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• python writing a list to a file

  - by gfar90

  I need to write a list to a file in python. I know the list should be converted to a string with the join method, but since I have a tuple I got confused. I tried a lot to change my variables to strings etc, this is one of my first attempts: def perform(text): repository = [("","")] fdist = nltk.FreqDist(some_variable) for c in some_variable: repository.append((c, fdist[c])) return ' '.join(repository) but it gives me the following error: Traceback (most recent call last): File "", line 1, in qe = perform(entfile2) File "", line 14, in perform return ' '.join(repository) TypeError: sequence item 0: expected string, tuple found any ideas how to write the list 'repository' to a file? Thanks!

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• C# wrapper of c++ dll; "Run-Time Check Failure #0 - The value of ESP was not properly saved across a

  - by Deveti Putnik

  Here is the code in C++ dll: extern "C" _declspec(dllexport) int testDelegate(int (*addFunction)(int, int), int a, int b) { int res = addFunction(a, b); return res; } and here is the code in C#: public delegate int AddIntegersDelegate(int number1, int number2); public static int AddIntegers(int a, int b) { return a + b; } [DllImport("tester.dll", SetLastError = true)] public static extern int testDelegate(AddIntegersDelegate callBackProc, int a, int b); public static void Main(string[] args) { int result = testDelegate(AddIntegers, 4, 5); Console.WriteLine("Code returned:" + result.ToString()); } When I start this small app, I get the message from the header of this post. Can someone help, please? Thanks in advance, D

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• Converting java language output to Joomla language output

  - by jax

  in java if I run : Locale.getDefault().toString() I get zh_tw I am sending this to a joomla site and setting the language like this: $lang = &JFactory::getLanguage(); $lang->setLanguage( $_GET['lang'] ); $lang->load(); however the site requires the following format zh-TW It appears that if it is not in that exact format the language will not change. Is there a function somewhere in java or php that will convert the format for me? I realise that I could write the method myself like this: public static String convertLanguageToJoomlaFormat(String lang) { String[] parts = lang.split("_"); if(parts.length ==2) return parts[0]+"-"+parts[1].toUpperCase(); return lang; } but am unsure if there are any cases where the format changes for particular languages.

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• asp.net mvc 2 multithread

  - by Chris Cap

  I'm getting some weird behavior in asp.net MVC2 (at least it's not what I'm expecting). I have a controller httppost action that processes credit cards. I'm setting a session variable on the server to let me know if a user has attempted to process a card. I clear that session variable when I'm done. I am doing some very quick posts to test the process and the session variable is coming back null everytime because I clear the session variable at the end of the process. I have some debug prints that show me that the all requests are processed synchronously. That is...the first attempt occurs, it fails, session variable is cleared, second attempt tries and fails and the variable is cleared, etc... My first thought was that this was a side effect of debugging and that it just lined requests up for debugging purposes using the local webserver. So I put it on a development server and the same thing is occurring. Multiple submits/posts are processed synchronously. I even put a System.Threading.Sleep in there to make sure it would stop right after I set the session variable and it still won't even START the second request until the first is done. Has anyone else seen this behavior? My understanding was that a worker process was spawned for each request and that these actions could happen asychronously. Here's some psuedo code if (Session["CardCharged"] != null) return RedirectToAction("Index", "Problem"); Session["CardCharged"] = false; //starting the process System.Threading.Thread.Sleep(10000); //charge card here if (!providerResponse.IsApproved) { System.Diagnostics.Debug.WriteLine("failed"); Session["CardCharged"] = null; //have to allow them to charge again since this failed return View(myModel); } Session["CardCharged"] = true; return RedirectToAction("Index", "OrderComplete"); I should mention that my code ALWAYS fails the credit card check for testing purposes. I'm trying to test the situation where processing is STILL occurring and redirect the user elsewhere. I have set a dummy session variable elsewhere to assure that the session id "sticks". So I know the session id is the same for each request. Thanks

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• What is the best way to handle dynamic content_type in Sinatra

  - by lusis

  I'm currently doing the following but it feels "kludgy": module Sinatra module DynFormat def dform(data,ct) if ct == 'xml';return data.to_xml;end if ct == 'json';return data.to_json;end end end helpers DynFormat end My goal is to plan ahead. Right now we're only working with XML for this particular web service but we want to move over to JSON as soon as all the components in our stack support it. Here's a sample route: get '/api/people/named/:name/:format' do format = params[:format] h = {'xml' => 'text/xml','json' => 'application/json'} content_type h[format], :charset => 'utf-8' person = params[:name] salesperson = Salespeople.find(:all, :conditions => ['name LIKE ?', "%#{person}%"]) "#{dform(salesperson,format)}" end It just feels like I'm not doing it the best way possible.

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• how to avoid repeating code?

  - by helloWorld

  I have some technical question, I have repeating code in my work, and I want to get rid of it, so I know that in C++ it is not good idea to use macro, but instead I must use inline function, is it good idea to use this function as inline: list<Data>::iterator foo(int data){ if(dataExists(data)){ list<Data>::iterator i; for(i = Data.begin(); i != Data.end(); ++i){ if(i->getData() == data){ break; } return i; //here I have one more problem, what can I return if data doesn't exist? } I'm beginner, and I think that this function is very unsafe, can somebody please give me advice, how can I improve my code, thanks in advance P.S. what usually do You use to avoid repeating code?

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• Why does Java ArrayList use per-element casting instead of per-array casting?

  - by user1111929

  What happens inside Java's ArrayList<T> (and probably many other classes) is that there is an internal Object[] array = new Object[n];, to which T Objects are written. Whenever an element is read from it, a cast return (T) array[i]; is done. So, a cast on every single read. I wonder why this is done. To me, it seems like they're just doing unnecessary casts. Wouldn't it be more logical and also slightly faster to just create a T[] array = (T[]) new Object[n]; and then just return array[i]; without cast? This is only one cast per array creation, which is usually far less than the number of reads. Why is their method to be preferred? I fail to see why my idea isn't strictly better?

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• Class design question (Disposable and singleton behavior)

  - by user137348

  The Repository class has singleton behavior and the _db implements the disposable pattern. As excepted the _db object gets disposed after the first call and because of the singleton behavior any other call of _db will crash. [ServiceBehavior(InstanceContextMode=InstanceContextMode.Single)] public class Repository : IRepository { private readonly DataBase _db; public Repository(DataBase db) { _db = db; } public int GetCount() { using(_db) { return _db.Menus.Count(); } } public Item GetItem(int id) { using(_db) { return _db.Menus.FirstOrDefault(x=>x.Id == id); } } } My question is, is there any way to design this class to work properly without removing the singleton behavior? The Repositoryclass will be serving big amount of requests.

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• controling a float value with javascript

  - by kawtousse

  Hi, to control my input type and verify that its value is pretty a float in my form i deal with it in javascript like that: function verifierNombre () { var champ=document.getElementById("nperformed"); var str = champ.value; if(str.value==' '){champ.focus();} if (isNaN(str)) { alert("Invalid Valid! the field must be a number"); champ.focus(); return false; } return true; } but it still false because it doesn't accept really floats. so when entering a value like '11,2' the alert is declenched. I want to know how can I control float values with javascript. thanks.

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• linq to sql update data

  - by pranay

  can i update my employee record as given in below function or i have to make query of employee collection first and than i update data public int updateEmployee(App3_EMPLOYEE employee) { DBContextDataContext db = new DBContextDataContext(); db.App3_EMPLOYEEs.Attach(employee); db.SubmitChanges(); return employee.PKEY; } or i have to do this public int updateEmployee(App3_EMPLOYEE employee) { DBContextDataContext db = new DBContextDataContext(); App3_EMPLOYEE emp = db.App3_EMPLOYEEs.Single(e => e.PKEY == employee.PKEY); db.App3_EMPLOYEEs.Attach(employee,emp); db.SubmitChanges(); return employee.PKEY; } But i dont want to use second option is there any efficient way to update data

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• Passing URIs as URL arguments in Drupal 6

  - by wynz

  I'm running into problems trying to pass absolute URIs as parameters with clean URLs enabled. I've got hook_menu() set up like this: function mymodule_menu() { return array( 'page/%' = array( 'title' = 'DBpedia Display Test', 'page callback' = 'mymodule_dbpedia_display', 'page arguments' = array(1), ), ); } and in the page callback: function mymodule_dbpedia_display($uri) { // Make an HTTP request for this URI // and then render some things return $output; } What I'm hoping to do is somehow pass full URIs (e.g. "http://dbpedia.org/resource/Coffee") to my page callback. I've tried a few things and nothing's worked so far... http://mysite.com/page/http%3A%2F%2Fdbpedia.org%2Fresource%2FCoffee Completely breaks Drupal's rewriting http://mysite.com/page/?uri=http%3A%2F%2Fdbpedia.org%2Fresource%2FCoffee Gives a 404 http://mysite.com/page/http://dbpedia.org/resource/Coffee Returns just "http:", which makes sense I could probably use $_GET to pull out the whole query string, but I guess I'm hoping for a more 'Drupal' solution. Any suggestions?

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• .htaccess trickery multi-language website

  - by user1658741

  I have a website right now that uses two languages (french and english) The way it works right now is that if someone goes to mysite.com/folder/file.php for example, file.php is simply a script that figures out which language to use, get's it's own path and filename(file.php) and serves up mysite.com/en/folder/file.php (if the language is english). However what shows up in the URL is still mysite.com/folder/file.php. For any folder and any file the same script is used. If I want to add a new file I have to add the file to the folder the user types into the browser as well to the en and fr folders. Could I do some .htaccess trickery so that whatever URL is typed, one .php file gets open that checks the language and what folder/file was requested and then serves up the correct language file? here's the php file that is served up for any files in the URL. <?php // Get current document path which is mirrored in the language folders $docpath = $_SERVER['PHP_SELF']; // Get current document name (Used when switching languages so that the same current page is shown when language is changed) $docname = GetDocName(); //call up lang.php which handles display of appropriate language webpage. //lang.php uses $docpath and $docname to give out the proper $langfile. //$docpath/$docname is mirrored in the /lang/en and /lang/fr folders $langfile = GetDocRoot()."/lang/lang.php"; include("$langfile"); //Call up the proper language file to display function GetDocRoot() { $temp = getenv("SCRIPT_NAME"); $localpath=realpath(basename(getenv("SCRIPT_NAME"))); $localpath=str_replace("\\","/",$localpath); $docroot=substr($localpath,0, strpos($localpath,$temp)); return $docroot; } function GetDocName() { $currentFile = $_SERVER["SCRIPT_NAME"]; $parts = Explode('/', $currentFile); $dn = $parts[count($parts) - 1]; return $dn; } ?>

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• How to compare two lists with duplicated items in one list?

  - by eladc

  I need to compare list_a against many others. my problem starts when there's a duplicated item in the other lists (two k's in other_b). my goal is to filter out all the lists with the same items (up to three matching items). list_a = ['j','k','a','7'] other_b = ['k', 'j', 'k', 'q'] other_c = ['k','k','9','k'] >>>filter(lambda x: not x in list_a,other_b) ['q'] I need a way that would return ['k', 'q'], because 'k' appears only once in list_a. comparing list_a and other_c with set() isn't good for my purpose since it will return only one element: k. while I need ['k','9','k'] I hope I was clear enough. Thank you

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• How do I guarantee row uniqueness in MySQL without the use of a UNIQUE constraint?

  - by MalcomTucker

  Hi I have some fairly simple requirements but I'm not sure how I implement them: I have multiple concurrent threads running the same query The query supplies a 'string' value - if it exists in the table, the query should return the id of the matching row, if not the query should insert the 'string' value and return the last inserted id The 'string' column is (and must be) a text column (it's bigger than varchar 255) so I cannot set it as unique - uniqueness must be enforced through the access mechanism The query needs to be in stored procedure format (which doesnt support table locks in MySQL) How can I guarantee that 'string' is unique? How can I prevent other threads writing to the table after another thread has read it and found no matching 'string' item? Thanks for any advice..

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• python [lxml] - cleaning out html tags

  - by sadhu_

  from lxml.html.clean import clean_html, Cleaner def clean(text): try: cleaner = Cleaner(scripts=True, embedded=True, meta=True, page_structure=True, links=True, style=True, remove_tags = ['a', 'li', 'td']) print (len(cleaner.clean_html(text))- len(text)) return cleaner.clean_html(text) except: print 'Error in clean_html' print sys.exc_info() return text I put together the above (ugly) code as my initial forays into python land. I'm trying to use lxml cleaner to clean out a couple of html pages, so in the end i am just left with the text and nothing else - but try as i might, the above doesnt appear to work as such, i'm still left with a substial amount of markup (and it doesnt appear to be broken html), and particularly links, which aren't getting removed, despite the args i use in remove_tags and links=True any idea whats going on, perhaps im barking up the wrong tree with lxml ? i thought this was the way to go with html parsing in python?

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• Is throwing an exception a healthy way to exit?

  - by ramaseshan

  I have a setup that looks like this. class Checker { // member data Results m_results; // see below public: bool Check(); private: bool Check1(); bool Check2(); // .. so on }; Checker is a class that performs lengthy check computations for engineering analysis. Each type of check has a resultant double that the checker stores. (see below) bool Checker::Check() { // initilisations etc. Check1(); Check2(); // ... so on } A typical Check function would look like this: bool Checker::Check1() { double result; // lots of code m_results.SetCheck1Result(result); } And the results class looks something like this: class Results { double m_check1Result; double m_check2Result; // ... public: void SetCheck1Result(double d); double GetOverallResult() { return max(m_check1Result, m_check2Result, ...); } }; Note: all code is oversimplified. The Checker and Result classes were initially written to perform all checks and return an overall double result. There is now a new requirement where I only need to know if any of the results exceeds 1. If it does, subsequent checks need not be carried out(it's an optimisation). To achieve this, I could either: Modify every CheckN function to keep check for result and return. The parent Check function would keep checking m_results. OR In the Results::SetCheckNResults(), throw an exception if the value exceeds 1 and catch it at the end of Checker::Check(). The first is tedious, error prone and sub-optimal because every CheckN function further branches out into sub-checks etc. The second is non-intrusive and quick. One disadvantage is I can think of is that the Checker code may not necessarily be exception-safe(although there is no other exception being thrown anywhere else). Is there anything else that's obvious that I'm overlooking? What about the cost of throwing exceptions and stack unwinding? Is there a better 3rd option?

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• Flex 1009 error Chart datatip

  - by JMcNally

  I am simply trying to hide a datatip on a chart if the hit data item (yfield item) is == 101 for two differnt series an areaseries and a line series. The following funciton works in IE but throws an error in firefox. I am new to flex and was wondering if there is a better way to approch this.. the code in // is causing the error. public function datatip_M_chart(e:HitData):String { //if (e.item.STUB == 101) {e.chartItem.itemRenderer.alpha = 0}// if (e.chartItem is AreaSeriesItem){ return'<b>'+COMBO.selectedLabel+'</b>'+ '<br/><i>Age: </i>' + e.item.STUB + '<br/><i>Percentage:</i> ' + e.item.M_PROP+'%'; }else{ return'<b>'+COMBO2.selectedLabel+'</b>'+ '<br/><i>Age: </i>' + e.item.STUB + '<br/><i>Percentage:</i> ' + e.item.M_PROP+'%'; }

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• trouble with a javascript Cannot read property 'value' of

  - by Stanislas Piotrowski

  I've done a function but I do not understand why, a part of it does not work. Actualy I use the methode using className and Id. Here is the part of the code: var items = new Array(); var itemCount = document.getElementsByClassName("items"); for(var i = 0; i < itemCount.length; i++) { items[i] = document.getElementById("p"+(i+1)).value; } return items; } And in jsfiddle the html part that show that this Id exist. So it should not return to me this errors: Uncaught TypeError: Cannot read property 'value' of null fiddle.jshell.net:402 the concerned line is the following: items[i] = document.getElementById("p"+(i+1)).value; http://jsfiddle.net/Wt4qd/ Kind Regards SP.

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• Cross-referencing UML models in VS 2010

  - by cheaster

  I am just starting to explore/use the UML modeling support in Visual Studio 2010 Umltimate. I have created two model projects within a single solution. Let's call them Model A and Model B. I have some data types (classes) defined in Model B. I want to use them as return types for operations in Model A. However, I cannot figure out how to make the types defined in Model B show up in Model A when attempting to set return type on an operation. Any help/suggestions would be greatly appreciated! Thanks!

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• expecte ')' before className

  - by Akbarbuneri

  Hi I have a class DataObject as Header ::: #import <Foundation/Foundation.h> @interface DataObject : NSObject { NSString *erorrMessage; BOOL hasError; NSDictionary *dataValues; } @property(nonatomic, retain)NSString *erorrMessage; @property(nonatomic)BOOL hasError; @property(nonatomic, retain)NSDictionary *dataValues; @end Class Implementation:::: #import "DataObject.h" @implementation DataObject @synthesize erorrMessage; @synthesize hasError; @synthesize dataValues; @end And I have another class as DataManager Header as :::: #import <Foundation/Foundation.h> @interface DataManager : NSObject - (DataObject *)getData :(NSString*)url; @end Implementation :::: #import "DataManager.h" #import "DataObject.h" #import "JSON.h" @implementation DataManager - (DataObject *)getData :(NSString*)url{ DataObject* dataObject = [[DataObject alloc]init]; NSString *urlString = [NSString stringWithFormat:url]; NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:urlString]]; //TODO: Here we have to check the internet connection before requesting. NSError * erorrOnRequesting; NSData *data = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:&erorrOnRequesting]; NSString* responseString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]; if( erorrOnRequesting != nil) { dataObject.hasError = YES; dataObject.erorrMessage = @"Error on requsting to the web server"; return dataObject; } NSError *errorOnParsing; SBJSON *json = [[SBJSON new] autorelease]; NSDictionary *dataValues = [json objectWithString:responseString error:&errorOnParsing]; [responseString release]; if(errorOnParsing != nil) { //TODO: We have to send the website a feedback that there is some problem on the server end. dataObject.hasError = YES; dataObject.erorrMessage = @"Error on parsing, the server returned invalid data."; return dataObject; } dataObject.hasError = NO; dataObject.dataValues = dataValues; return dataObject; } @end Now when I build I got an error in the DataManager header where I #import Dataobject header, it says "error: expected')' before DataObject" I don;t understand what I miss. Thanks for the help..

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• How to fix a warning message associated with strlen() used in Yacc?

  - by user547894

  Hello! Please i need your help. Basically, I am facing this warning message upon compiling with gcc, and am not able to deduce the error: Here are the details: The warning message i am receiving is literrally as follows: y.tab.c: In function ‘yyparse’: y.tab.c:1317 warning: incompatible implicit declaration of built-in function ‘strlen’ My Lex File looks like: %{ #include <stdio.h> #include <stdlib.h> #include <ctype.h> #include "y.tab.h" void yyerror(const char*); char *ptrStr; %} %START nameState %% "Name:" { BEGIN nameState; } <nameState>.+ { ptrStr = (char *)calloc(strlen(yytext)+1, sizeof(char)); strcpy(ptrStr, yytext); yylval.sValue = ptrStr; return sText; } %% int main(int argc, char *argv[]) { if ( argc < 3 ) { printf("Two args are needed: input and output"); } else { yyin = fopen(argv[1], "r"); yyout = fopen(argv[2], "w"); yyparse(); fclose(yyin); fclose(yyout); } return 0; } My Yacc file is as follows: %{ #include <stdio.h> #include <stdlib.h> #include <ctype.h> #include "y.tab.h" void yyerror(const char*); int yywrap(); extern FILE *yyout; %} %union { int iValue; char* sValue; }; %token <sValue> sText %token nameToken %% StartName: /* for empty */ | sName ; sName: sText { fprintf(yyout, "The Name is: %s", $1); fprintf(yyout, "The Length of the Name is: %d", strlen($1)); } ; %% void yyerror(const char *str) { fprintf(stderr,"error: %s\n",str); } int yywrap() { return 1; } *I was wondering how to remove this warning message. Please any suggestions are highly appreciated! Thanks in advance.

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• how to kill an older jsonp request?

  - by pfg

  I have a cross-domain long polling request using getJSON with a callback that looks something like this: $.getJSON("http://long-polling.com/some.fcgi?jsoncallback=?" function(data){ if(data.items[0].rval == 1) { // update data in page } }); The problem is the request to the long-polling service might take a while to return, and another getJSON request might be made in the meantime and update the page even though it is a stale response. Req1: h**p://long-polling.com/some.fcgi at 10:00 AM Req2: h**p://long-polling.com/some.fcgi? at 10:01 AM Req1 returns and updates the data on the page 10:02 AM I want a way to invalidate the return from Req1 if Req2 has already been made. Thanks!

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• C#: Object having two constructors: how to limit which properties are set together?

  - by Dr. Zim

  Say you have a Price object that accepts either an (int quantity, decimal price) or a string containing "4/$3.99". Is there a way to limit which properties can be set together? Feel free to correct me in my logic below. The Test: A and B are equal to each other, but the C example should not be allowed. Thus the question How to enforce that all three parameters are not invoked as in the C example? AdPrice A = new AdPrice { priceText = "4/$3.99"}; // Valid AdPrice B = new AdPrice { qty = 4, price = 3.99m}; // Valid AdPrice C = new AdPrice { qty = 4, priceText = "2/$1.99", price = 3.99m};// Not The class: public class AdPrice { private int _qty; private decimal _price; private string _priceText; The constructors: public AdPrice () : this( qty: 0, price: 0.0m) {} // Default Constructor public AdPrice (int qty = 0, decimal price = 0.0m) { // Numbers only this.qty = qty; this.price = price; } public AdPrice (string priceText = "0/$0.00") { // String only this.priceText = priceText; } The Methods: private void SetPriceValues() { var matches = Regex.Match(_priceText, @"^\s?((?<qty>\d+)\s?/)?\s?[$]?\s?(?<price>[0-9]?\.?[0-9]?[0-9]?)"); if( matches.Success) { if (!Decimal.TryParse(matches.Groups["price"].Value, out this._price)) this._price = 0.0m; if (!Int32.TryParse(matches.Groups["qty"].Value, out this._qty)) this._qty = (this._price > 0 ? 1 : 0); else if (this._price > 0 && this._qty == 0) this._qty = 1; } } private void SetPriceString() { this._priceText = (this._qty > 1 ? this._qty.ToString() + '/' : "") + String.Format("{0:C}",this.price); } The Accessors: public int qty { get { return this._qty; } set { this._qty = value; this.SetPriceString(); } } public decimal price { get { return this._price; } set { this._price = value; this.SetPriceString(); } } public string priceText { get { return this._priceText; } set { this._priceText = value; this.SetPriceValues(); } } }

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• Where should we manage session objects in an ASP.NET application?

  - by Kumar

  I am developing a 3-tired ASP.NET C# web application and was wondering where should the sessions be managed. I have a SessionManager class as follows: public sealed class SessionManager { private const string USER = "User"; private SessionManager() { } public static SessionManager Instance { get { return _instance; } } public User User { get { return HttpContext.Current.Session[USER] as User; } set { HttpContext.Current.Session[USER] = value; } } } Now should the session information be managed in the Business Logic Layer or should it be managed in the Presentation Layer?

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• averaging matrix efficiently

  - by user248237

  in Python, given an n x p matrix, e.g. 4 x 4, how can I return a matrix that's 4 x 2 that simply averages the first two columns and the last two columns for all 4 rows of the matrix? e.g. given: a = array([[1, 2, 3, 4], [5, 6, 7, 8], [9, 10, 11, 12], [13, 14, 15, 16]]) return a matrix that has the average of a[:, 0] and a[:, 1] and the average of a[:, 2] and a[:, 3]. I want this to work for an arbitrary matrix of n x p assuming that the number of columns I am averaging of n is obviously evenly divisible by n. let me clarify: for each row, I want to take the average of the first two columns, then the average of the last two columns. So it would be: 1 + 2 / 2, 3 + 4 / 2 <- row 1 of new matrix 5 + 6 / 2, 7 + 8 / 2 <- row 2 of new matrix, etc. which should yield a 4 by 2 matrix rather than 4 x 4. thanks.

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