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  • Would making plain int 64-bit break a lot of reasonable code?

    - by R..
    Until recently, I'd considered the decision by most systems implementors/vendors to keep plain int 32-bit even on 64-bit machines a sort of expedient wart. With modern C99 fixed-size types (int32_t and uint32_t, etc.) the need for there to be a standard integer type of each size 8, 16, 32, and 64 mostly disappears, and it seems like int could just as well be made 64-bit. However, the biggest real consequence of the size of plain int in C comes from the fact that C essentially does not have arithmetic on smaller-than-int types. In particular, if int is larger than 32-bit, the result of any arithmetic on uint32_t values has type signed int, which is rather unsettling. Is this a good reason to keep int permanently fixed at 32-bit on real-world implementations? I'm leaning towards saying yes. It seems to me like there could be a huge class of uses of uint32_t which break when int is larger than 32 bits. Even applying the unary minus or bitwise complement operator becomes dangerous unless you cast back to uint32_t. Of course the same issues apply to uint16_t and uint8_t on current implementations, but everyone seems to be aware of and used to treating them as "smaller-than-int" types.

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  • Curious: Could LLVM be used for Infocom z-machine code, and if so how? (in general)

    - by jonhendry2
    Forgive me if this is a silly question, but I'm wondering if/how LLVM could be used to obtain a higher performance Z-Machine VM for interactive fiction. (If it could be used, I'm just looking for some high-level ideas or suggestions, not a detailed solution.) It might seem odd to desire higher performance for a circa-1978 technology, but apparently Z-Machine games produced by the modern Inform 7 IDE can have performance issues due to the huge number of rules that need to be evaluated with each turn. Thanks! FYI: The Z-machine architecture was reverse-engineered by Graham Nelson and is documented at http://www.inform-fiction.org/zmachine/standards/z1point0/overview.html

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  • Project management and bundling dependencies

    - by Joshua
    I've been looking for ways to learn about the right way to manage a software project, and I've stumbled upon the following blog post. I've learned some of the things mentioned the hard way, others make sense, and yet others are still unclear to me. To sum up, the author lists a bunch of features of a project and how much those features contribute to a project's 'suckiness' for a lack of a better term. You can find the full article here: http://spot.livejournal.com/308370.html In particular, I don't understand the author's stance on bundling dependencies with your project. These are: == Bundling == Your source only comes with other code projects that it depends on [ +20 points of FAIL ] Why is this a problem, (especially given the last point)? If your source code cannot be built without first building the bundled code bits [ +10 points of FAIL ] Doesn't this necessarily have to be the case for software built against 3rd party libs? Your code needs that other code to be compiled into its library before the linker can work? If you have modified those other bundled code bits [ +40 points of FAIL ] If this is necessary for your project, then it naturally follows that you've bundled said code with yours. If you want to customize a build of some lib,say WxWidgets, you'll have to edit that projects build scripts to bulid the library that you want. Subsequently, you'll have to publish those changes to people who wish to build your code, so why not use a high level make script with the params already written in, and distribute that? Furthermore, (especially in a windows env) if your code base is dependent on a particular version of a lib (that you also need to custom compile for your project) wouldn't it be easier to give the user the code yourself (because in this case, it is unlikely that the user will already have the correct version installed)? So how would you respond to these comments, and what points may I be failing to take into consideration? Would you agree or disagree with the author's take (or mine), and why?

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  • [LINQ] Nested query problem

    - by code-zoop
    I have 3 classes in C#: classclass Folder { int Id { get; set; } List<File> files { get; set;} } class File { int Id { get; set; } Author author { get; set; } } class Author { int Id { get; set; } string Name { get; set; } } I have a list of Folder items (List): var folders = getAllFolders(); How can I use Linq to return a list of Folders from the list when i only know the Author id of the files? I need the list to contain all folders where a given Author has created a file! Thanks

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  • File streaming in PHP - How to replicate this C#.net code in PHP?

    - by openid_kenja
    I'm writing an interface to a web service where we need to upload configuration files. The documentation only provides a sample in C#.net which I am not familiar with. I'm trying to implement this in PHP. Can someone familiar with both languages point me in the right direction? I can figure out all the basics, but I'm trying to figure out suitable PHP replacements for the FileStream, ReadBytes, and UploadDataFile functions. I believe that the RecService object contains the URL for the web service. Thanks for your help! private void UploadFiles() { clientAlias = “<yourClientAlias>”; string filePath = “<pathToYourDataFiles>”; string[] fileList = {"Config.txt", "ProductDetails.txt", "BrandNames.txt", "CategoryNames.txt", "ProductsSoldOut.txt", "Sales.txt"}; RecommendClient RecService = new RecommendClient(); for (int i = 0; i < fileList.Length; i++) { bool lastFile = (i == fileList.Length - 1); //start generator after last file try { string fileName = filePath + fileList[i]; if (!File.Exists(fileName)) continue; // file not found } // set up a file stream and binary reader for the selected file and convert to byte array FileStream fStream = new FileStream(fileName, FileMode.Open, FileAccess.Read); BinaryReader br = new BinaryReader(fStream); byte[] data = br.ReadBytes((int)numBytes); br.Close(); // pass byte array to the web service string result = RecService.UploadDataFile(clientAlias, fileList[i], data, lastFile); fStream.Close(); fStream.Dispose(); } catch (Exception ex) { // log an error message } } }

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  • Physical Cores vs Virtual Cores in Parallelism

    - by Code Curiosity
    When it comes to virtualization, I have been deliberating on the relationship between the physical cores and the virtual cores, especially in how it effects applications employing parallelism. For example, in a VM scenario, if there are less physical cores than there are virtual cores, if that's possible, what's the effect or limits placed on the application's parallel processing? I'm asking, because in my environment, it's not disclosed as to what the physical architecture is. Is there still much advantage to parallelizing if the application lives on a dual core VM hosted on a single core physical machine?

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  • Authentication Failed exception - In the middle of bulk mail sending code.

    - by Ezhil
    We have a thread program that sends bulk mail. The information like 1. To 2. Subject Etc., are fetched from database, mail is composed and pushed to SMTP server. One of our customer sent a bulk mail with 2390 email. After sending 40 emails, suddenly the following exception occurred EXCEPTION javax.mail.AuthenticationFailedException STACKTRACE javax.mail.Service.connect(Service.java:306) javax.mail.Service.connect(Service.java:156) javax.mail.Service.connect(Service.java:105) ............... java.lang.Thread.run(Thread.java:619) and the rest 2350 emails failed. Why does this occur? Thanks for the Suggestions and Help Ezhil

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  • How to import music into Android library

    - by android_dev
    Hello, I would like to know how can I import songs from a web service into Android library without having to download the file into sdcard. I have all the data from the web service but I do not know how to integrate the tracks into Android database. My idea is not to have to download the files, but playing them on streaming using the music player. Do I need to download the tracks to the sd card and then Android does all the stuff? Thanks in advance

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  • prevent users from downloading music

    - by Duy Nguyen
    hi guys, i have been writing a music website for my customer using ASP.NET. Everything has been cool except I don't know how to prevent the users from downloadng the song which is being played. For example, I click "Heal the world" to play and while the song is playing, I dont't want the IDM download manager or other download programs appear the download dialog

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  • Deal with undefined values in code or in the template?

    - by David
    I'm writing a web application (in Python, not that it matters). One of the features is that people can leave comments on things. I have a class for comments, basically like so: class Comment: user = ... # other stuff where user is an instance of another class, class User: name = ... # other stuff And of course in my template, I have <div>${comment.user.name}</div> Problem: Let's say I allow people to post comments anonymously. In that case comment.user is None (undefined), and of course accessing comment.user.name is going to raise an error. What's the best way to deal with that? I see three possibilities: Use a conditional in the template to test for that case and display something different. This is the most versatile solution, since I can change the way anonymous comments are displayed to, say, "Posted anonymously" (instead of "Posted by ..."), but I've often been told that templates should be mindless display machines and not include logic like that. Also, other people might wind up writing alternate templates for the same application, and I feel like I should be making things as easy as possible for the template writer. Implement an accessor method for the user property of a Comment that returns a dummy user object when the real user is undefined. This dummy object would have user.name = 'Anonymous' or something like that and so the template could access it and print its name with no error. Put an actual record in my database corresponding to a user with user.name = Anonymous (or something like that), and just assign that user to any comment posted when nobody's logged in. I know I've seen some real-world systems that operate this way. (phpBB?) Is there a prevailing wisdom among people who write these sorts of systems about which of these (or some other solution) is the best? Any pitfalls I should watch out for if I go one way vs. another? Whoever gives the best explanation gets the checkmark.

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  • MySQL replication - Should I handle load balancing from my client code (PHP) ?

    - by pirostraktor
    In a MySQL master-slave replication enviroment if I have 4 slave servers how can I execute load balanced select queries? Should I write a PHP class to dealing with the 4 slaves or it is possible to address queries to MySQL's own load balancer solution? Is there a MySQL load balancing solutions? Can I use some other tool to distribute my queries? What is the typical set up in situations like this? Thanks for all answers!

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  • I need to speed this code at least 2 times!

    - by Dominating
    include include include include using namespace std; inline void PrintMapName(multimap pN, string s) { pair::iterator, multimap::iterator ii; multimap::iterator it; ii = pN.equal_range(s); multimap tmp; for(it = ii.first; it != ii.second; ++it) { tmp.insert(pair(it-second,1)); } multimap::iterator i; bool flag = false; for(i = tmp.begin(); i != tmp.end(); i++) { if(flag) { cout<<" "; } cout<first; if(flag) { cout<<" "; } flag = true; } cout< int main() { multimap phoneNums; multimap numPhones; int N; cinN; int tests; string tmp, tmp1,tmp2; while(N 0) { cintests; while(tests 0) { cintmp; if(tmp == "add") { cintmp1tmp2; phoneNums.insert(pair(tmp1,tmp2)); numPhones.insert(pair(tmp2,tmp1)); } else { if(tmp == "delnum") { cintmp1; multimap::iterator it; multimap::iterator tmpr; for(it = phoneNums.begin(); it != phoneNums.end();it++) { tmpr = it; if(it-second == tmp1) { phoneNums.erase(it,tmpr); } } numPhones.erase(tmp1); } else { if(tmp == "delname") { cintmp1; phoneNums.erase(tmp1); multimap::iterator it; multimap::iterator tmpr; for(it = numPhones.begin(); it != numPhones.end();it++) { tmpr = it; if(it-second == tmp1) { numPhones.erase(it,tmpr); } } } else { if(tmp =="queryname") { cintmp1; PrintMapName(phoneNums, tmp1); } else//querynum { cintmp1; PrintMapName(numPhones, tmp1); } } } } tests--; } N--; } return 0; }

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  • Where do you manually insert assertions into an automated coded ui test's code in VS2010?

    - by user1649536
    I am currently automating smoke tests and I am trying to learn how to manually insert assertions with C# into the UImap.Designer.cs file. I am trying to learn how to do this manually but I have no direction on where to put the assertions and all the literature I am finding only covers how to add assertions with the CodedUI Test Builder tool that is included with VS2010. Can anyone direct me to where I need to insert the assertions?

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  • How do I set up for sharing code (ASP.NET) across multiple domain names?

    - by Scott J.
    I have built a website and now the customer wants to split it between three different domains. What is the best way to do this? This is what I have so far. c:/website1/ points to www.website1.com c:/website1/vd1/ points to www.website2.com c:/website1/vd2/ points to www.website3.com The webhost I'm working with has done it the following way, but now I'm getting a bunch of errors that seems like it's not seeing the App_code folder. Do I need to make a lot of changes? How does this affect the location references?

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  • This code is not submitting to a form? Why

    - by Ankur
    Since I am using get I expect to see the submitted values appended to the queryString but instead all I see is the URL of the servlet being called with nothing added at the end. <form id="editClassList" name="editClassList" method="get" action="EditClassList"> <% HashMap<Integer,String> classes = new HashMap<Integer,String>(); classes = (HashMap<Integer,String>) request.getAttribute("classes"); %> <% if(classes.size()==0){ %> <label><input class="small-link" type="text" id="add-this-class" size="42" value="" /></label> <% } %> <% Set<Integer> classIds = new HashSet<Integer>(); classIds = classes.keySet(); Iterator<Integer> itr = classIds.iterator(); while(itr.hasNext()){ int nextId = (Integer)itr.next(); %> <label><input class="small-link" type="text" id="<% out.print(nextId); %>" size="42" value="<% out.print(classes.get(nextId)); %>" /> </label> <img id="add-class" src="images/add.png" width="16" height="16" /><br /> <label><input class="small-link" type="text" id="class-to-add" size="42" value="" /></label> <% } %> <label><input type="submit" id="save-class-btn" value="Save Class(es)" /></label> </form>

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  • From my code, I can't trace the out of bounds exception.

    - by Matt
    public override Models.CalculationNode Parse(string expression) { var calNode = new Models.CalculationNode(); int i = expression.Length; char[] x = expression.ToCharArray(); string temp = ""; //Backwards assembly of the tree //Right Node while (!IsOperator(x[i]) && i > 0) { if (!x[i].Equals(' ')) temp = x[i] + temp; i--; } } It has been a while since I've used trees and I'm getting an out of bounds exception in the while loop.

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  • Need to Post json data using jQuery.ajax

    - by Anil Bhat
    I have a json of the following format which I need to send in the Ajax request through POST method: { “gbus”: [ { "code": "*" } ], “regions”: [ { "code": "*" } ], “offices”: [ { "code": "*" } ], “contracttypes”: [ { "code": "*" } ], “jobnumbers”: [ { "code": "*" } ], “disciplines”: [ { "code": "*" } ] } Its not working for me, giving 500 error always when I try to submit it. Please suggest if you have any idea.

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  • Should I be using assert in my PHP code?

    - by Darryl Hein
    A co-worker has added the assert command a few times within our libraries in places where I would have used an if statement and thrown an exception. (I had never even heard of assert before this.) Here is an example of how he used it: assert('isset($this->records); /* Records must be set before this is called. */'); I would have done: if ( ! isset($this->records) { throw new Exception('Records must be set before this is called'); } From reading the PHP docs on assert, it looks like it's recommended that make sure assert is active and add a handler before using assert. I can't find a place where he's done this. So, my question is, is using assert a good idea given the above and should I be using it more often instead of if's and exceptions?

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  • Any WSGI middleware to make HTTP redirect on specific status code?

    - by Evgenyt
    I'm using Pylons and want to add some middleware to it so that it catches 401 status codes and makes HTTP Redirect (302) to Signin page. I know there is built-in StatusCodeRedirect in Pylons that acts in a similar fashion, but it does not produce HTTP redirect, and rather redirects internally (this is what I do not want). Is there any existing middleware to add, or any generic middleware that can be easily modified to make HTTP redirects on specific status codes?

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