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  • how to create a particle system on iphone and retain the created particles?

    - by lukya
    Hi all, I need to create a particle system and retain the created particles. I need to shake / move the created particles with the iphone accelerometer. Also, the number of particles needs to be very high (I need to show sand!). I do not have any OpenGLES programming experience. After initial search, I found Cocos2D can be used for particle generation. But there is no way of retaining the particles in the CCParticle system. As a work around, I tried creating many sprites at the end of particle generation and shown them as particles. But moving few number of sprites with accelerometer drops the frame rate considerably. Please suggest how this can be achieved and whether I should look for some other framework or if some kind of similar demo code is available. Thanks, Swapnil

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  • Utilising cssText to set styles with JavaScript

    - by Rajat
    I was going through Nicholas Zakas presentation on JavaScript here : http://www.slideshare.net/nzakas/writing-efficient-javascript (slide number: 89/139) He recommends using cssText property whenever you are setting a bunch of styles through JavaScript. The best solution is obviously adding those styles to a class and then using JS to add the classname to an element.However, in many situations, We resort to just setting the properties directly within JS when the number of properties are low. It seems from his presentation that using cssText property would be more efficient in such scenarios.I tried to look up more on the property but couldn't find much information. Has anyone used the 'cssText' property ? It would be great to have some more technical info on how the property helps.

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  • Find missing birth days in Apple Addressbook

    - by Felix Ogg
    I am trying to clean the holes out of my Mac address book. As a first step I want to ask all my friends for their birth day, to be able to congratulate them with cheesy Hallmark cards. I need a "group" in my address book, to mailmerge personalized messages from. This is the Applescript I came up with: tell application "Address Book" make new group with properties {name:"No Birthday"} set birthdayPeople to (get every person whose birth date is greater than date "Monday, January 1, 1900 12:00:00 AM") repeat with i from 1 to number of items in people set thePerson to item i of people if not (birthdayPeople contains thePerson) then add thePerson to group "No Birthday" end if end repeat save end tell It breaks, but from the error messages I cannot deduce what is wrong: Result: error "Can’t make «class azf4» id \"05F770BA-7492-436B-9B58-E24F494702F8:ABPerson\" of application \"Address Book\" into type vector." number -1700 from «class azf4» id "05F770BA-7492-436B-9B58-E24F494702F8:ABPerson" to vector (BTW: Did I mention this is my first AppleScript code, EVER? So, if this code can be simplified, or made more elegant, that is welcome too.)

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  • Parsing data without HTML tags

    - by user296507
    Hi, I need to extract the actual phone number form the html listed below, but I'm not really sure how to do it using Nokogiri CSS since there are no html tags around it. When an at_css(.phonetitle) it only parse Phone and not the number. <div class="detail"> <span class="address">Corner of Toorak Road and Chapel Street, South Yarra</span><br> <span class="phonetitle">Phone</span> 95435 34341 <br><br> </div>

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  • C++ input chaining in C#

    - by Monty
    I am trying to learn C# coming from C++. I am writing just some basic console stuff to get a feel for it and was wondering if it is possible to do simple chaining of inputs in C#. For example in C++: cout<<"Enter two numbers: "; cin >> int1 >> int2; You could then just input 3 5 and hit enter and the values will be fine. In C# however I have to split it up(as far as I can tell) like this: Console.Write("Enter the first number: "; int1 = (char)Console.Read(); Console.Writeline(""); Console.Write("Enter the second number: "; int2 = (char)Console.Read(); Maybe I am just missing something.

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  • Online Image Slideshow Question. File Access Problems.

    - by msandbot
    Hi, I have a flash .swf file that I embed on my webpage. On my server I have the .swf file and multiple image folders. I would like to load every file in one of those folders into the flash slideshow. How should I go about doing this? I tried used Air but it doesn't work on my system as an application so I doubt it will work online. Eventually I plan on making a menu where you can select different folders to display and since they are of different sizes, a foreach loop would be optimal. Keeping a txt file with the number of images is also possible if theres a way to read that in, but I would prefer the more dynamic approach. I am working towards using php for the website if that helps find a solution. Thanks, -Mike Also my slideshow works great online currently but i have to hardcode in the number of files.

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  • Can "\Device\NamedPipe\\Win32Pipes" handles cause "Too many open files" error?

    - by Igor Oks
    Continuing from this question: When I am trying to do fopen on Windows, I get a "Too many open files" error. I tried to analyze, how many open files I have, and seems like not too much. But when I executed Process Explorer, I noticed that I have many open handles with similar names: "\Device\NamedPipe\Win32Pipes.00000590.000000e2", "\Device\NamedPipe\Win32Pipes.00000590.000000e3", etc. I see that the number of these handles is exactly equal to the number of the iterations that my program executed, before it returned "Too many open files" and stopped. I am looking for an answer, what are these handles, and could they actually cause the "Too many open files" error? In my program I am loading files from remote drive, and I am creating TCP/IP connections. Could one of these operations create these handles?

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  • What are differences between AssemblyVersion, AssemblyFileVersion and AssemblyInformationalVersion?

    - by Jakub Šturc
    There are three assembly version attributes. What are differences? Is it ok if I use AssemblyVersion and ignore the rest? MSDN says: AssemblyVersion: Specifies the version of the assembly being attributed. AssemblyFileVersion: Instructs a compiler to use a specific version number for the Win32 file version resource. The Win32 file version is not required to be the same as the assembly's version number. AssemblyInformationalVersion: Defines additional version information for an assembly manifest. This is follow up to What are the best practices for using Assembly Attributes?

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  • C++ - dynamic pointer of array

    - by Eagle
    Hi to all, first i would like to say i am Newbie in C++. As part of my master thesis i am writing a program in C++ which also get as parameters the variables m and d (both integers). Were d is the power of 2 (this means 2^d elements). Parameter m define the number of possible interactions between one element and the total group (2^d elements). The number of possible interactions is computed as following: \kappa = \sum_{i=0}^m\binom{d}{i} (at present i generate vector of vectors for 2^d x \kappa, but my Prof. would like me to create different statistics to different m's. My first though was to to generate a dynamic array of m arrays of different sizes... Then i though of defining a 3-dim array with the biggest needed 2d array, but also program speed is important (e.g d = 20). i would like to ask for your advice how to define such kind of dynamic array that will also be fast. Regards

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  • what's syntax for uncheck the checkbox for in specific row?

    - by Annie Chen
    I'm new to JQuery, i want to uncheck certain row in the repeater grid. I got this work, this will uncheck all checkbox for me. $('span.chkIncRows input').attr('checked', false); This works for me, if I want to uncheck row #2 checkbox from the repeater, without passing row number. $('span.chkIncRows input')[2].checked =false; I don't know the syntax to uncheck the checkbox, if i want to pass in the row number into checkbox. For example: I really want to do something like this, but it doesn't work. $('span.chkIncRows input')[rowNumber].checked =false; Thanks advance for your help. Annie

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  • Preserve data in .net mvc

    - by Wei Ma
    I am implementing a search module with result page support paging. The example provided by NerdDinner passes pagenumber as a parameter for the Index action, and the action uses the pagenumber to perform a query each time the user hit a different page number. My problem is that my search take many more criteria such as price, material, model number etc. than just simple pagenumber. Therefore, I would like to preserve the criteria after users' first submission, so that I only have to pass the pagenumber back and forth. Using ViewData is not possible because ViewData get cleared once it is sent to the View. Is there any good way to preserve the criteria data as I wish?

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  • Tips for a first year CS student looking for a summer internship to gain experience?

    - by Matt
    Hello all, I am a first year CS student and my programming experience is only what I have obtained in my computer programming I and II classes this school year. (console applications in C++) I want to find a summer job/internship that would help me build my skill set. Being that I am still such a beginner pay is not a concern, minimum wage would be nice, but as long as I am learning, I really don't care. My current resume just lists a bunch of random jobs i've had in the past (burger king, summer camps, best buy, etc.) Does anyone have any tips (places to look? things to put on resume?) that might help me?

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  • How to perform COUNT() or COUNT(*)

    - by ninumedia
    I have a list of tags in a database. Ex: villan hero spiderman superman superman I wanted to obtain a sorted list of the tag names in ascending order and the number of times the unique tag appeared in the database. I wrote this code: Ex: SELECT hashtag.tag_name, COUNT( * ) AS number FROM hashtag GROUP BY hashtag.tag_name ORDER BY hashtag.tag_name ASC This yields the correct result: hero - 1 spiderman - 1 superman - 2 villan - 1 How can I obtain the full COUNT of this entire list. The answer should be 4 in this case because there are naturally 4 rows. I can't seem to get a correct COUNT() without the statement failing. Thanks so much for the help! :)

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  • Django Grouping Query

    - by Matt
    I have the following (simplified) models: class Donation(models.Model): entry_date = models.DateTimeField() class Category(models.Model): name = models.CharField() class Item(models.Model): donation = models.ForeignKey(Donation) category = models.ForeignKey(Category) I'm trying to display the total number of items, per category, grouped by the donation year. I've tried this: Donation.objects.extra(select={'year': "django_date_trunc('year', %s.entry_date)" % Donation._meta.db_table}).values('year', 'item__category__name').annotate(items=Sum('item__quantity')) But I get a Field Error on item__category__name. I've also tried: Item.objects.extra(select={"year": "django_date_trunc('year', entry_date)"}, tables=["donations_donation"]).values("year", "category__name").annotate(items=Sum("quantity")).order_by() Which generally gets me what I want, but the item quantity count is multiplied by the number of donation records. Any ideas? Basically I want to display this: 2010 - Category 1: 10 items - Category 2: 17 items 2009 - Category 1: 5 items - Category 3: 8 items

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  • Javascript : assign variable in if condition statement, good practice or not?

    - by Michael Mao
    Hi all: I moved one years ago from classic OO languages such like Java to Javascript. The following code is definitely not recommended (or even not correct) in Java: if(dayNumber = getClickedDayNumber(dayInfo)) { alert("day number found"); } function getClickedDayNumber(dayInfo) { dayNumber = dayInfo.indexOf("fc-day"); if(dayNumber != -1) //substring found { //normally any calendar month consists of "40" days, so this will definitely pick up its day number. return parseInt(dayInfo.substring(dayNumber+6, dayNumber+8)); } else return false; } Basically I just found out that I can assign a variable to a value in an if condition statement, and immediately check the assigned value as if it is boolean. For a safer bet, I usually separate that into two lines of code, assign first then check the variable, but now that I found this, I am just wondering whether is it good practice or not in the eyes of experienced javascript developers? Many thanks in advance.

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  • Good way to format decimal in SQL Server

    - by Brad
    We store a decimal(9,8) in our database. It can have any number of places after the decimal point (well, no more than 8). I am frustrated because I want to display it as human-readable text as part of a larger string created on the server. I want as many decimals to the right of the decimal point as are non-zero, for example: 0.05 0.12345 3.14159265 Are all good If I do CAST(d AS varchar(50)) I get formatting like: 0.05000000 0.12345000 3.14159265 I get similar output if I cast/convert to a float or other type before casting to a varchar. I know how to do a fixed number of decimal places, such as: 0.050 0.123 3.142 But that is not what I want. Yes, I know I can do this through complicated string manipulation (REPLACE, etc), there should be a good way to do it.

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  • Victory rewards in digital CCG

    - by Nils Munch
    I am currently polishing a digital CCG where people can play against friend and random opponents in a classical Magic the Gathering-like duel CCG. I plan to award the players with 20 ingame currency units (lets call them gold) for each hour they are playing, 50 for each day they are playing and X for each victory. Now, the X is what I am trying to calculate here, since I would prefer keeping the currency to a certain value, but also with to entice the players to battle. I could go with a solid figure, say 25, for beating up an opponent. But that would result in experienced players only beating up newly started players, making the experience lame for both. I could also make a laddered tier, where you start at level 1, and raise in level as you defeat your opponents, where winning over a player awards you his level x 2 in gold. Which would you prefer if you were playing a game like this. There is no gold-based scoreboard, but the gold is used to purchase new cards along the way.

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  • Complex select query question for hardcore SQL designers

    - by eugeneK
    Very complex query been trying to construct it for few days with more real success. I'm using SQL-SERVER 2005 Standard What i need is : 5 CampaignVariants from Campaigns whereas 2 are with the largest PPU number set and 3 are random. Next condition is that CampaignDailyBudget and CampaignTotalBudget are below what is set in Campaign ( calculation is number of clicks in Visitors table connected to Campaigns via CampaignVariants on which users click) Next condition CampaignLanguage, CampaignCategory, CampaignRegion and CampaignCountry must be the ones i send to this select with (languageID,categoryID,regionID and countryID). Next condition is that IP address i send to this select statement won't be in IPs list for current Campaign ( i delete inactive for 24 hours IPs ). In other words it gets 5 CampaignVariants for user that enters the site, when i take from user PublisherRegionUID,IP,Language,Country and Region view diagram

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  • jQuery Cycle Plugin - Content not cycling

    - by fmz
    I am setting up a page with jQuery's Cycle plugin and have four divs set to fade. I have the code in place, the images set, but it doesn't cycle properly. Firefox says there is a problem with the following code: <script type="text/javascript"> $(document).ready(function() { $('.slideshow').cycle({ fx: 'fade' }); }); </script> Here is the html: <div class="slideshow"> <div id="mainImg-1" class="slide"> <div class="quote"> <h2>Building Big Relationships with Small Business.</h2> <p>&ldquo;This is quote Number One.<br /> They are there when I need them the most.&rdquo;</p> <p><span class="author">Jane Doe &ndash; Charlotte Flower Shop</span></p> <div class="help"><a href="cb_services.html">Let Us Help You</a></div> </div> </div> <div id="mainImg-2" class="slide"> <div class="quote"> <h2>Building Big Relationships with Small Business.</h2> <p>&ldquo;This is quote Number Two.<br /> They are there when I need them the most.&rdquo;</p> <p><span class="author">Jane Doe &ndash; Charlotte Flower Shop</span></p> <div class="help"><a href="cb_services.html">Let Us Help You</a></div> </div> </div> <div id="mainImg-3" class="slide"> <div class="quote"> <h2>Building Big Relationships with Small Business.</h2> <p>&ldquo;This is quote Number three.<br /> They are there when I need them the most.&rdquo;</p> <p><span class="author">Jane Doe &ndash; Charlotte Flower Shop</span></p> <div class="help"><a href="cb_services.html">Let Us Help You</a></div> </div> </div> <div id="mainImg-4" class="slide"> <div class="quote"> <h2>Building Big Relationships with Small Business.</h2> <p>&ldquo;This is quote Number Fout.<br /> They are there when I need them the most.&rdquo;</p> <p><span class="author">Jane Doe &ndash; Charlotte Flower Shop</span></p> <div class="help"><a href="cb_services.html">Let Us Help You</a></div> </div> </div> Here is the CSS: .slideshow { width: 946px; height: 283px; border: 1px solid #c29c5d; margin: 8px; overflow: hidden; z-index: 1; } #mainImg-1 { width: 946px; height: 283px; background: url(../_images/main.jpg) no-repeat 9px 9px; } #mainImg-2 { width: 946px; height: 283px; background: url(../_images/main.jpg) no-repeat 9px 9px; } #mainImg-3 { width: 946px; height: 283px; background: url(../_images/main.jpg) no-repeat 9px 9px; } #mainImg-4 { width: 946px; height: 283px; background: url(../_images/main.jpg) no-repeat 9px 9px; } #mainImg-1 .quote, #mainImg-2 .quote, #mainImg-3 .quote, #mainImg-4 .quote { width: 608px; height: 168px; float: right; margin: 80px 11px 0 0; background: url(../_images/bg_quoteBox.png) repeat-x; } Before you go off and say, "hey, those images are all the same". You are right, the images are all the same right now, but the text should be rotating as well and there is a slight difference there. In addition, the fade should still show up. Anyway, you can see the dev page here: http://173.201.163.213/projectpath/first_trust/index.html I would appreciate some help to get this cycling through as it should. Thanks!

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  • Unique keys for Sphinx along three vectors instead of two

    - by Brendon Muir
    I'm trying to implement thinking-sphinx across multiple 'sites' hosted under a single rails application. I'm working with the developer of thinking-sphinx to sort through the finer details and am making good progress, but I need help with a maths problem: Usually the formula for making a unique ID in a thinking-sphinx search index is to take the id, multiply it by the total number of models that are searchable, and add the number of the currently indexed model: id * total_models + current_model This works well, but now I also through an entity_id into the mix, so there are three vextors for making this ID unique. Could someone help me figure out the equation to gaurantee that the id's will never collide using these three variables: id, total_models, total_entities The entity ID is an integer. I thought of: id * (total_models + total_entities) + (current_model + current_entity) but that results in collisions. Any help would be greatly appreciated :)

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  • Working with QuickBooks using LINQPad

    - by dataintegration
    The RSSBus ADO.NET Providers can be used from many applications and development environments. In this article, we show how to use LINQPad to connect to QuickBooks using the RSSBus ADO.NET Provider for QuickBooks. Although this example uses the QuickBooks Data Provider, the same process applies to any of our ADO.NET Providers. Create the Data Model Step 1: Download and install both the Data Provider from RSSBus and LINQPad (available at www.linqpad.net Step 2: Create a new project in Visual Studio and create a data model for it using the ADO.NET Entity Data Model wizard. Step 3: Create a new connection by clicking "New Connection", specify the connection string options, and click Next. Step 4: Select the desired tables and views and click Finish to create the data model. Step 5: Right click on the entity diagram and select 'Add Code Generation Item'. Choose the 'ADO.NET DbContext Generator'. Step 6: Now build the project. The generated files can be used to create a QuickBooks connection in LINQPad. Create the connection to QuickBooks in LINQPad Step 7:Open LINQPad and click 'Add New Connection'. Step 8: Choose 'Entity Framework DbContext POCO'. Step 9: Choose the data model assembly ('.dll') created by Visual Studio as the 'Path to Custom Assembly'. Choose the name of the custom DbContext, the path to the config file, and assign a name to the connection that will allow you to recognize its purpose. Step 10: Congratulations! Now you have a connection to QuickBooks, and you can query data through LINQPad.

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  • Calculating depth and descendants of tree

    - by yuudachi
    Can you guys help me with the algorithm to do these things? I have preorder, inorder, and postorder implemented, and I am given the hint to traverse the tree with one of these orders. I am using dotty to label (or "visit") the nodes. Depth is the number of edges from the root to the bottom leaf, so everytime I move, I add +1 to the depth? Something like that? No idea about the algorithm for descendants. They are asking about the number of nodes a specific node has under itself. These are normal trees btw.

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  • Check for bodies within a specific circle in Box2D

    - by ltjax
    I'm trying to find positions to insert new bodies into my world. For that, I'd like to have a "free" spot where this body wouldn't overlap with anything else. So my plan was to sample "random" positions and check whether they overlap with my "potential" new body. Since my bodies are always circular, I'd need to test within a given circle. So far, the only way to use box2d for this seems to use b2World::QueryAABB around my circle and manually doing an overlap test with all the fixtures it gives me (Box2D doesn't event seem to allow me to tap into its overlapping tests?!). It seems to me like Box2D should already provide such functionality - is there a way that lets me do this without reinventing most of the wheel again?

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