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  • Lexing newlines in scala StdLexical?

    - by Nick Fortescue
    I'm trying to lex (then parse) a C like language. In C there are preprocessor directives where line breaks are significant, then the actual code where they are just whitespace. One way of doing this would be do a two pass process like early C compilers - have a separate preprocessor for the # directives, then lex the output of that. However, I wondered if it was possible to do it in a single lexer. I'm pretty happy with writing the scala parser-combinator code, but I'm not so sure of how StdLexical handles whitespace. Could someone write some simple sample code which say could lex a #include line (using the newline) and some trivial code (ignoring the newline)? Or is this not possible, and it is better to go with the 2-pass appproach?

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  • Python module seeing a full list as empty in another module

    - by Nick
    I'm working on a pygame project and have the main engine layed out. The problem is I hit a bug that I just can not seem to figure out. What happens is one module can't read a variable from another module. It's not that the variable can't be read, it just sees an empty list instead of what it really is. Instead of posting the entire source code I reproduced the bug in two small snippets that hopefully a skillful python-ist can interpret in his\her head. Code: main.py (This is the file that gets run) import screen screens = [] #A stack for all the game screens def current_screen(): #return a reference to the current screen return screens[-1] def play(): print'play called' current_screen().update() if __name__=='__main__': screens.append(screen.Screen()) play() screen.py import main class Screen: def __init__(self): print'screen made' def update(self): print main.screens #Should have a reference to itself in there Thanks!

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  • Deploying EAR file in Sun App Server having problem with proxy server setttings

    - by Nick Long
    When I am deploying certain vendor EAR file to Sun App Server, I encountered a connection timeout errror. I thought the reason might be proxy settings need to be defined so I actually defined the following -Dhttp.proxyHost=hostname -Dhttp.proxyPassword=password -Dhttp.proxyPort=8080 -Dhttp.proxyUser=username After setting these and restart domain then redeploy I encountered 407 error. Anyone have any idea what could be the issue here?

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  • what is wrong: "value Parsers is not a member of package scala.util.parsing.combinator"?

    - by Nick Fortescue
    I've got the above odd error message that I don't understand "value Parsers is not a member of package scala.util.parsing.combinator". I'm trying to learn Parser combinators by writing a C parser step by step. I started at token, so I have the classes: import util.parsing.combinator.JavaTokenParsers object CeeParser extends JavaTokenParsers { def token: Parser[CeeExpr] = ident } abstract class CeeExpr case class Token(name: String) extends CeeExpr This is as simple as I could make it. The code below works fine, but if I uncomment the commented line I get the error message given above: object Play { def main(args: Array[String]) { //val parser: _root_.scala.util.parsing.combinator.Parsers.Parser[CeeExpr] CeeParser.token val x = CeeParser.token print(x) } } In case it is a problem with my setup, I'm using scala 2.7.6 via the scala-plugin for intellij. Can anyone shed any light on this? The message is wrong, Parsers is a member of scala.util.parsing.combinator.

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  • Examples using Active Directory/LDAP groups for permissions \ roles in Rails App.

    - by Nick Gorbikoff
    Hello. I was wondering how other people implemented this scenario. I have an internal rails app ( inventory management, label printing, shipping,etc). I'm rewriting security on the system, cause the old way got to cumbersome to maintain ( users table, passwords, roles) - I used restful_authentication and roles. It was implemented about 3 years ago. I already implemented AuthLogic with ruby-ldap-net to authenticate users ( actually that was surprisingly easy, compared to how I struggled with other frameworks/languages before). Next step is roles. I already have groups defined in Active Directory - so I don't want to run a separate roles system in my rails app, I just want to reuse Active Directory groups - since that part of the system is already maintained for other purposes ( shared drives, backups, pc access, etc) So I was wondering if others had experience implementing permissions/roles in a rails app based on groups in Active Directory or LDAP. Also the roles requirements are pretty complex. Here is an example: For instance I have users that belong to the supervisors group in AD and to inventory dept, so I was that user to be able to run "advanced" tasks in invetory - adjust qty, run reports, however other "supervisors" from other departmanets, shouldn't be able to do this, also Top Management - should be able to use those reports (regardless weather they belong to the invetory or not), but not Middle Management, unless they are in inventory group. Admins of the system (Domain Admins) should have unrestricted access to the system , except for HR & Finances part unless they are in HR ( like you don't want all system admins (except for one authorized one) to see personal info of other employees). I looked at acl9, cancan, aegis. I was wondering if there are any advantaged/cons to using one versus the other for this particular use of system access based on AD. Suggest other systems if you had good experience. Thank you!!!

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  • Recursive Binary Search Tree Insert

    - by Nick Sinklier
    So this is my first java program, but I've done c++ for a few years. I wrote what I think should work, but in fact it does not. So I had a stipulation of having to write a method for this call: tree.insertNode(value); where value is an int. I wanted to write it recursively, for obvious reasons, so I had to do a work around: public void insertNode(int key) { Node temp = new Node(key); if(root == null) root = temp; else insertNode(temp); } public void insertNode(Node temp) { if(root == null) root = temp; else if(temp.getKey() <= root.getKey()) insertNode(root.getLeft()); else insertNode(root.getRight()); } Thanks for any advice.

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  • Should I include the binary in a Rails plugin or not?

    - by Nick Gorbikoff
    Hello. I'm trying to roll out a little Rails plugin that is basically is just a wrapper to a 7zip archiver. Should I include the 7zip binaries for windows, mac and linux with it or explain to user that it's a dependency and they need to get it working. I know it's not that difficult to install a 7zip, but what is the best practice in general. The reason I'm asking is cause I've ran so many times into gems that need some sort of dependency that doesn't compile properly or is not available in ready form for the OS in question and then I end up spending have a day hunting down for a binary or a way to compile the program. (Have happened to me both on Mac and Windows, not on Debian so far. )

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  • Converting a navbar to a tabbar app

    - by Nick
    Hey guys, I was wondering how to convert a NavigationController style app into a TabBarcontroller style app. I changed my mainwindow to not contain a navigationcontroller anymore (but a tabbarcontroller instead) and my delegate also appropiatly, but when I launch the app something still thinks I want a navigationController: Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[ setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key navigationController.' Stack trace: #0 0x020fa004 in ___TERMINATING_DUE_TO_UNCAUGHT_EXCEPTION___ #1 0x96fc0509 in objc_exception_throw #2 0x020ee1c1 in -[NSException raise] #3 0x000d8a78 in _NSSetUsingKeyValueSetter #4 0x000d84c5 in -[NSObject(NSKeyValueCoding) setValue:forKey:] #5 0x004fb4c8 in -[UIRuntimeOutletConnection connect] #6 0x020af92f in -[NSArray makeObjectsPerformSelector:] #7 0x004f9f7f in -[UINib instantiateWithOptions:owner:loadingResourcesFromBundle:] #8 0x004fbfcb in -[NSBundle(NSBundleAdditions) loadNibNamed:owner:options:] #9 0x0033b0a6 in -[UIApplication _loadMainNibFile] #10 0x0034482a in -[UIApplication _runWithURL:sourceBundleID:] #11 0x00341b88 in -[UIApplication handleEvent:withNewEvent:] #12 0x0033d6d3 in -[UIApplication sendEvent:] #13 0x003440b5 in _UIApplicationHandleEvent #14 0x0265aed1 in PurpleEventCallback #15 0x02092b80 in CFRunLoopRunSpecific #16 0x02091c48 in CFRunLoopRunInMode #17 0x0033be69 in -[UIApplication _run] #18 0x00345003 in UIApplicationMain #19 0x00002ec8 in main at main.m:14 Where can I specify the app is a tabbarcontrolled app, instead of a navigationbarcontrolled app? Thanks in advance,

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  • Divs, flash and doctype :(

    - by nick
    I have a web-site, that uses colorbox, it also has flash header. Everything works fine in both ff and ie. Before ive started to use colorbox, i had little div that covered small part of flash header for menu purposes. Now, since im using colorbox, i had to declare doctype, and set wmode on flash to 'opaque', in order everything to work right way.But now i cant get that little div, to appear on top of my flash header. If anyone can help me with this, please do so.... or atleast tell me what should i read : ( im will be very gratefull for any solution. current html document structure: ... all the js and css files ... heres that div's style from corresponding css file: .cell_r0_c0{position: absolute;left: 61%;width:260;height:69; background-color: #000000; vertical-align: bottom;} I think i've allready tried all the combinations of position attribute, also tried diff z-index values, and i can't get it work the way i want. Maybe ive missed something idk. Please help me :(

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  • Publishing web service on IIS 7 gives 500.19 - Internal Server Error

    - by Nick
    Hello. I have created a folder and published my webservice to this folder. I then created an application (in IIS 7) and pointed it at this folder location. When I try and hit the ASMX file from a browser on the local machine I get the following error: HTTP Error 500.19 - Internal Server Error The requested page cannot be accessed because the related configuration data for the page is invalid. Can someone tell me why?

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  • 'Step Into' is suddenly not working in Visual Studio

    - by Nick LaMarca
    All of a sudden, I have run into an issue where I cannot step into any code through debugging in Visual Studio. The step over works fine, but it refuses to step into (F11) any of my code. This was working before, now all of a sudden it does not. I've tried some things below, but I still had no success: Delete all bin files in every project in my solution, clean solution, re-build solution. Build projects in solution indivdualy Restart machine It an ASP.NET C# application consuming a WCF sevice locally. It is in debug mode. I have a breakpoint set on the page consuming the service. The breakpoint hits, but it will not step into the service code. The ASP.NET site and the service code is all in the same solution. This all of a sudden does not work, it did work before. How can I fix this problem? Adding a breakpoint to the service project I get a warning: Breakpoint will not currently be hit. No symbols have been loaded for this document. I deleted all the bin folders for all the projects and re-built them one by one. They all succeeded, but still I am getting the symbols won't load on any breakpoint I put into any project in the solution other than the ASP.NET project where the breakpoint works. I was able to debug step into all the projects before, this is an all of a sudden thing. Information from the output window.. 'WebDev.WebServer40.EXE' (Managed (v4.0.30319)): Loaded 'C:\windows\Microsoft.Net\assembly\GAC_MSIL\SMDiagnostics\v4.0_4.0.0.0__b77a5c561934e089\SMDiagnostics.dll', Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled. 'WebDev.WebServer40.EXE' (Managed (v4.0.30319)): Loaded 'C:\windows\Microsoft.Net\assembly\GAC_MSIL\System.Runtime.DurableInstancing\v4.0_4.0.0.0__31bf3856ad364e35\System.Runtime.DurableInstancing.dll', Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled. 'WebDev.WebServer40.EXE' (Managed (v4.0.30319)): Loaded 'C:\windows\Microsoft.Net\assembly\GAC_MSIL\System.Xaml.Hosting\v4.0_4.0.0.0__31bf3856ad364e35\System.Xaml.Hosting.dll', Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled. 'WebDev.WebServer40.EXE' (Managed (v4.0.30319)): Loaded 'C:\windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\2d49cf50\14eee2cf\App_Web_jmow15fw.dll', Symbols loaded. 'WebDev.WebServer40.EXE' (Managed (v4.0.30319)): Loaded 'C:\windows\Microsoft.Net\assembly\GAC_MSIL\System.Runtime.Serialization\v4.0_4.0.0.0__b77a5c561934e089\System.Runtime.Serialization.dll', Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled. 'WebDev.WebServer40.EXE' (Managed (v4.0.30319)): Loaded 'C:\windows\Microsoft.Net\assembly\GAC_MSIL\System.WorkflowServices\v4.0_4.0.0.0__31bf3856ad364e35\System.WorkflowServices.dll', Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled. 'WebDev.WebServer40.EXE' (Managed (v4.0.30319)): Loaded 'C:\windows\Microsoft.Net\assembly\GAC_MSIL\System.ServiceModel.Web\v4.0_4.0.0.0__31bf3856ad364e35\System.ServiceModel.Web.dll', Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled. 'WebDev.WebServer40.EXE' (Managed (v4.0.30319)): Loaded 'C:\windows\Microsoft.Net\assembly\GAC_MSIL\System.ServiceModel.Discovery\v4.0_4.0.0.0__31bf3856ad364e35\System.ServiceModel.Discovery.dll', Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled. 'WebDev.WebServer40.EXE' (Managed (v4.0.30319)): Loaded 'C:\windows\Microsoft.Net\assembly\GAC_MSIL\System.ServiceModel.Activities\v4.0_4.0.0.0__31bf3856ad364e35\System.ServiceModel.Activities.dll', Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled. 'WebDev.WebServer40.EXE' (Managed (v4.0.30319)): Loaded 'C:\windows\Microsoft.Net\assembly\GAC_MSIL\System.ServiceModel.Routing\v4.0_4.0.0.0__31bf3856ad364e35\System.ServiceModel.Routing.dll', Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled. 'WebDev.WebServer40.EXE' (Managed (v4.0.30319)): Loaded 'C:\windows\Microsoft.Net\assembly\GAC_MSIL\System.ServiceModel.Channels\v4.0_4.0.0.0__31bf3856ad364e35\System.ServiceModel.Channels.dll', Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled. 'WebDev.WebServer40.EXE' (Managed (v4.0.30319)): Loaded 'C:\windows\Microsoft.Net\assembly\GAC_MSIL\System.IdentityModel\v4.0_4.0.0.0__b77a5c561934e089\System.IdentityModel.dll', Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.

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  • How to handle all exceptions in a web java project

    - by Nick Donovan
    I am doing an web java project about an hotel reservation. I am using, sql, hibernate, java server pages. I want to know how can I redirect an incoming exception to an error.jsp file . There are a lot of java code , and a lot of jsp file. So I want to rederict every exception that I haven't handle to an error page, is there any way to do it ? An exception can come from everywhere and I can't know and handle them all ( for example an user can write to much data in an textfield, and it will generate me an sql exception for data to long) Thank you, sorry for my english.

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  • AddAllAttributes method spring mvc

    - by Nick Robertson
    I have two lists List<User> list_of_users=new ArrayList<User>(); List<String> list_of_attributes=new ArrayList<String>(); When i try to use the following lines of code: model.addAttribute("takeattributes",list_of_users); model.addAttribute("takeattributes",list_of_attributes); I realise that it keeps only the second list (list_of_attributes) and the first deleted. I was wondering how to keep both of these two lists in the model.Is this possible to be happened?Is the AddAllAttributes method what i need?If yes can anyone explain me how the AddAllAttributes method is working.I look at the spring mvc documentation but i didn't really understand.

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  • Base class with abstract subclasses in C# ?

    - by Nick Brooks
    public abstract class Request { public class Parameters { //Threre are no members here //But there should be in inherited classes } public Request() { parameters = new Parameters(); } public Parameters parameters; } Two questions: How do I make it so I can add stuff to the constructor but the original constructor will still be executed? How do I make it so the subclasses can add members to the Parameters class?

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  • Is there a way to keep a selenium session persistent accross multiple tests?

    - by Nick
    I am testing a django application's frontend with selenium and that's first time I use it. I have multiple tests that test things after user logged in. I want them to be separate tests, but I want to have only log in once, is that possible? (As oppose to what I do right now: I log in first, then execute my testing actions of test1, then log in again and execute my testing actions for test2, etc.)

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  • Control the size of points in an R scatterplot?

    - by Nick
    In R, the plot() function takes a pch argument that controls the appearance of the points in the plot. I'm making scatterplots with tens of thousands of points and prefer a small, but not too small dot. Basically, I find pch='.' to be too small, but pch=19 to be too fat. Is there something in the middle or some way to scale the dots down somehow?

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  • How to get SimpleRpcClient.Call() to be a blocking call to achieve synchronous communication with RabbitMQ?

    - by Nick Josevski
    In the .NET version (2.4.1) of RabbitMQ the RabbitMQ.Client.MessagePatterns.SimpleRpcClient has a Call() method with these signatures: public virtual object[] Call(params object[] args); public virtual byte[] Call(byte[] body); public virtual byte[] Call(IBasicProperties requestProperties, byte[] body, out IBasicProperties replyProperties); The problem: With various attempts, the method still continues to not block where I expect it to, so it's unable ever handle the response. The Question: Am I missing something obvious in the setup of the SimpleRpcClient, or earlier with the IModel, IConnection, or even PublicationAddress? More Info: I've also tried various paramater configurations of the QueueDeclare() method too with no luck. string QueueDeclare(string queue, bool durable, bool exclusive, bool autoDelete, IDictionary arguments); Some more reference code of my setup of these: IConnection conn = new ConnectionFactory{Address = "127.0.0.1"}.CreateConnection()); using (IModel ch = conn.CreateModel()) { var client = new SimpleRpcClient(ch, queueName); var queueName = ch.QueueDeclare("t.qid", true, true, true, null); ch.QueueBind(queueName, "exch", "", null); //HERE: does not block? var replyMessageBytes = client.Call(prop, msgToSend, out replyProp); } Looking elsewhere: Or is it likely there's an issue in my "server side" code? With and without the use of BasicAck() it appears the client has already continued execution.

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  • How to use dirent.h correctly.

    - by Nick
    Hello, I am new to C++ and I am experimenting with the dirent.h header to manipulate directory entries. The following little app compiles but pukes after you supple a directory name. Can someone give me a hint? The int quit is there to provide a while loop. I removed the loop in an attempt to isolate my problem. thanks! #include <iostream> #include <dirent.h> using namespace std; int main() { char *dirname = 0; DIR *pd = 0; struct dirent *pdirent = 0; int quit = 1; cout<< "Enter a directory path to open (leave blank to quit):\n"; cin >> dirname; if(dirname == NULL) { quit = 0; } pd = opendir(dirname); if(pd == NULL) { cout << "ERROR: Please provide a valid directory path.\n"; } return 0; }

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  • WPF - How do I style a row based on a binding property value?

    - by Nick
    Hey! So I am trying to bind a collection of objects (IList<) to a WPF datagrid. I would like to make the row background a different color if the 'artist' property is null or empty. I am checking the value stored at the property on the LoadingRow datagrid event. Currently my implementation seems to style all of the rows with an empty or null 'artist' property correctly. The problem is that is also styles the rows where the property is not null or empty in some cases. So some rows are given the red background even though the rows 'artist' property is not null. Can anyone tell me why this could be?? Here is the LoadingRow event: private void trackGrid_LoadingRow(object sender, DataGridRowEventArgs e) { Track t = e.Row.DataContext as Track; if (String.IsNullOrEmpty(t.Artist)) { e.Row.Background = new System.Windows.Media.SolidColorBrush(System.Windows.Media.Color.FromArgb(255, 255, 125, 125)); } }

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  • Which Maven Glassfish plugin to use?

    - by Nick Klauer
    I've been trying to integrate deploying java .war's in Glassfish V3 through Maven. While I have found a few plugins, none of them look to be very active: Maven Glassfish Plugin Eskato's Wordpress Blog on Maven And I got the most information out of Eskato's Blog, it was written March 2008, so I don't know what the state of Glassfish Maven integration is, nor can I find a suitable plugin to work with. With the Maven Glassfish Plugin I have had some success, but it still doesn't work entirely well for all goals it says it supports, which makes some of the commands ineffective. Has anyone else been able to integrate Glassfish V3 and Maven successfully? If so, what resources did you use to get it done?

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  • GWT 2.0 and Dynamic (or lack thereof) Grids

    - by nick
    Still new to GWT and was attempting to create a dynamic grid using the UiBinder. However I got a strange (and horribly misleading) error about the tag for grid not being properly closed. After a bit of research I found out Grid isn't currently supported for UiBinding. For those of you in the 2.0 world how have you been handling tabular layout?

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  • Javascript Prototyping Question

    - by Nick Lowman
    I'm just reading about Prototypes in JavaScript and Douglas Crockford offers and excellent way to select a new objects prototype but can anyone explain (below) why obj01's type equals 'object' when I pass it in function as it's prototype? if (typeof Object.beget !== 'function') { Object.beget = function (o) { console.log(typeof o);//function var F = function () {}; F.prototype = o; console.log(typeof F);//function return new F(); }; } var func01 = function(){}; var obj01 = Object.beget(func01); console.log(typeof obj01);//object console.log(typeof obj01.prototype);//object I thought it would be console.log(typeof obj01);//function console.log(typeof obj01.prototype);//function

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  • How many developers are there in the world?

    - by Nick Hodges
    What is the total number of software developers in the world? And to respond to the inevitable "How do you define a software developer?" -- I'll answer two ways: Define it as "Anyone who writes code to make a computer do something he wants done". Define it however you like and then answer the question References to studies or more authoritative sources of information would be greatly appreciated.

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