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  • When do you need to use a view controller?

    - by BeachRunnerJoe
    I'm diving into iPhone development and one of the core concepts im trying to get my head around is view controllers. If you look at the GLPaint example on the apple dev site, you'll see a project that has... An app delegate class A uiwindow subclass And a uiview subclass And the uiview subclass implements all the core graphics painting logic and handles the touch events. My questions are, why is there no view controller implemented to handle that view logic? Could you use a view controller to implement that logic or does it have to be implemented in the uiview subclass? And last, when should you use a view controller to implement the view logic code? Thanks so much in advance for your help!

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  • When parsing XML with jquery, how can we pass the current node from within each() to another functio

    - by Johusa
    Say we have an XML document with many book nodes... When parsing XML with jquery, how can i pass the current node from each() iteration to another function that will do some stuff until something is reached and then go back to the previous function (passing along the current node from this function back to the first function)? Here something more descriptive (this is just an example out of my head, not accurate): function MyParser(x1,x2,dom) { // if i am called by anotherFunction(thisNode) proceed from the passed node dom.find('book').each(function() { var Letter = thisNode.find(author).charAt(0); if(x1 == Letter) { // print everything till the next letter (x2) anotherFunction(thisNode) } } } function anotherFunction(x2,thisNode) { //continue parsing here until you reached x2 //when x2 is reached, return to previous function passing again the current node }

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  • Why don't hardware failures show up at the programming language level?

    - by Julian Cienfuegos
    I am wondering if anyone can give my a good answer, or at least point me in the direction of a good reference to the following question: How come I have never heard of a computer breaking in a very fundamental way? How come when I declare x to be a double it stays as a double? How come there is never a short circuit that robs it of some bytes and makes it an integer? Why do we have faith that when we initialize x to 10, there will never be a power surge that will cause it to become 11, or something similar? I think I need a better understanding of memory. Thanks, and please don't bash me over the head for such a simple/abstract question.

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  • SQL - logical AND among multiple rows

    - by potrnd
    Hello, First of all sorry that I could not think of a more descriptive title. What I want to do is the following using only SQL: I have some lists of strings, list1, list2 and list3. I have a dataset that contains two interesting columns, A and B. Column A contains a TransactionID and column B contains an ItemID. Naturally, there can be multiple rows that share the same TransactionIDs. I need to catch those transactions that have at least one item ID that exists whithin each list (list1, list2 AND list3). I also need to count how many times does that happen for each transaction. I hope that makes enough sense, perhaps I will be able to explain it better with a clear head. Thanks in advance

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  • Best Book for a new Database Developer

    - by John
    We have just had a graduate join the team with the end aim of assisting out our very busy DBA. He has only a basic SQL knowledge from his degree so we are looking for a really good getting started book preferably based on MS SQL server. Purchase Update: Thanks to the replies we have now purchased Head First SQL to review what he already knows and Beginning SQL Server 2005 Programming to enhance these skills. Further down the page you can see my full review of the books for our needs. However still feel free to post more books as others may find them useful!

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  • Output of Iterable.sliding as Tuple

    - by ziggystar
    The method sliding on collections returns a sliding window of given size in the form of X[Iterable[A]] with X being the type of the collection and A the element type. Often I need two or three elements and I prefer to have them named. One ugly workaround for sliding(2) is the following: points.sliding(2).foreach{ twoPoints => val (p1,p2) = (twoPoints.head,twoPoints.last) //do something } This sucks and only works for two elements. Also note that (a,b) = (twoPoints(0),twoPoints(1)) doesn't work. Help me!

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  • Javascript: adding methods using prototype descriptor

    - by LDK
    Sorter.prototype.init_bubblesort = function(){ console.log(this.rect_array); this.end = this.rect_array.length; this.bubblesort(); } Sorter.prototype.init = function(array,sort_type){ this.rect_array = array; this.init_bubblesort(); } The code above works as expected, but when I change the init function to: Sorter.prototype.init = function(array,sort_type){ var sort_types = {'bubblesort':this.init_bubblesort, 'quicksort':this.init_quicksort, 'liamsort':this.init_liamsort}; this.rect_array = array; sort_types[sort_type](); } the init_bubblesort function results in an error saying this.rect_array is undefined. I'm trying to wrap my head around why init_bubblesort no longer as access to it's instance's variables.

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  • EF Linq Product Sum when no records returned

    - by user1622713
    I’ve seen variations of this question all over the place but none of the answers work for me. Most of them are just trying to sum a single column too – nothing more complex such as the sum of a product as below: public double Total { get { return _Context.Sales.Where(t => t.Quantity > 0) .DefaultIfEmpty() .Sum(t => t.Quantity * t.Price); } } If no rows are returned I want to return zero. However if no rows are returned the .Sum() fails. There are various options of trying to insert Convert.ToDouble and using null coalesce operators, but they all still gave me errors. I’m sure I am missing a simple way to do this – any help greatly appreciated after too long banging head against google brick wall!

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  • Can I insert a style tag and contents from a view with CakePHP?

    - by Richard
    From what I can see, CakePHP makes it easy to link to a CSS file in a view with the following: echo $html->css('my-css-filename',null,array(),FALSE); But what if I don't want to exclusively use hardcoded files? How can I get it to create a style tag with some dynamically generated rules in e.g. <style type="text/css" media="all">p {font-size:1.5em}</style> I am trying to do this in a view file, I'd like the CSS to be placed in the head tag, and I'm using CakePHP 1.2.7

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  • How do I convert german dates to MySQL standard dates?

    - by Kebman
    I'm importing a CSV file with dotted german dates into a MySQL database. I want the dates in the CSV to automatically be formatted correctly to the correct data type fields used by MySQL. I'm using Sequel Pro for the import. I gather I'm supposed to use the STR_TO_DATE function, but I just can't wrap my head around how to use add value or expression. German date Here are the dates in the CSV file: DD.MM.YYYY e.g.: 28.01.1978 MySQL date Here is what I want to end up with in the database: YYYY-MM-DD e.g.: 1978-01-28 Any ideas?

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  • Having trouble with Flash, Javascript and JQuery

    - by andypants
    I'm using JQuery with the JQuery flash plugin (http://jquery.lukelutman.com/plugins/flash/) and trying to send a JS call back to the flash, I keep running into "xxx is not a function" so apparently something is off. I'm new to JQuery and very new to this jquery flash plugin and just can't quite wrap my head around what I am doing wrong. Here's where I'm lading up the flash: <div id="tagimgback"> <script language="javascript"> $(document).ready(function(){ $('#tagflash').flash( { src: 'tagflash', width: 200, height: 200, flashvars: {theYear:'2010',theTagNumber:'123'} }, { version: 8 } ); }); </script> </div> And here's where I'm trying to call it: $("#tagflash").gotoNewFrame(theTagNumber); gotoNewFrame is an AS function within my flash. I know the function works as I've been able to test it prior to bringing jQuery into the mix.

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  • Redirect to hash URL

    - by r1987
    I'm building a site with a hashchange on wordpress, all working good. It just loads a single.php template file into a div. The problem is that i can still access my single url (http://www.mydomain.com/my-single-post). Since its not having any head and style tags with it, i don't want people to go over there. Also google has picked up the direct links, because I use the href attribute to load content into the div. So my question is: If someone clicks a link lets say in a forum, http://www.mydomain.com/my-single-post , is it possible to redirect him instantly to http://www.mydomain.com/#my-single-post ? I have researched that it has something to do with .htaccess, but I also have Pages, where i don't want the hash infront of the page-name.

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  • Selecting the image after execCommand

    - by jerebear
    Have been banging my head against the wall on this one for a while now. I have an editor that is inserting an image but I can't get it to select the newly inserted image in Firefox after execCommand Runs. Here's my code. var editor = this; var sel = editor._getSelection(); var range = editor._createRange(sel); editor._doc.execCommand("insertimage", false, imgURL); img = range.startContainer.previousSibling; console.log(img);

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  • Limit output of all Linux commands

    - by daniel
    I'm looking for a way to limit the amount of output produced by all command line programs in Linux, and preferably tell me when it is limited. I'm working over a server which has a lag on the display. Occasionally I will accidentally run a command which outputs a large amount of text to the terminal, such as cat on a large file or ls on a directory with many files. I then have to wait a while for all the output to be printed to the terminal. So is there a way to automatically pipe all output into a command like head or wc to prevent too much output having to be printed to terminal?

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  • how to format (css) data loaded with $.load or $.get or $.ajax?

    - by user356981
    I need to load a piece of content html when an link in a menu is clicked; once loaded, the css format is not working properly, how do I re-format (re-styling via css) the loaded code? My code is: $('a', mainMenu).click(function() { ref = this.href; $('#content').load(ref + ' #content' function() { url = '../css/jquery-ui-1.8.2.custom.css'; //styling here if (document.createStyleSheet) document.createStyleSheet(url); else $('<link rel="stylesheet" type="text/css" href="'+url+'"/>').appendTo('head'); }); }) is it another way to load and re-style html (plugins perhaps)? thanks in adv'n.

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  • Help in restructuring a project

    - by mrblah
    I have a commerce application, asp.net mvc. I want it to be extensible in the sense others can create other payment providers, as long as they adhere to the interfaces. /blah.core /blah.web /blah.Authorize.net (Implementation of a payment provider using interfaces Ipaymentconfig and paymentdata class) Now the problem is this: /blah.core - PaymentData /blah.core.interfaces - IPaymentConfig where Payment Data looks like: using blah.core; public class PaymentData { public Order Order {get;set;} } IPayment data contains classes from blah.core like the Order class. Now I want to use the actual Authorize.net implementation, so when I tried to reference it in the blah.core project I got a circular dependency error. How could I solve this problem? Many have said to break out the interfaces into their own project, but the problem is PaymentData references entities that are found in blah.core also, so there doesn't seem to be a way around this (in my head anyhow). How can I redesign this?

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  • Get div and the correct close tag preg

    - by Barkermn01
    hi all, Now preg has always been a tool to me that i like but i cant figure out for the life if me if what i want to do is possible let and how to do it is going over my head What i want is preg_match to be able to return me a div's innerHTML the problem is the div im tring to read has more divs in it and my preg keeps closing on the first tag it find Here is my Actual code $scrape_address = "http://isohunt.com/torrent_details/133831593/98e034bd6382e0f4ecaa9fe2b5eac01614edc3c6?tab=summary"; $ch = curl_init($scrape_address); curl_setopt ($ch, CURLOPT_RETURNTRANSFER, '1'); curl_setopt($ch, CURLOPT_HEADER, 0); curl_setopt($ch, CURLOPT_ENCODING, ""); $data = curl_exec($ch); preg_match('% <div id="torrent_details">(.*)</div> %six', $data, $match); print_r($match); This has been updated for TomcatExodus's help Live at :: http://megatorrentz.com/beta/details.php?hash=98e034bd6382e0f4ecaa9fe2b5eac01614edc3c6

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  • File folder sql programming

    - by eski
    I'm trying to figure out the best way to make a file folder system in sql. I'm making a website that will be using similar system as explorer in windows. You open your c: drive and you see there some folders and files, and you open one folder and you see more files and folders there. So what i'm asking, would i use one table for this and just point to the parent id number or what ? I have this in my head.. You make a Primary folder, it gets the u_id=1. Then i make a file in that folder, it gets u_id=2 and p_id=1 so i know its there right? same with the folders. This would all be in one table but i cant help thinking there is some major flaw in this..

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  • Weird "?>" being displayed

    - by Jaxkr
    I have the following navigation bar script: <?php session_start(); require('includepath.inc.php'); require($include_path.'loginsysfunc.inc.php'); $current_page = $_SERVER['REQUEST_URI']; ?> <div class="navbar"> <img class="navlogo" src="logo.png"> <div class="navbutton"><a href="index.php">Home</a></div> <div class="navbutton"><a href="about.php">About</a></div> <div class="navbutton"><a href="donate.php">Donate</a></div> <?php if (loggedIn()){ ?> <div class="navusername"><a href="profile.php?user=<?php echo $_SESSION['username'];?>"><?php echo $_SESSION['username']; ?></a></div> <div class="navtoolsettings"><a href="settings.php">Settings</a></div> <div class="navtoollogout"><a href="logout.php">Log out</a> <?php } elseif ($current_page == '/login.php') { ?> <div class="navregister"><a href="register.php">Register</a></div> <?php } else { ?> <div class="navusername"><a href="login.php">Log in</a></div> <?php } ?> </div> For some reason, a strange "?" is being displayed. I am super confused, so please help. Here is includepath.inc.php (the only I reason it's there is because I am on a shared host, and I don't want to type '/home/bigdumbhash/public_html/include' everytime. But, here it is: <?php $include_path = '/home/a6595899/public_html/include/'; ?> Here is loginsysfunc.inc.php. These are functions that go with my login system to save time: <?php function valUser() { session_regenerate_id(); $_SESSION['valid'] = true; $_SESSION['username'] = $userid; echo '<meta http-equiv="refresh" content="0;URL=\'index.php\'">'; } function loggedIn() { if($_SESSION['valid'] == true) { return true; } else { return false; } } function createSalt() { $string = $string = md5(uniqid(rand(), true)); return substr($string, 0, 3); } function logout() { $_SESSION = array(); session_destroy(); echo '<meta http-equiv="refresh" content="0;URL=\'index.php\'">'; } ?> Here is the actual HTML of the page: <!DOCTYPE html> <html> <head> <link href="style.css" rel="stylesheet" type="text/css"> <title> Log in </title> </head> <body> <div class="navbar"> <img class="navlogo" src="logo.png"> <div class="navbutton"><a href="index.php">Home</a></div> <div class="navbutton"><a href="about.php">About</a></div> <div class="navbutton"><a href="donate.php">Donate</a></div> <div class="navregister"><a href="register.php">Register</a></div> </div> ?> <div class="loginbox"> <h1>Log in</h1> <form action="logingo.php" method="POST"> <input class="userpass" type="text" name="username" value="Username" onFocus="this.value='';"> <br> <input class="userpass" type="password" name="password" value="Password" onFocus="this.value='';"> <br> <input class="loginbutton" type="submit" value="Log in!"> </form> </div> </body> </html>

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  • How can I determine if a specified string is in a specific MySQL column? (and also perhaps a tutoria

    - by Rob
    This is a fairly simple question. Basically, I'm having a program send HardWare ID's to my PHP script as GET data. I need the PHP script check to make sure that HardWare ID is in a specific MySQL column, and if it is, { continue the script, } else { exit(); } Problem is I'm not too good with MySQL and have no idea how to do this. However, I feel that I should know this by now, so if someone could also link me to a good tutorial site for MySQL, that kind of keeps it "humanized" if you know what I mean. One that "dumbs it down." I'm not dumb or anything, I just get sidetracked easily, and if all its doing is showing me code and not explaining it, I won't pick it up. If you don't have any tutorial sites off the top of your head, I'll settle for help with the first question, and try to hunt down a tutorial later.

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  • Comparing Java enum members: == or equals() ?

    - by Bears will eat you
    I know that Java enums are compiled to classes with private constructors and a bunch of public static members. When comparing two members of a given enum, I've always used .equals(), e.g. public useEnums(SomeEnum a) { if(a.equals(SomeEnum.SOME_ENUM_VALUE)) { ... } ... } However, I just came across come code that uses the equals operator == instead: public useEnums2(SomeEnum a) { if(a == SomeEnum.SOME_ENUM_VALUE) { ... } ... } I've been programming in Java for 5+ years, and I thought I understood difference between the two - but I'm still scratching my head at which one is more correct. Which operator is the one I should be using?

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  • What is the right way to modify a wordpress query in a plugin?

    - by starepod
    Basically i am playing with a plugin that allows future-dated posts on archive pages. My question is broader than this specific functionality, but everyone likes some context. I have my head around many of the plugin development concepts, but must be missing something very basic. I can successfully rewrite a query that gives me the results i want like this: function modify_where( $where ) { global $wp_query; // define $year, $cat, etc if( is_archive() ) { $where = " AND YEAR(wp_posts.post_date)='".$year."' AND wp_term_taxonomy.taxonomy = 'category' AND wp_term_taxonomy.term_id IN ('".$cat."') AND wp_posts.post_type = 'post' AND (wp_posts.post_status = 'publish' OR wp_posts.post_status = 'future')"; } return $where; } add_filter('posts_where', 'catCal_where' ); However, if i attempt to create a new WP_Query('different_query_stuff') after the main loop the new query uses the same WHERE statement outlined above. The question is : What am I missing? Thanks.

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  • Cant handle it (jQuery hanlder understanding needed)

    - by chainwork
    I'm embarrassed to even ask BUT could someone help me understand what a "handler" is. I am new to jQuery and the API constantly has references similar to the following: toggle( handler(eventObject), handler(eventObject), [ handler(eventObject) ] ) I scratch my head and say to myself "what the hell is a handler". Then I check my 2 jquery books and don't really see anything specific there. I get what an event handler does, it handles an event. But the word handler in the above context confuses me including "eventObject". I tried to google it but could not really find a really clear definition of what exactly a handler is as it relates to jquery. Thanks for your help =]

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  • C# IndexOutOfRange issue, probably simple.

    - by MWC
    Banging my head off the wall due to this. I'm getting the error at cell[rcell] = repack[counter] even though I have 190 items in the repack array. private string csvtogrid(string input) { input = input.Replace("\r", ",").Substring(2).TrimEnd(',').Trim().Replace("\n", ",").Replace(",,,", ",").Replace(",,",","); string[] repack = input.Split(','); string[] cell = { }; int rcell = 1; for (int counter = 1; counter < repack.Length; counter++) { if (rcell < 4) { cell[rcell] = repack[counter]; rcell++; } procgrid.Rows.Add(cell[1], cell[2], cell[3]); rcell = 1; } richTextBox1.Text = input; return null; }

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  • C - How to manipulate typedef structure pointer?

    - by AbhishekJoshi
    typedef struct { int id; char* first; char* last; }* person; person* people; Hi. How can I use this above, all set globally, to fill people with different "person"s? I am having issues wrapping my head regarding the typedef struct pointer. I am aware pointers are like arrays, but I'm having issues getting this all together... I would like to keep the above code as is as well. Edit 1: char first should be char* first.

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