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  • Howto serialize a List<T> in Silverlight?

    - by Jurgen
    I have a struct called coordinate which is contained in a list in another class called segment. public struct Coordinate { public double Latitude { get; set; } public double Longtitude { get; set; } public double Altitude { get; set; } public DateTime Time { get; set; } } public class Segment { private List<Coordinate> coordinates; ... } I'd like to serialize the Segment class using the XmlSerializer using Silverlight (on Windows Phone 7). I understand from link text that XmlSerializer doesn't support List<T>. What is the advised way of serializing a resizable array coordinates? Thanks, Jurgen

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  • Can you help me think of problems for my programming language?

    - by I can't tell you my name.
    I've created an experimental toy programming language with a (now) working interpreter. It is turing-complete and has a pretty low-level instruction set. Even if everything takes four to six times more code and time than in PHP, Python or Ruby I still love programming all kinds of things in it. So I got the "basic" things that are written in many languages working: Hello World Input - Output Countdowns (not as easy as you think as there are no loops) Factorials Array emulation 99 Bottles of Beer (simple, wrong inflection) 99 Bottles of Beer (canonical) Conjatz conjecture Quine (that was a fun one!) Brainf*ck interpreter (To proof turing-completeness, made me happy) So I implemented all of the above examples because: They all used many different aspects of the language They are pretty interesting They don't take hours to write Now my problem is: I've run out of ideas! I don't find any more examples of what problems I could solve using my language. Do you have any programming problems which fit into some of the criteria above for me to work out?

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  • Zend Framework: How to include an OR statement in an SQL fetchAll()

    - by Scoobler
    I am trying to build the following SQL statement: SELECT users_table.*, users_data.first_name, users_data.last_name FROM users_table INNER JOIN users_data ON users_table.id = user_id WHERE (users_table.username LIKE '%sc%') OR (users_data.first_name LIKE '%sc%') OR (users_data.last_name LIKE '%sc%') I have the following code at the moment: public function findAllUsersLike($like) { $select = $this-select(Zend_Db_Table::SELECT_WITH_FROM_PART)-setIntegrityCheck(false); $select-where('users_table.username LIKE ?', '%'.$like.'%'); $select-where('users_data.first_name LIKE ?', '%'.$like.'%'); $select-where('users_data.last_name LIKE ?', '%'.$like.'%'); $select-join('users_data', 'users_table.id = user_id', array('first_name', 'last_name')); return $this-fetchAll($select); } This is close, but not right as it uses AND to add the extra WHERE statements, instead of OR. Is there any way to do this as one select? Or should I perform 3 selects and combine the results (alot more overhead?)? P.S. The parameter $like that is past is sanitized so don't need to wory about user input in the code above!

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  • How to decode numeric HTML entities in PHP

    - by Yuriy
    Hello, I'm trying to decode encoded long dash from numeric entity to string, but it seems that I can't find a function which can do this properly. The best that I found is mb_decode_numericentity(), however, for some reason it fails to decode long dash and some other special characters. $str = '–'; // <- ' & # 8211 ;' $str = mb_decode_numericentity ( $str , Array(0xFF, 0x2FFFF, 0, 0xFFFF) , 'ISO-8859-1'); This will return "?". Anyone knows how to solve this problem?

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  • Are stack based arrays possible in C#?

    - by Bob
    Let's say, hypothetically (read: I don't think I actually need this, but I am curious as the idea popped into my head), one wanted an array of memory set aside locally on the stack, not on the heap. For instance, something like this: private void someFunction() { int[20] stackArray; //C style; I know the size and it's set in stone } I'm guessing the answer is no. All I've been able to find is heap based arrays. If someone were to need this, would there be any workarounds? Is there any way to set aside a certain amount of sequential memory in a "value type" way? Or are structs with named parameters the only way (like the way the Matrix struct in XNA has 16 named parameters (M11-M44))?

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  • UITableView titleForHeaderInSection prints headers to console twice then crashes

    - by joec
    In the method below titleForHeaderInSection, for some reason the NSLog prints out the headers twice and then the app crashes in objc_msgSend. I can't understand why this would cause the app to crash? It would seem from research that crashes in objc_msgSend are caused by sending messages to already freed objects, but is that the case here? My sectionNames array is populated in viewDidLoad. - (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section { NSString *title = nil; title=[sectionNames objectAtIndex:section]; NSLog(title); return title; } Thanks

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  • I need to Split a string based on a complex delimiter

    - by Jason
    In C# I need to split a string (a log4j log file) into array elements based on a particular sequence of characters, namely "nnnn-nn-nn nn:nn:nn INFO". I'm currently splitting this log file up by newlines, which is fine except when the log statements themselves contain newlines. I don't control the input (the log file) so escaping them somehow is not an option. It seems like I should be able to use a comparator or a regex to identify the strings, but String.Split does not have an option like that. Am I stuck rolling my own, or is there a pattern or framework component that can be of help here?

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  • How do I write a custom validator for a zend form element with customized error messages?

    - by Mallika Iyer
    I have a question field with a list of allowed characters : A-Z,0-9,colon (:), question mark (?), comma(,), hyphen(-), apostrophe ('). I have the regex which works fine, in the fashion : $question->addValidator('regex', true, array(<regular expresstion>)) The default error message is something like ''' does not match against pattern '' I want to write a custom error message that says ' is not allowed in this field' Is there a simple way to do it using the existing zend components that I'm missing? Is writing a custom validator the only way to achieve what I'm trying to achieve? If yes, how do I write a custom validator (I looked at the documentation and didn't quite understand how I can customize the error messages) If there is any other way, I'd most appreciate that input too. Thanks for taking the time to answer this!

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  • Avoiding EXC_BAD_ACCESS when using the delegate pattern

    - by Kenny Winker
    A have a view controller, and it creates a "downloader" object, which has a reference to the view controller (as a delegate). The downloader calls back the view controller if it successfully downloads the item. This works fine as long as you stay on the view, but if you navigate away before the download is complete I get EXC_BAD_ACCESS. I understand why this is happening, but is there any way to check if an object is still allocated? I tried to test using delegate != nil, and [delegate respondsToSelector:], but it chokes. if (!self.delegate || ![self.delegate respondsToSelector:@selector(downloadComplete:)]) { // delegate is gone, go away quietly [self autorelease]; return; } else { // delegate is still around [self.delegate downloadComplete:result]; } I know I could, a) have the downloader objects retain the view controller b) keep an array of downloaders in the view controller, and set their delegate values to nil when I deallocate the view controller. But I wonder if there is an easier way, where I just test if the delegate address contains a valid object?

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  • Client side page permissions - Javascript / jquery / cookies / other?

    - by Ozaki
    TLDR Using plain HTML / Javascript. Want to block access to some pages (doesn't have to be super secure just to stop some peeking eyes). I thought of simply doing this by setting a cookie for each page they are allowed to visit with a value of true but thats a bit messy. Although it would work. Is there a way to set an array of values to a cookie so I can read the cookie and if a name of a page is in there then allow access with an IF statement or so on each of my pages. If they dont have the cookie just to replace my #content (entirepage) to "sorry no" etc. For example: $.cookie("Access","page1, page2, page3",{ expires: 1 }); Am already using JQuery, Jquery cookie. etc. I am up for anyway of doing this cookie idea is just an example So what do you think would be the best / most efficient way of managing this?

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  • Try-Catch-Throw in the same Java class

    - by Carlos
    Is it possible to catch a method in the current class the try-catch block is running on? for example: public static void arrayOutOfBoundsException(){ System.out.println("Array out of bounds"); } ..... public static void doingSomething(){ try { if(something[i] >= something_else); } catch (arrayOutOfBoundsException e) { System.out.println("Method Halted!, continuing doing the next thing"); } } If this is possible how will it be the correct way to call the catch method? If this is not possible, could anyone point me in the right direction, of how to stop an exception from halting my program execution in Java without having to create any new classes in the package, or fixing the code that produces ArrayOutOfBoundsException error. Thanks in Advance, A Java Rookie

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  • jQuery won't parse my JSON from AJAX query

    - by littlecharva
    Hi, I'm having difficulty parsing some JSON data returned from my server using jQuery.ajax() To perform the AJAX I'm using: $.ajax({ url: myUrl, cache: false, dataType: "json", success: function(data){ ... }, error: function(e, xhr){ ... } }); And if I return an array of items then it works fine: [ { title: "One", key: "1" }, { title: "Two", key: "2" } ] The success function is called and receives the correct object. However, when I'm trying to return a single object: { title: "One", key: "1" } The error function is called and xhr contains 'parsererror'. I've tried wrapping the JSON in parenthesis on the server before sending it down the wire, but it makes no difference. Yet if I paste the content into a string in Javascript and then use the eval() function, it evaluates it perfectly. Any ideas what I'm doing wrong? Anthony

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  • What does this rake db:seed error mean?

    - by Kenji Kina
    I've been trying to solve this problem for a couple of hours but I can't seem to understand what's going on. I'm using Rails 3 beta, and want to seed some data to the database. However, when I try to seed some values through db:seed, I get this error: rake aborted! Attribute(#81402440) expected, got Array(#69024170) The seeds.rb is: DataType.delete_all DataType.create( :name => 'String' ) And I got these classes: class DataType < ActiveRecord::Base has_many :attributes end class Attribute < ActiveRecord::Base belongs_to :data_types end While the migration definition for DataType is merely: class CreateDataTypes < ActiveRecord::Migration def self.up create_table :data_types do |t| t.string :name t.timestamps end end def self.down drop_table :data_types end end Can anyone tell me what I'm doing wrong?

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  • How do I include 2 tables in LocalStorage?

    - by Noor
    I've got a table that you can edit, and I've got a simple code saving that list when you're done with editing it. (the tables have the contenteditable on) The problem I've stumbled upon is that if I double click on enter, the table gets divided into two separate tables with the same ID. This causes the code I'm using to set the localStorage to only store one of the tables (I assume the first).. I've thought of different solutions and I wonder if someone could point out the pro's and con's (if the solutions even works that is). Make a loop that checks the page after tables and stores them into an array of localStorage-items.. I'd have to dynamically create a localStorage item for each table. Take the whole div that the tables are in, and store that in the localStorage, when a user revisits the page, the page checks after the items in storage and displays the whole divs. Any suggestions you have that can beat this :).. (but no cache, it has to be with the localStorage!) Thanks

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  • Zend RegEx Validator error message issue

    - by Mallika Iyer
    Hello, I'm validating a text field in my form as follows: $name = new Zend_Form_Element_Text('name'); $name->setLabel('First Name:') ->setRequired(true) ->addFilter(new Zend_Filter_StringTrim()) ->addValidator('regex',true,array('/^[(a-zA-Z0-9)]+$/')) ->addErrorMessage('Please enter a valid first name'); What I'm trying to accomplish is - how can i display a meaningful error message? Eg: If first name is 'XYZ-', how can i display '- is not allowed in first name.' Is there a way I can access what character the regex is failing for? Would you recommend something else altogether? I thought about writing a custom validator but the regex is pretty simple, so I don't see the point. I couldn't find a decent documentation for the zend 'regex' validator anywhere. If I don't override the default error message, I simple get something like : ';;;hhbhbhb' does not match against pattern '/^[(a-zA-Z0-9)]+$/' - which I obviously don't want to display to the user. I'd appreciate your inputs.

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  • Graphing new users by date with Seer

    - by Danger Angell
    I'd like to implement a rolling graph showing new users by day over the last 7 days using Seer. I've got Seer installed: http://www.idolhands.com/ruby-on-rails/gems-plugins-and-engines/graphing-for-ruby-on-rails-with-seer I'm struggling to get my brain around how to implement. I've got an array of the Users I want to plot: @users = User.all( :conditions = {:created_at = 7.days.ago..Time.zone.now}) Can't see the right way to implement the :data_method to roll them up by created_at date. Anyone done this or similar with Seer? Anyone smarter than me able to explain this after looking at the Seer sample page (linked above)?

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  • Efficiently check string for one of several hundred possible suffixes

    - by Ghostrider
    I need to write a C/C++ function that would quickly check if string ends with one of ~1000 predefined suffixes. Specifically the string is a hostname and I need to check if it belongs to one of several hundred predefined second-level domains. This function will be called a lot so it needs to be written as efficiently as possible. Bitwise hacks etc anything goes as long as it turns out fast. Set of suffixes is predetermined at compile-time and doesn't change. I am thinking of either implementing a variation of Rabin-Karp or write a tool that would generate a function with nested ifs and switches that would be custom tailored to specific set of suffixes. Since the application in question is 64-bit to speed up comparisons I could store suffixes of up to 8 bytes in length as const sorted array and do binary search within it. Are there any other reasonable options?

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  • Printing an NSDocument

    - by Brian Postow
    I'm trying to print a document. The document is an array of NSImageReps, or a single NSPDFImageRep, which has multiple pages. I'm having trouble figuring out how to use the NSPrintOperation class to print this. The NSPrintOperation seems to need an NSView to print. Do I need to manually add each image into the view at a calculated position and then let it do the pagination? that seems like it isn't in the spirit of Cocoa... is there some technique that I'm missing?

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  • OpenGL Motion blur with the accumulation buffer in WxWidgets

    - by Klaus
    Hello, I'm trying to achieve a motion blur effect in my OpenGL application. I read somewhere this solution, using the accumulation buffer: glAccum(GL_MULT, 0.90); glAccum(GL_ACCUM, 0.10); glAccum(GL_RETURN, 1.0); glFlush(); at the end of the render loop. But nothing happens... What am I missing ? Additions after genpfault answer: Indeed I did not asked for an accumulation buffer when I initialized my context. So I tried to pass an array of attributes to the constructor of my wxGLCanvas, as described here: http://docs.wxwidgets.org/2.6/wx_wxglcanvas.html : int attribList[]={ WX_GL_RGBA , WX_GL_DOUBLEBUFFER , WX_GL_MIN_ACCUM_RED, WX_GL_MIN_ACCUM_GREEN, WX_GL_MIN_ACCUM_BLUE, 0} But all I get is a friendly Seg fault. Does someone understand how to use this ? (no problems with int attribList[]={ WX_GL_RGBA , WX_GL_DOUBLEBUFFER , 0})

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  • Objective-C : Trouble with file download

    - by Holli
    I ran in a bit of trouble downloading files with Objective-C. I use the download decideDestinationWithSuggestedFilename from Apples documentation page. http://developer.apple.com/mac/library/documentation/cocoa/conceptual/URLLoadingSystem/Tasks/UsingNSURLDownload.html As long as I want to download just one file it works fine but I want to download an array for files one by one. The problem starts with the second file. Right now my code will trigger the next download itself from the downloadDidFinish Method. Then I will get an unrecognized selector sent to instance error. For me it looks like the NSURLDownload that just finished the download is still in use somehow. Release is called but the must be a problem. If I just put an NSBeep in the downloadDidFinished Method and trigger the next file download manually it works fine. Looks like I have to wait a while till I can start the next download. I know this question is a bit vague but maybe someone got an idea.

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  • How to combine mvc2 client side validation with other client side validation?

    - by Andrey
    I have a page using mvc2 with client side validation. The client side validation is provided by Microsoft Ajax mvc validation script. This does very well to validate all fields that are related to the model. I also have fields that are never sent to the server such as the confirm password value, and the accept agreement. For these fields i need pure client side validation. I created the javascript to do this, but am now having a hard time integrating the two validatiosn together. I was hoping that i could do something like add another error to an array, or set the page manually to not valid to make sure that the user cannot submit. Basically follow the same approach that i would with normal asp.net validation. I can't find anything like that. In all examples validators are discussed that are connected to parts of the model. What is my best approach here?

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  • Does JSON.js cause conflicts with Sys.Serialization.JavaScriptSerializer.serialize

    - by David Robbins
    I am using Telerik controls in my webforms and want to serialize object on the client. Since I am getting a stackoverflow error with Sys.Serialization.JavaScriptSerializer.deserialize I wanted to try JSON. With both JSON and and the MS library I get "Sys.Application is undefined." Has anyone encountered this what did you do as a work around? EDIT I am serializing my object on a parent page and passing them via an argument to a child window. The child window is in an IFRAME tag. The object can be used in the child page, but I receive the stackoverflow error when I serialize it. The object is an Array of objects.

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  • Writing JSON with XSLT

    - by JP
    Hi, I'm trying to write XSLT to transform a specific web page to JSON. The following code demonstrates how Ruby would do this conversion, but the XSLT doesn't generate valid JSON (there's one too many commas inside the array) - anyone know how to write XSLT to generate valid JSON? require 'rubygems' require 'nokogiri' require 'open-uri' doc = Nokogiri::HTML(open('http://bbc.co.uk/radio1/playlist')) xslt = Nokogiri::XSLT(DATA.read) puts out = xslt.transform(doc) # Now follows the XSLT __END__ <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns="http://www.w3.org/1999/xhtml"> <xsl:output method="text" encoding="UTF-8" media-type="text/plain"/> <xsl:template match="/"> [ <xsl:for-each select="//*[@id='playlist_a']//div[@class='artists_and_songs']//ul[@class='clearme']"> {'artist':'<xsl:value-of select="li[@class='artist']" />','track':'<xsl:value-of select="li[@class='song']" />'}, </xsl:for-each> ] </xsl:template> </xsl:stylesheet>

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  • What effects drawing charts/diagrams from $_SESSION data under php5, which worked under php4?

    - by ste_php
    Hello, I have a script generating 3 diagrams from $_SESSION variables which work fine under php4 with register_globals = off, but when I parse the same script as php5 I get no diagram. The diagrams a drawn from GD libary and it works, if I set the data into an Array (manually filled) within the script file. But I need a way to get it work on php5, without much changes. Are there any SESSION settings or php-settings which might interfere with my script. I already checked a lot of the php-settings (changing php.ini over and over again), but found nothing what brings me the diagrams back. Hopefully someone of you could kick me into the right direction. Any Ideas? Thanks a lot.

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  • Validate password on change of certain fields in RoR

    - by Micke
    Hello, I am building a RoR app, a community. With a User model and some fields. So when a user is updating a certain field, like His/Hers berthday. Then i want to validate that the User typed in the password that is the same in the Database. So I know that it is the right user trying to change the birthday. So i ask you how i can create shuch a validator. Allso i would like to be able to specify an array of which fields the user has to validate the password to change. Ps. I am using RoR3. If it mathers. Thanks, Micke

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