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  • How to create a compiler in vb.net

    - by Cyclone
    Before answering this question, understand that I am not asking how to create my own programming language, I am asking how, using vb.net code, I can create a compiler for a language like vb.net itself. Essentially, the user inputs code, they get a .exe. By NO MEANS do I want to write my own language, as it seems other compiler related questions on here have asked. I also do not want to use the vb.net compiler itself, nor do I wish to duplicate the IDE. The exact purpose of what I wish to do is rather hard to explain, but all I need is a nudge in the right direction for writing a compiler (from scratch if possible) which can simply take input and create a .exe. I have opened .exe files as plain text before (my own programs) to see if I could derive some meaning from what I assumed would be human readable text, yet I was obviously sorely disappointed to see the random ascii, though it is understandable why this is all I found. I know that a .exe file is simply lines of code, being parsed by the computer it is on, but my question here really boils down to this: What code makes up a .exe? How could I go about making one in a plain text editor if I wanted to? (No, I do not want to do that, but if I understand the process my goals will be much easier to achieve.) What makes an executable file an executable file? Where does the logic of the code fit in? This is intended to be a programming question as opposed to a computer question, which is why I did not post it on SuperUser. I know plenty of information about the System.IO namespace, so I know how to create a file and write to it, I simply do not know what exactly I would be placing inside this file to get it to work as an executable file. I am sorry if this question is "confusing", "dumb", or "obvious", but I have not been able to find any information regarding the actual contents of an executable file anywhere. One of my google searches Something that looked promising EDIT: The second link here, while it looked good, was an utter fail. I am not going to waste hours of my time hitting keys and recording the results. "Use the "Alt" and the 3-digit combinations to create symbols that do not appear on the keyboard but that you need in the program." (step 4) How the heck do I know what symbols I need??? Thank you very much for your help, and my apologies if this question is a nooby or "bad" one. To sum this up simply: I want to create a program in vb.net that can compile code in a particular language to a single executable file. What methods exist that can allow me to do this, and if there are none, how can I go about writing my own from scratch?

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  • professor of Java not knowing Groovy or Scala, normal or abnormal

    - by user311884
    i went to a prestigeous software conference (as dominant in its own field as MS in general), one main speaker is a professor of computer science who has been teaching Java for 20 years. During question session, he seems never heard of Groovy or Scala.... He is from a decent University in US... Is Groovy or Scala too new to attract academic attention or is this professor abnormal? thanks.

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  • Why is TortoiseSVN so slow?

    - by Zack Peterson
    I'm using TortoiseSVN to connect to my Subversion repository hosted with CVSDude. It's unreasonably slow--especially on small transfers... 5 kBytes transferred in 5 minute(s) and 9 second(s)?! It's not just slow to respond, though. It bogs the computer down for 5 minutes while processing those 5 kilobytes. Could there possibly be anything wrong with my installation or settings? Or, is the blame purely with my Subversion host, CVSDude?

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  • iphone usb connection

    - by sneha
    Hello everyone. I would like to know how any computer (mac, windows, linux) shows up media folder when an iPhone is connected. What protocols are used by that?

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  • Scheme Editor/IDE for Mac

    - by Carlton Gibson
    I've begun working through Structure and Interpretation of Computer Programs. Dutifully, I've installed mit-scheme. What I need now is an editor/IDE for the Mac that can handle the indentation and balance parentheses (or advice on how to best to configure the packaged tools). Any suggestions? TIA

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  • Trouble reinstalling Gem after power failure

    - by Sirupsen
    Yesterday I tried to install Jeweler via Rubygems, however somewhere in the middle of the process I had a power failure, resulting in my computer turning off in the middle of the installation process. Once I got it back up, I tried to reinstall Jeweler, however resulting in an error I've had trouble decoding. Does anyone have any idea on how to fix this problem? (I tried uninstall, cleanup and check)

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  • Resuming git-svn clone

    - by CaptainAwesomePants
    I started cloning a SVN repository using git-svn's clone operation. After about 6 hours of importing (it's a bit repo), my computer went and slept on me. Is there a way to resume the operation without redoing all of the initial work?

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  • Information on Rojiani's Numerical methods C textbook

    - by yCalleecharan
    Hi, having taken a look at a few textbooks that discuss numerical methods and C programming, I was gladly surprised when browsing through "programming in C with numerical methods for engineers" by Rojiani. I understand of course it's important that one need to have a solid background in numerical methods prior to try implementing them on a computer. I would like to know if someone here has been using this book and if possible point out strengths and weaknesses of this textbook. Thanks a lot...

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  • Sending keystrokes to a program

    - by Or Betzalel
    In window form, I made a button and I'm trying to make it send F1 to a specific window (Such as FireFox, My Computer, etc...) My questions are : How do I do it by the window's name? (such as "Mozilla Firefox") How do I do it by the process's name? (such as firefox.exe)

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  • Simulating the accelerometer event feature in Firefox 3.6?

    - by leeand00
    I just downloaded Firefox 3.6 today and I noticed in the list of new features they have an Orientation API that can detect the direction that your laptop/computer is tilted. This is clearly a hardware feature of some sort; So if you don't have the hardware to do so is there any way of simulating it so that you can test it out on your projects?

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  • XML Parsing Error - C#

    - by Indebi
    My code is having an XML parsing error at line 7 position 32 and I'm not really sure why Exact Error Dump 5/1/2010 10:21:42 AM System.Xml.XmlException: An error occurred while parsing EntityName. Line 7, position 32. at System.Xml.XmlTextReaderImpl.Throw(Exception e) at System.Xml.XmlTextReaderImpl.Throw(String res, Int32 lineNo, Int32 linePos) at System.Xml.XmlTextReaderImpl.HandleEntityReference(Boolean isInAttributeValue, EntityExpandType expandType, Int32& charRefEndPos) at System.Xml.XmlTextReaderImpl.ParseAttributeValueSlow(Int32 curPos, Char quoteChar, NodeData attr) at System.Xml.XmlTextReaderImpl.ParseAttributes() at System.Xml.XmlTextReaderImpl.ParseElement() at System.Xml.XmlTextReaderImpl.ParseElementContent() at System.Xml.XmlTextReaderImpl.Read() at System.Xml.XmlLoader.LoadNode(Boolean skipOverWhitespace) at System.Xml.XmlLoader.LoadDocSequence(XmlDocument parentDoc) at System.Xml.XmlLoader.Load(XmlDocument doc, XmlReader reader, Boolean preserveWhitespace) at System.Xml.XmlDocument.Load(XmlReader reader) at System.Xml.XmlDocument.Load(String filename) at Lookoa.LoadingPackages.LoadingPackages_Load(Object sender, EventArgs e) in C:\Users\Administrator\Documents\Visual Studio 2010\Projects\Lookoa\Lookoa\LoadingPackages.cs:line 30 Xml File, please note this is just a sample because I want the program to work before I begin to fill this repository <repo> <Packages> <TheFirstPackage id="00001" longname="Mozilla Firefox" appver="3.6.3" pkgver="0.01" description="Mozilla Firefox is a free and open source web browser descended from the Mozilla Application Suite and managed by Mozilla Corporation. A Net Applications statistic put Firefox at 24.52% of the recorded usage share of web browsers as of March 2010[update], making it the second most popular browser in terms of current use worldwide after Microsoft's Internet Explorer." cat="WWW" rlsdate="4/8/10" pkgloc="http://google.com"/> </Packages> <categories> <WWW longname="World Wide Web" description="Software that's focus is communication or primarily uses the web for any particular reason."> </WWW> <Fun longname="Entertainment & Other" description="Music Players, Video Players, Games, or anything that doesn't fit in any of the other categories."> </Fun> <Work longname="Productivity" description="Application's commonly used for occupational needs or, stuff you work on"> </Work> <Advanced longname="System & Security" description="Applications that protect the computer from malware, clean the computer, and other utilities."> </Advanced> </categories> </repo> Small part of C# Code //Loading the Package and Category lists //The info from them is gonna populate the listboxes for Category and Packages Repository.Load("repo.info"); XmlNodeList Categories = Repository.GetElementsByTagName("categories"); foreach (XmlNode Category in Categories) { CategoryNumber++; CategoryNames[CategoryNumber] = Category.Name; MessageBox.Show(CategoryNames[CategoryNumber]); } The Messagebox.Show() is just to make sure it's getting the correct results

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  • Access denied when start sqlexpress from command line

    - by Brettski
    Windows 7 computer running SQL Server Express 2008. When I try to run net start mssql$sqlexpress I receive an error: System error 5 has occurred. Access is denied The SQL service is running under "Network Service" account The service starts fine if I use the services window. Could somebody help me figure out why I am receiving this error?

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  • Upload large files via a webpage

    - by Hultner
    What way is the best way to let users upload large files from there webbrowser to a server. I'm talking 200MB+ possible up to a few gigatyes. I have been thinking of a few possible solutions to the problem (not tried them yet) and this is basically the things I came up with. Server download speed will not be a problem but the users connection possibly could. Having some sort of applet on the client side written in Java or Flash which sends the file in parts (is this possible with an applet) to a php/other script on the server and a checksum+ some other info about the file. On the server scripts all the parts and the info file is saved in a temporary directory wich has a unique name based on the checksum of the file and the ip of the user. When the last chunk is sent the applet sends a signal to the server saying it's finished and the server put the file together in the right location. If a chunk doesn't match the checksum for that part the server will send a response to the applet telling it to reupload that chunk. I don't know how important the checksum checking is since it's all tcpackages, someone with more insigth migth be able to answer on that. This is probably the worst way, changing the settings on your server to allow huge fileuploads via an inputfiel. Do it like a normal transfer. User an uploadmanager which does pretty much the same thing as applet i mentioned above. Pros of the first is probably that it would most likely be rather secure, you could show progress as well and possibly resume an upload if ip hasn't changed and do a threaded upload of the chunks. Cons of the first is that the user will need flash/java for it to work. Pros of the 2nd is that it will pretty much work for everyone but cons are big, first there's no way resuming an intruppted download and if something is wrong the whole file would have to be reuploaded is a few of cons. For the third one the pros is pretty muc the same as for the first but the cons is that the user would have to download an application to their computer and run and the application will have to be have to be compatible with their computer and OS. Another way may be a combination of two. Lets say an applet for bigger or more files and a simple input which is rather restricted to maybe max 10-20MB for smaller files and comability. There are probably other much smarter ways to tackle this and that's why I'm asking for advice here on SO.

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  • How to access Java servlet running on my PC from outside ?

    - by Frank
    I used Netbeans6.7 to write a servlet, when it runs, it opens a browser window with this address : http://localhost:8080/My_App/Test_Servlet, I replaced the "localhost" with my IP address, now it looks like this : http://192.???.1.??:8080/My_App/Test_Servlet, but I tried to access it from another computer outside my home, it can't read anything, I wonder if I need to change Windows Fire Wall setting to allow outside traffic, it's a Paypal IPN app, so I call Paypal, they said they can't access : http://192.???.1.??:8080/My_App/Test_Servlet What on my side should I do to allow traffic from "paypal.com" to access "My_App/Test_Servlet" ? Frank

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  • Socket throughput on localhost?

    - by gct
    I've got an app that's using sockets to push data, and I'm currently testing it on my localhost (so that the sender and receiver are on the same computer). I'm seeing between 36 and 66MB/s of throughput, which seems somewhat slow to me. What are normal throughput ranges for binary data on a local socket connection?

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  • Is LuaJIT really faster than every other JIT-ed dynamic languages?

    - by Gabriel Cuvillier
    According to the computer language benchmark game, the LuaJIT implementation seems to beat every other JIT-ed dynamic language (V8, Tracemonkey, PLT Scheme, Erlang HIPE) by an order of magnitude. I know that these benchmarks are not representative (as they say: "Which programming language implementations have the fastest benchmark programs?"), but this is still really impressive. In practice, is it really the case? Someone have tested that Lua implementation?

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  • SVN Mac - Stripping files of SVN meta data?

    - by Jasconius
    I downloaded some source files on a Mac that were previously part of some working copy on the authors computer, I need to use these files in another repository but the SVN client "Versions" for Mac is picking up on the data from this old repository. I can't find the ".SVN" folder anywhere... any idea on how to "cleanse" these files so I can commit them to my repository?

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  • Locating JNLP file contents

    - by pgebhard
    When running a JNLP file, the application is downloaded from the Internet. Where does it store these downloaded files? I'm trying to figure out how to copy the application to a computer without Internet access. FYI, I'm working with Java 1.6 (C:\Program Files\Java\jdk1.6.0_17).

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  • What is on your desk?

    - by Jack
    I have read that what you keep on your desk is very influential in how you work and your level of productivity. I am trying to optimise the way that I work (I am a terrible procrastinator), and am curious what other programmers' desks look like. What do you have on your desk? Is there anything you deliberately avoid? There is no need to mention if you have things like computer, screen, mouse, keyboard, or speakers.

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  • UNIX timestamp always in GMT?

    - by bn
    UNIX timestamp always in GMT? I tried to run php function time() and when I tried to convert the unix timestamp from the time() function, the output is not similar to the computer time. Thank You

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