty(); $("#join-existing-room").text("Join existing room:"); // this shouldn't be here $.each(rooms, function (index, roomName) { var newChild = sprintf('<li><a href="room?key=%s">%s</a></li>', index, roomName); $("#existing-room-list").append(newChild); }); } else { $("#join-existing-room").text("No rooms found."); } }); } For some reason this doesn't work, but if I replace rooms.length > 0 with true, the full list of rooms is printed out.

    Read the article

  • Structuring System Architecture in a Flex Web Application on a Budget (w/o Java)

    - by phwd
    I started a project a while back using the following architecture from Adobe Developer Article talking about Creating marketing platforms in Flex. I did my first set of coding locally forgetting that my server did not handle Tomcat. So I said okay, and cut some corners and then some other limitation came up and I cut some more corners. Eventually for a good week or two, it was trying to get the project working with making the ends meet. Layers started to merge. In the end I used a PureMVC (Presentation/Client) - ZendAMF (Communication) - MySql (Data) Layout. It worked but I never felt as though I had some layer just to take care of all the SQL calls to the data.It just felt hacked together So should I keep the above setup and just start from the presentation layer and move downwards like they said in the article or is there a better layering (based on a hosting plan that does not handle Java) I could accomplish ? NOTE: I would just ask the adobe guys but they barely reply on their site. Thanks !

    Read the article

  • Making element draggable with Android WebView (ideally, just with Javascript) ?

    - by GJTorikian
    I'm building an app with a build target of 1.5 . I have a variable, WebView browser, that is calling loadUrl to load a static HTML page from my assets folder. In that HTML page, the following JavaScript is defined: var supportsTouch = ('createTouch' in document); ... var w = $('wrapper'); w[supportsTouch ? 'touchmove' : 'onmousemove'] = move; w[supportsTouch ? 'touchend' : 'onmouseup'] = function(event){ dragging = false; }; where move is another function that handles the dragging. Unfortunately, this doesn't seem to work. I cannot figure out a concise list of which touch events are available to Android--is it ontouchmove, or touchmove? Am I supposed to set up an onTouchEvent call back in my Java code, which then launches the JavaScript function?

    Read the article

  • Javascript (JQuery) keyboard hijack problem

    - by user266564
    I'm making a typing tutor program using javascript. Everything is going well except that if activates browser hotkeys which disrupts the functionality of the program. When I press the single quote in Firefox it triggers "Quick find (links only)" short cut and in all browsers when I press space the page scrolls down a page. Everything is working fine outside of this. Here's the code in the head: <script type="text/javascript"> $(document).ready(function() { executeType(); }); </script> And the code I am using to capture the keyboard (simplified, but tested): function executeType() { $(document).keydown(function(event) { alert(event.keyCode); }); }

    Read the article

  • Is it possible that __doPostBack() would ever send a GET request?

    - by Galilyou
    I'm having a problem with telerik RadGrid, I want to enable multiple row selection. I also want to go to the server whenever a row is selected or deselected. I created a javascript function to handle the Grid's client side events (OnRowSelected, and OnRowDeSelected). The functions look like this: function onOperationRowSelected(sender, eventArgs) { __doPostBack("<%=myControl.ClientID %>", "rowSelected:" + eventArgs.get_itemIndexHierarchical()); } The other function is very similar, the only difference is that it sends the string "rowDeselcted" instead of "rowSelected". On Page_Load I check to see if the request is a Post request using "IsPostBack" and if so, I check to see if it's a rowSelected or rowdeselected. My problem is when I select a first raw on my grid, a Post request happens (which is expected), however, when I select the second row, a GET request is issued, which (obviously) will result in IsPostBack returning false. What am I missing here?

    Read the article

  • adding new Input to jquery validationEngine form?

    - by Hailwood
    I have some fairly complex ajax logic etc going on in the onValidationComplete function for a form with jQuery Validation Engine. This is working perfect, but one thing is bothering me. in the form I have the ability to dynamically add inputs (add new row button). so my code structure wise looks like: var form = $('#myForm'); form.validationEngine('attach', {onValidationComplete:validationComplete}); $('#newInput').on('click', function(){ form.append('<input />'); form.validationEngine('detach'); form.validationEngine('attach', {onValidationComplete:validationComplete}); }); function validationComplete(form, status){/*all my logic here*/} What I don't like about it is that every time I add a new input I have to detach and then re-attach the validationEngine. Is there any way to just tell it to add the new input to it's list of inputs to validate?

    Read the article

  • Why is lua crashing after extracting zip files?

    - by Brian T Hannan
    I have the following code but it crashes every time it reaches the end of the function, but it successfully extracts all the files and puts them in the right location. require "zip" function ExtractZipAndCopyFiles(zipPath, zipFilename, destinationPath) local zfile, err = zip.open(zipPath .. zipFilename) -- iterate through each file insize the zip file for file in zfile:files() do local currFile, err = zfile:open(file.filename) local currFileContents = currFile:read("*a") -- read entire contents of current file local hBinaryOutput = io.open(destinationPath .. file.filename, "wb") -- write current file inside zip to a file outside zip if(hBinaryOutput)then hBinaryOutput:write(currFileContents) hBinaryOutput:close() end end zfile:close() end -- call the function ExtractZipAndCopyFiles("C:\\Users\\bhannan\\Desktop\\LUA\\", "example.zip", "C:\\Users\\bhannan\\Desktop\\ZipExtractionOutput\\") Why does it crash every time it reaches the end?

    Read the article

< Previous Page | 484 485 486 487 488 489 490 491 492 493 494 495  | Next Page >