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• Help me find some good 'Reflection' reading materials??

  - by IbrarMumtaz

  If it wasn't you guys I would've never discovered Albahari.com's free threading ebook. My apologies if I come off as being extremely lazy but I need to make efficient use of my time and make sure am not just swallowing any garbage of the web. Therefore I am looking for the best and most informative and with a fair bit of detail for the Reflection chapter in .Net. Reflection is something that comes up time and time again and I want to extend my reading from what I know already from the official 70-536 book. I'm not a big fan of MSDN but at the moment that's al I'm using. Anyone got any other good published reading material off the inter web that can help revision for the entrance exam??? Would be greatly appreciated !!! Thanks in Advance, Ibrar

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• Atoms and references

  - by StackedCrooked

  According to the book Programming Clojure refs manage coordinated, synchronous changes to shared state and atoms manage uncoordinated, synchronous changes to shared state. If I understood correctly "coordinated" implies multiple changes are encapsulated as one atomic operation. If that is the case then it seems to me that coordination only requires using a dosync call. For example what is the difference between: (def i (atom 0)) (def j (atom 0)) (dosync (swap! i inc) (swap! j dec)) and: (def i (ref 0)) (def j (ref 0)) (dosync (alter i inc) (alter j dec))

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• What does setting the GL color before doing a texture mapping operation do?

  - by quixoto

  I am looking at some sample code in a book that creates a jittered antialiasing effect by repeatedly rendering a scene (at different offsets) onto a offscreen texture, then using that texture to repeatedly draw a quad in the main view with some blend stuff set up. To accumulate the color "correctly", the code is setting the color like so: glColor4f(f, f, f, 1); where f is 1.0/number_of_samples, and then binding the offscreen texture and rendering it. Since textures come with their own color and alpha data, what is the effect (mathematically and intuitively) that setting the overall "color" in advance achieves? Thanks.

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• Which edition of windows internals should I read?

  - by pecker

  Hello, I want to get into windows driver development. I heard from the community that before diving into driver development one must be familiar with windows internals that means one must read "Windows Internals by Mark Russinovich. I'm going to buy this book today. Which edtition should I buy? 4th edition covers Windows XP & Windows 2003 where as 5th edition covers Windows Vista & windows server 2008. I don't know in driver world how much difference this thing would make. How different are these two editions? should I first read 4th edition & then come to 5th or should I directly dive into 5th?

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• How to build Object Oriented Skills?

  - by cedar715

  Being a core developer for couple of years, coding applications seeing the class diagrams, sequence diagrams, I decided to improve my self, taking the next step of designing. As I'm an OO developer, I'm interested in improving my design skills. For Example, I had a hard time designing a currency converter. My questions to the SO: Is it by experience the design skills can be acquired? Will learning books/blog/material over internet etc help? Is it that one needs the domain knowledge of the application being developed? Knowing Design patterns, principles? Studying 'Code Complete' book ? Need to have Problem-solving skills? In short, given a problem, I just want to solve it in Object-oriented way??

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• GroupLayout giving error with java swing

  - by Name

  I am getting some long list of error . Can anyone suggest me where i am wrong with group layout layout.setHorizontalGroup( layout.createSequentialGroup() .addComponent(new JLabel("Enter Book Name")) .addComponent(new JTextField("TextField", 20)) ); ERROR Exception in thread "main" java.lang.IllegalStateException: javax.swing.JTextField[,0,0,0x0,invalid,layout=javax.swing.plaf.basic.BasicTextUI$UpdateHandler,alignmentX=0.0,alignmentY=0.0,border=javax.swing.plaf.BorderUIResource$CompoundBorderUIResource@3d0bbf9e,flags=296,maximumSize=,minimumSize=,preferredSize=,caretColor=sun.swing.PrintColorUIResource[r=51,g=51,b=51],disabledTextColor=javax.swing.plaf.ColorUIResource[r=184,g=207,b=229],editable=true,margin=javax.swing.plaf.InsetsUIResource[top=0,left=0,bottom=0,right=0],selectedTextColor=sun.swing.PrintColorUIResource[r=51,g=51,b=51],selectionColor=javax.swing.plaf.ColorUIResource[r=184,g=207,b=229],columns=20,columnWidth=0,command=,horizontalAlignment=LEADING] is not attached to a vertical group at javax.swing.GroupLayout.checkComponents(Unknown Source) at javax.swing.GroupLayout.prepare(Unknown Source)

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• Please recommend good books for telemetry / SCADA system design & programming

  - by Mawg

  I am looking at several projects, all with roughly the same fucntionality. Some instruments collect some data (or control some functionality). They commmunicate by Internet (Etehrnet/wifi/GPRS/sasatellite) with a databse server which stores the measurements and provides a browser based means of qeurying the data, prodcuing reports, etc (and possibly also allows control of the remote equipment). Can anyone recommend a good book describing an approach to developing such a software architecture, keeping it generic, which tools, languages. test methods, etc to use? (note to self: ask a similar question about possible existing frameworks)

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• discover if mod_rewrite is working (MAMP + codeigniter)

  - by Patrick

  Hi, I'm experimenting (and having problems!) with codeigniter. In particular, links do not work. even if they are correct (eg. http://localhost/ci-book/welcome/cat/3, where welcome is controller, cat the method), they can't be open and chrome says "Oops! This link appears to be broken...." Someone suggested to check that mod_rewrite is working. How can I do that? I'm using Mamp. thanks, P.

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• why does .replace method use forward slash characters to enclose the first argument?

  - by Phillip Dodd

  I am working through a book about Javascript and have encountered the following example of code designed to replace the value of the class attribute of a table header HTML element: th.className = th.className.replace(/asc/,"dsc"); th.className = th.className.replace(/dsc/,"asc"); Why is the first parameter of .replace, the current value of th.className, enclosed in forward slashes instead of quotation marks? Why not use quotation marks to enclose both parameters, not just the second one? Thank you in advance for any help given. First time posting, apologies if I duplicated a question despite searching the site before posting.

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• Top tips for designing GUIs?

  - by oxbow_lakes

  A while back I read (before I lost it) a great book called GUI Bloopers which was full of examples of bad GUI design but also full of useful tidbits like Don't call something a Dialog one minute and a Popup the next. What top tips would you give for designing/documenting a GUI? It would be particularly useful to hear about widgets you designed to cram readable information into as little screen real-estate as possible. I'm going to roll this off with one of my own: avoid trees (e.g. Swing's JTree) unless you really can't avoid it, or have a unbounded hierarchy of stuff. I have found that users don't find them intuitive and they are hard to navigate and filter. PS. I think this question differs from this one as I'm asking for generalist tips

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• Ad hoc network between iPhone and non iPhone devices???

  - by gn-mithun

  Is it possible to set up a ad hoc network between an iPhone and a totally different device like camera,scanner or printer and build a data tunnel between them to exchange data or services. I believe iPhone does not have the provision of creating an ad hoc network. So i am assuming that the other device are the initiator of the ad hoc network. I tried doing the same with a mac book and iPhone and i could surf on the phone after enabling internet sharing. But i wanted to make sure that its possible with other devices as well I believe the upcoming WiFi Direct is a way to do it.

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• Why isn't the "this." command needed in this constructor? (java)

  - by David

  I'm reading a book about java. It just got to explaining how you create a class called "deck" which contains an array of cards as its instance variable(s). Here is the code snippit: class Deck { Card[] cards; public Deck (int n) { cards = new Card[n]; } } why isn't the this. command used? for example why isn't the code this: class Deck { Card[[] cards; public Deck (int n) { this.cards = new Card[n]; } }

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• PHP complete sample website source

  - by MarceloRamires

  I'm new to PHP, and it appears that the way I learn the fastest is to study a new language a well developed complete program (or website, in this case) changing stuff seeing what happens and consulting books. There are lots of recommendations of books all around, and that's pretty much covered. I'd like to find the sourcecode of a website. Either a well known, well developed open-source website, or a sample sourcecode of a complete website (maybe one used in a book or something). Everyone says they should find the way they learn better.. Well, that's mine. PS.: By complete I mean having several common functionalities (such as login), database connection, use of security conventions, maybe a popular framework, and being up-to-date.

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• Git: What is a tracking branch?

  - by jerhinesmith

  Can someone explain a "tracking branch" as it applies to git? Here's the definition from git-scm.com: A 'tracking branch' in Git is a local branch that is connected to a remote branch. When you push and pull on that branch, it automatically pushes and pulls to the remote branch that it is connected with. Use this if you always pull from the same upstream branch into the new branch, and if you don't want to use "git pull" explicitly. Unfortunately, being new to git and coming from SVN, that definition makes absolutely no sense to me. I'm reading through "The Pragmatic Guide to Git" (great book, by the way), and they seem to suggest that tracking branches are a good thing and that after creating your first remote (origin, in this case), you should set up your master branch to be a tracking branch, but it unfortunately doesn't cover why a tracking branch is a good thing or what benefits you get by setting up your master branch to be a tracking branch of your origin repository. Can someone please enlighten me (in English)?

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• n-grams from text in PostgreSQL

  - by harshsinghal

  I am looking to create n-grams from text column in PostgreSQL. I currently split(on white-space) data(sentences) in a text column to an array. select regexp_split_to_array(sentenceData,E'\s+') from tableName Once I have this array, how do I go about: Creating a loop to find n-grams, and write each to a row in another table Using unnest I can obtain all the elements of all the arrays on separate rows, and maybe I can then think of a way to get n-grams from a single column, but I'd loose the sentence boundaries which I wise to preserve. Sample SQL code for PostgreSQL to emulate the above scenario create table tableName(sentenceData text); INSERT INTO tableName(sentenceData) VALUES('This is a long sentence'); INSERT INTO tableName(sentenceData) VALUES('I am currently doing grammar, hitting this monster book btw!'); INSERT INTO tableName(sentenceData) VALUES('Just tonnes of grammar, problem is I bought it in TAIWAN, and so there aint any englihs, just chinese and japanese'); select regexp_split_to_array(sentenceData,E'\s+') from tableName; select unnest(regexp_split_to_array(sentenceData,E'\s+')) from tableName;

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• imagebutton alternative text doesn't appear in chrome

  - by salamonti

  image button alternative text doesn't appear in chrome browser this is html button code <div class="bookoffer"> <table class="headertable" style="padding-bottom: 0px; height: 100%;"> <tr> <td class="bookbt"> <asp:ImageButton AlternateText="Book" CssClass="bookstyle" ID="ImageButton1" runat="server" CommandArgument='<%# Eval("OfferID") %>' OnCommand="ImageButton1_Command" /> </td> </tr> </table> </div> why alternative text doesn't appear ?

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• Books on OpenGL ES targeted towards the iPhone

  - by Frank V

  There are a few posts on this site about OpenGL and the iPhone. Some even on books but I think you'll find this question is a bit different. I've searched and searched and have come to the conclusion that there are currently no books that specifically cover OpenGL ES on the iPhone platform. There are books that cover OpenGL ES [2.0] (note: the linked book covers OpenGL ES 2.0 but the iPhone uses OpenGL ES 1.1 which, I understand, is not backward compatible)... but they only have a small section for the iPhone (if any). What I want to know, is if anybody knows of any books that are forthcoming that specifically cover OpenGL ES 1.1 on the iPhone?

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• Help Forming An SQL Query That Selects The Max Difference Of Two Fields

  - by Frank

  I'm trying to select a record with the most effective votes. Each record has an id, the number of upvotes (int) and the number of downvotes (int) in a MySQL database. I know basic update, select, insert queries but I'm unsure of how to form a query that looks something like: SELECT * FROM topics WHERE MAX(topic.upvotes - topic.downvotes). Please excuse my made up SQL. The tutorials on SQL I find on the internet cover very basic stuff. Does anyone recommend a good book on this subject?

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• Why are difference lists more efficient than regular concatenation?

  - by Craig Innes

  I am currently working my way through the Learn you a haskell book online, and have come to a chapter where the author is explaining that some list concatenations can be ineffiecient: For example ((((a ++ b) ++ c) ++ d) ++ e) ++ f Is supposedly inefficient. The solution the author comes up with is to use 'difference lists' defined as newtype DiffList a = DiffList {getDiffList :: [a] -> [a] } instance Monoid (DiffList a) where mempty = DiffList (\xs -> [] ++ xs) (DiffList f) `mappend` (DiffList g) = DiffList (\xs -> f (g xs)) I am struggling to understand why DiffList is more computationally efficient than a simple concatenation in some cases. Could someone explain to me in simple terms why the above example is so inefficient, and in what way the DiffList solves this problem?

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• What would you do if you coded a C++/OO cross-platform framework and realize its laying on your disk

  - by Manuel

  This project started as a development platform because i wanted to be able to write games for mobile devices, but also being able to run and debug the code on my desktop machine too (ie, the EPOC device emulator was so bad): the platforms it currently supports are: Window-desktop WinCE Symbian iPhone The architecture it's quite complete with 16bit 565 video framebuffer, blitters, basic raster ops, software pixel shaders, audio mixer with shaders (dsp fx), basic input, a simple virtual file system... although this thing is at it's first write and so there are places where some refactoring would be needed. Everything has been abstracted away and the guiding principle are: mostly clean code, as if it was a book to just be read object-orientation, without sacrifying performances mobile centric The idea was to open source it, but without being able to manage it, i doubt the software itself would benefit from this move.. Nevertheless, i myself have learned a lot from unmaintained projects. So, thanking you in advance for reading all this... really, what would you do?

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• Why does my submit button fail to trigger Javascript MVC?

  - by user54197

  I have a simple code from a book and the code should display data from my controller in the "results" span. What am I missing? <asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server"> <script type="text/javascript"> $("form[action$='GetQuote']").submit(function() { $.post($(this).attr("action"), $(this).serialize(), function(response) { $("#results").html(response); }); return false; }); </script> <h2>Index</h2> <%using (Html.BeginForm("GetQuote","Stocks")) { %> Symbol: <%= Html.TextBox("symbol") %> <input type="submit" /> <span id="results"></span> <% } %> <p><i><%=DateTime.Now.ToLongTimeString() %></i></p> </asp:Content>

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• Return number of objects in NSArray

  - by Viral

  hi friends I am making a book application, in that for moving to next topic i am keeping a button. The Button works as it passes to the next topic , but at the end of the file my application gets message obj_fatal and it crashes. So if i can know that how many number of objects are there in my array(NSARRAY)den the problem will be solved. I am getting the details from a .plist file and storing it in to a array. So if any one know it please let me know. Thanks in advance. Viral.

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• How to approach this SQL query

  - by Kim

  I have data related as follows: A table of Houses A table of Boxes (with an FK back into Houses) A table of Things_in_boxes (with an FK back to Boxes) A table of Owners (with an FK back into Houses) In a nutshell, a House has many Boxes, and each Box has many Things in it. In addition, each House has many Owners. If I know two Owners (say Peter and Paul), how can I list all the Things that are in the Boxes that are in the Houses owned by these guys? Also, I'd like to master this SQL stuff. Can anyone recommend a good book/resource? (I'm using MySQL). Thanks!

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• Mathematics for AI/Machine learning ?

  - by Ankur Gupta

  I intend to build a simple recommendation systems for fun. I read a little on the net and figured being good at math would enable on to build a good recommendation system. My math skills are not good. I am willing to put considerable efforts and time in learning maths. Can you please tell me what mathematics topics should I cover? Also if any of you folks can point me to some online material to learn from it would be great. I am aware of MIT OCW, book like collective intelligence. Math Topics to cover and from where to read would really help.

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• stored procedures and triggers the same in sql server than mysql?

  - by user314877

  Hello, I have two stored procedures and one trigger for a class I am taking that are done in sql server 2005. I want to recreate them in mysql with phpmyadmin. Everytime i put them in I get a 1064 error. Is this becuase phpmyadmin does not handle stored procedures or triggers well, or is it becuase the syntax from sql server 2005 to mysql is very different? If it is this, then where could i go online to learn the correct syntax to write my stored procedures and triggers in mysql/phpmyadmin... or should I just pick up a book at barnes and nobles? This is my senior project.

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