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Articles indexed in March 2010

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  • Reading .ppt (MS PowerPoint) file in Cocoa Touch

    - by Biranchi
    Hi All, Any idea how to read a .ppt file in Cocoa Touch ? I tried to load the contents of the file in UIWebView but it didn't work. Here is the code : [aWebView loadData:[NSData dataWithContentsOfFile:filePath] MIMEType:@"application/vnd.ms-powerpoint" textEncodingName:@"utf-8" baseURL:[NSURL fileURLWithPath:filePath]]; [powerWeb loadData:[NSData dataWithContentsOfFile:filePath] MIMEType:@"application/vnd.ms-powerpoint" textEncodingName:@"utf-8" baseURL:[NSURL fileURLWithPath:filePath]]; All suggestions are highly appreciated. Thanks

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  • Can you force a crash if a write occurs to a given memory location with finer than page granularity?

    - by Joseph Garvin
    I'm writing a program that for performance reasons uses shared memory (alternatives have been evaluated, and they are not fast enough for my task, so suggestions to not use it will be downvoted). In the shared memory region I am writing many structs of a fixed size. There is one program responsible for writing the structs into shared memory, and many clients that read from it. However, there is one member of each struct that clients need to write to (a reference count, which they will update atomically). All of the other members should be read only to the clients. Because clients need to change that one member, they can't map the shared memory region as read only. But they shouldn't be tinkering with the other members either, and since these programs are written in C++, memory corruption is possible. Ideally, it should be as difficult as possible for one client to crash another. I'm only worried about buggy clients, not malicious ones, so imperfect solutions are allowed. I can try to stop clients from overwriting by declaring the members in the header they use as const, but that won't prevent memory corruption (buffer overflows, bad casts, etc.) from overwriting. I can insert canaries, but then I have to constantly pay the cost of checking them. Instead of storing the reference count member directly, I could store a pointer to the actual data in a separate mapped write only page, while keeping the structs in read only mapped pages. This will work, the OS will force my application to crash if I try to write to the pointed to data, but indirect storage can be undesirable when trying to write lock free algorithms, because needing to follow another level of indirection can change whether something can be done atomically. Is there any way to mark smaller areas of memory such that writing them will cause your app to blow up? Some platforms have hardware watchpoints, and maybe I could activate one of those with inline assembly, but I'd be limited to only 4 at a time on 32-bit x86 and each one could only cover part of the struct because they're limited to 4 bytes. It'd also make my program painful to debug ;)

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  • Creating a Windows XP installation flash drive in linux

    - by Alex
    How can I create a bootable flash drive to install Windows XP from under Linux? I have Ubuntu installed on my PC and want to install Windows XP parallelly. I already have an NTFS hard drive, so what I need is to install Windows there and make it available through a boot manager. I also have a Windows installation .iso. So how to produce a ready-for-installation USB-stick from this?

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  • "Save as webpage, complete" problem ?

    - by Adelave
    i have problem when i am trying to save web page from browser using "Save as Webpage, complete" some of CSS/Javascript/Image are not saved, thus when i reopen saved page offline webpage can't display properly. How do i solve this? How do i made webpage can be saved properly from browser ? i don't want to use MHT ext. Because what my situation here is i need to give URL for web designer to launch URL, saved webpage and modify CSS/HTML. Thanks

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  • How do I show the number of images attached to a post on the image attachment page?

    - by mattloak
    I use the image attachment page to show images attached to a post one by one, in a slideshow sort of affect. I'd like to be able to display the total number of images attached to the parent post and the number of the particular image that's being shown on any given attachment page so you see the picture and the words "Image 3 of 15" for example. I've played around with some different code and can get the total number of images to show on the post page, but when I insert the code on the attachment page template it always shows "1 of 1." I was having this problem a while ago and decided to re-address it, unfortunately I don't have the original code that I used and can't remember it. Anyone have any suggestions?

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  • Problem parsing an atom feed using simplexml_load_file(), can't get an attribute.

    - by Craig Ward
    Hi, I am trying to create a social timeline. I pull in feeds form certain places so I have a timeline of thing I have done. The problem I am having is with Google reader Shared Items. I want to get the time at which I shared the item which is contained in <entry gr:crawl-timestamp-msec="1269088723811"> Trying to get the element using $date = $xml->entry[$i]->link->attributes()->gr:crawl-timestamp-msec; fails because of the : after gr which causes a PHP error. I could figure out how to get the element, so thought I would change the name using the code below but it throws the following error Warning: simplexml_load_file() [function.simplexml-load-file]: I/O warning : failed to load external entity "<?xml version="1.0"?><feed xmlns:idx="urn:atom-extension:indexing" xmlns:media="http://search.yahoo.com/mrss/" xmlns <?php $get_feed = file_get_contents('http://www.google.com/reader/public/atom/user/03120403612393553979/state/com.google/broadcast'); $old = "gr:crawl-timestamp-msec"; $new = "timestamp"; $xml_file = str_replace($old, $new, $get_feed); $xml = simplexml_load_file($xml_file); $i = 0; foreach ($xml->entry as $value) { $id = $xml->entry[$i]->id; $date = date('Y-m-d H:i:s', strtotime($xml->entry[$i]->attributes()->timestamp )); $text = $xml->entry[$i]->title; $link = $xml->entry[$i]->link->attributes()->href; $source = "googleshared"; echo "date = $date<br />"; $sql="INSERT IGNORE INTO timeline (id,date,text,link, source) VALUES ('$id', '$date', '$text', '$link', '$source')"; mysql_query($sql); $i++; }` Could someone point me in the right direction please. Cheers Craig

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  • How to Work Around Limitations in Generic Type Constraints in C#?

    - by Jose
    Okay I'm looking for some input, I'm pretty sure this is not currently supported in .NET 3.5 but here goes. I want to require a generic type passed into my class to have a constructor like this: new(IDictionary<string,object>) so the class would look like this public MyClass<T> where T : new(IDictionary<string,object>) { T CreateObject(IDictionary<string,object> values) { return new T(values); } } But the compiler doesn't support this, it doesn't really know what I'm asking. Some of you might ask, why do you want to do this? Well I'm working on a pet project of an ORM so I get values from the DB and then create the object and load the values. I thought it would be cleaner to allow the object just create itself with the values I give it. As far as I can tell I have two options: 1) Use reflection(which I'm trying to avoid) to grab the PropertyInfo[] array and then use that to load the values. 2) require T to support an interface like so: public interface ILoadValues { void LoadValues(IDictionary values); } and then do this public MyClass<T> where T:new(),ILoadValues { T CreateObject(IDictionary<string,object> values) { T obj = new T(); obj.LoadValues(values); return obj; } } The problem I have with the interface I guess is philosophical, I don't really want to expose a public method for people to load the values. Using the constructor the idea was that if I had an object like this namespace DataSource.Data { public class User { protected internal User(IDictionary<string,object> values) { //Initialize } } } As long as the MyClass<T> was in the same assembly the constructor would be available. I personally think that the Type constraint in my opinion should ask (Do I have access to this constructor? I do, great!) Anyways any input is welcome.

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  • Tomcat6 MySql JDBC Datasource configuration

    - by Bob
    Hi, I've always used Spring's dependency injection to get datasource objects and use them in my DAOs, but now, I have to write an app without that. With Spring I can write something like this: <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> <property name="driverClassName" value="com.mysql.jdbc.Driver" /> <property name="url" value="jdbc:mysql://127.0.0.1/app?characterEncoding=UTF-8" /> <property name="username" value="u" /> <property name="password" value="p" /> </bean> But how can I use datasource in my DAOs without Spring or anything? I'm using servlets and JSPs only. Performance is very important factor. Thanks in advance!

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  • Zend Framework -> Zend_Log via application.ini => insert() on a non-object error

    - by TaMeR
    I am trying to get logging via the application.ini file going and I am getting stuck with an error. resources.log.db.writerName = "Db" resources.log.db.writerParams.db.adapter = "PDO_SQLITE" resources.log.db.writerParams.db.dbname = ROOT "/data/tmp.db3" resources.log.db.writerParams.db.table = "logs" resources.log.db.writerParams.db.columnMap.priority = "priority" resources.log.db.writerParams.db.columnMap.message = "message" Fatal error: Call to a member function insert() on a non-object in /var/www/libs/zend/library/Zend/Log/Writer/Db.php on line 137

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  • How to connect my APP to SQL Server?

    - by salhzmzm
    Hi I have 1 PC (MS Server 2003 + MS SQL Server 2008) and 2 PCs (MS SP2 + my APP) how I can let my APP connects to sql server 2008 on other PC My APP will connect to server to store data in SQL Server 2008 and read/delete/edit (basic operations) what is the best way to do that? NOTE: my APP is written in C# (.NET Platform)

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  • How to make <dl> layout horizontally?

    - by David
    I'm trying to develop a layout for my website in which elements of a definition list will be laid out horizontally, kind of like this: term 1 term 2 term 3 definition 1 definition 2 definition 3 Anyone know a way to make a definition list look like this using valid CSS? Or if I can't do it with a <dl>, what would be the recommended structure?

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  • Chat Service / Server for ASP.NET

    - by denisb
    I'm looking to have a livechat service integrated within a site where I can create chat rooms on the fly based on participants tied to that specific area... Anyone recommend using a 3rd party service I can install on the server that integrated easily with .NET, or just build one using polling method? I'd like something with socket connection, but not sure what's out there that either cheap or free that I can use.

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  • Where to find algorithms for standard math functions?

    - by dsimcha
    I'm looking to submit a patch to the D programming language standard library that will allow much of std.math to be evaluated at compile time using the compile-time function evaluation facilities of the language. Compile-time function evaluation has several limitations, the most important ones being: You can't use assembly language. You can't call C code or code for which the source is otherwise unavailable. Several std.math functions violate these and compile-time versions need to be written. Where can I get information on good algorithms for computing things such as logarithms, exponents, powers, and trig functions? I prefer just high level descriptions of algorithms to actual code, for two reasons: To avoid legal ambiguity and the need to make my code look "different enough" from the source to make sure I own the copyright. I want simple, portable algorithms. I don't care about micro-optimization as long as they're at least asymptotically efficient. Edit: D's compile time function evaluation model allows floating point results computed at compile time to differ from those computed at runtime anyhow, so I don't care if my compile-time algorithms don't give exactly the same result as the runtime version as long as they aren't less accurate to a practically significant extent.

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  • How to monitor and maintain my grails application in live/production environment?

    - by fabien7474
    It is the first time I have ever launched live a website (with Grails web framework under Amazon EC2 platform and Cloud Foundry) and I realized quickly that I am not ready for monitoring and maintening correctly my application in production mode (fortunately the website is accessible to a very limited number of users) . The issues I have faced so far are: Cannot change my views. I need to redeploy my application I have no monitoring. I don't know who is connected, when do they sign in / sign out... Redploying my application (upload WAR + deploy) takes at least 30 minutes. I don't know how to restart my Tomcat server without a redeploy through Cloud Foundry ! ... So, my question is very simple: What tools (including grails plugins) and methods can you recommend me for taking me out from my current blindness?

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  • refresh sub category combo box in php ?

    - by user298146
    Hello i need to refresh combo box (sub category ) related to what i choose in main category combo box , for example if i choose "chicken" in main category , the value of sub category will be "grilled chicken" , " fried chicken " ? how should i do this ? <select name="categorylist" id="categorylist"> <? $sql_query= mysql_query("select category_id,category_name, from categories"); while($fetch= mysql_fetch_array($sql_query)) { ?> <option value= " <? echo "$fetch[category_id];" ?> " selected="selected"><? echo "$fetch[category_name]"; ?> </option> <? } ?> what should i put in subcategory ?

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  • What does Postgres do when BEGIN is run on a connection in autocommit mode?

    - by DNS
    I'm trying to better understand the concept of 'autocommit' when working with a Postgres (psycopg) connection. Let's say I have a fresh connection, set its isolation level to ISOLATION_LEVEL_AUTOCOMMIT, then run this SQL directly, without using the cursor begin/rollback methods (as an exercise; not saying I actually want to do this): INSERT A INSERT B BEGIN INSERT C INSERT D ROLLBACK What happens to INSERTs C & D? Is autocommit is purely an internal setting in psycopg that affects how it issues BEGINs? In that case, the above SQL is unafected; INSERTs A & B are committed as soon as they're done, while C & D are run in a transaction and rolled back. What isolation level is that transaction run under? Or is autocommit a real setting on the connection itself? In that case, how does it affect the handling of BEGIN? Is it ignored, or does it override the autocommit setting to actually start a transaction? What isolation level is that transaction run under? Or am I completely off-target?

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  • Select all links from a Html table using XPath (and HtmlAgilityPack)

    - by Adam Asham
    What I am trying to achieve is to extract all links with a href attribute that starts with http://, https:// or /. These links lie within a table (tbody tr td etc) with a certain class. I thought I could specify just the the a element without the whole path to it but it does not seem to work. I get a NullReferenceException at the line that selects the links: var table = doc.DocumentNode.SelectSingleNode("//table[@class='containerTable']"); if (table != null) { foreach (HtmlNode item in table.SelectNodes("a[starts-with(@href, 'https://')]")) { //not working I don't know about any recommendations or best practices when it comes to XPath. Do I create overhead when I query the document two times?

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  • UIActionSheet position on landscape and portrait

    - by Dave
    UIActionSheet positioning is not centered when I open it in landscape mode. If I set bounds or change the frame. The contents inside the UIActionSheet which is a subview changes but the actual sheet remains in the same place which looks very awkward. How do I move the UIActionSheet along with it's subview to the center of the screen?

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  • TIF opens via IE, but not within a page

    - by tsilb
    I have a picture: http://www.kconnolly.net/Gallery/Panoramas/Mountainscapes/DSCN2049_stitch_sm.tif Which loads fine when I paste it into my address bar. However, when I embed it within a Page, I get a broken image icon. However, all browsers treat it as a download. Conversely, this image, which was made the same way, works fine when I embed it within a Page. Browsers treat this as a Document and not as a Download: http://www.kconnolly.net/Gallery/Panoramas/Mountainscapes/DSCN2060_stitch_sm.tif Why is that?

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