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  • Basic class returns onject reference instead of Array

    - by php-b-grader
    I have very basic class: class Customer { protected $id; protected $customer; public function __construct($customer_id) { $this->id = $customer_id; return $this->set_customer(); } protected function set_customer() { $query = mysql_query("SELECT * FROM customer WHERE id = '$this->id'"); $this->customer = mysql_fetch_row($query); return $this->customer; } } $customer = new Customer($order->customer->id); print_r($customer); This is not doing what I want it to but I understand why... $customer returns a reference to the Customer Object... But what I want is the MySQL row array from the mysql_fetch_row() call... What am I missing?

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  • zlib gzgets extremely slow?

    - by monkeyking
    I'm doing stuff related to parsing huge globs of textfiles, and was testing what input method to use. There is not much of a difference using c++ std::ifstreams vs c FILE, According to the documentation of zlib, it supports uncompressed files, and will read the file without decompression. I'm seeing a difference from 12 seconds using non zlib to more than 4 minutes using zlib.h This I've tested doing multiple runs, so its not a disk cache issue. Am I using zlib in some wrong way? thanks #include <zlib.h> #include <cstdio> #include <cstdlib> #include <fstream> #define LENS 1000000 size_t fg(const char *fname){ fprintf(stderr,"\t-> using fgets\n"); FILE *fp =fopen(fname,"r"); size_t nLines =0; char *buffer = new char[LENS]; while(NULL!=fgets(buffer,LENS,fp)) nLines++; fprintf(stderr,"%lu\n",nLines); return nLines; } size_t is(const char *fname){ fprintf(stderr,"\t-> using ifstream\n"); std::ifstream is(fname,std::ios::in); size_t nLines =0; char *buffer = new char[LENS]; while(is. getline(buffer,LENS)) nLines++; fprintf(stderr,"%lu\n",nLines); return nLines; } size_t iz(const char *fname){ fprintf(stderr,"\t-> using zlib\n"); gzFile fp =gzopen(fname,"r"); size_t nLines =0; char *buffer = new char[LENS]; while(0!=gzgets(fp,buffer,LENS)) nLines++; fprintf(stderr,"%lu\n",nLines); return nLines; } int main(int argc,char**argv){ if(atoi(argv[2])==0) fg(argv[1]); if(atoi(argv[2])==1) is(argv[1]); if(atoi(argv[2])==2) iz(argv[1]); }

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  • C strange array behaviour

    - by LukeN
    After learning that both strncmp is not what it seems to be and strlcpy not being available on my operating system (Linux), I figured I could try and write it myself. I found a quote from Ulrich Drepper, the libc maintainer, who posted an alternative to strlcpy using mempcpy. I don't have mempcpy either, but it's behaviour was easy to replicate. First of, this is the testcase I have #include <stdio.h> #include <string.h> #define BSIZE 10 void insp(const char* s, int n) { int i; for (i = 0; i < n; i++) printf("%c ", s[i]); printf("\n"); for (i = 0; i < n; i++) printf("%02X ", s[i]); printf("\n"); return; } int copy_string(char *dest, const char *src, int n) { int r = strlen(memcpy(dest, src, n-1)); dest[r] = 0; return r; } int main() { char b[BSIZE]; memset(b, 0, BSIZE); printf("Buffer size is %d", BSIZE); insp(b, BSIZE); printf("\nFirst copy:\n"); copy_string(b, "First", BSIZE); insp(b, BSIZE); printf("b = '%s'\n", b); printf("\nSecond copy:\n"); copy_string(b, "Second", BSIZE); insp(b, BSIZE); printf("b = '%s'\n", b); return 0; } And this is its result: Buffer size is 10 00 00 00 00 00 00 00 00 00 00 First copy: F i r s t b = 46 69 72 73 74 00 62 20 3D 00 b = 'First' Second copy: S e c o n d 53 65 63 6F 6E 64 00 00 01 00 b = 'Second' You can see in the internal representation (the lines insp() created) that there's some noise mixed in, like the printf() format string in the inspection after the first copy, and a foreign 0x01 in the second copy. The strings are copied intact and it correctly handles too long source strings (let's ignore the possible issue with passing 0 as length to copy_string for now, I'll fix that later). But why are there foreign array contents (from the format string) inside my destination? It's as if the destination was actually RESIZED to match the new length.

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  • Is there a best practice for concatenating MP3 Files, adjusting sample rates to match, while preserving original files?

    - by Scott
    Hello overflow community! Does anyone know if there is a "best practice" to concatenate mp3 files to create new files, while preserving the original files? I am working on a CentOS Linux machine, in command line. I will eventually call the command line from a PHP script. I have been doing research and I have come up with a process that I think could work. It combines general advice from different forums, blogs, and sources like this one. So here I go: Create a temporary folder Loop through files to create a new, converted copy, of file into a "raw" format (which one, I don't know. I didn't know "raw" files existed before too long ago. I could use some suggestions on this) Store the path to the temporary files, in the temporary folder, and then loop through the files to concatenate them and then put the new merged file the final "processed directory" Delete the contents of the temporary file with the temporary raw files inside. Convert the final file from "raw" to mp3 and enjoy the finished result I'm thinking that this course of action might be best because I can't necessarily control the quality of the original "source" mp3s. The only other option I could think of would be to create a script that would perform a similar process upon files being added to the system leaving only the files with the "proper" format and removing the original "erroneous" file. Hopefully you can see that I have put some thought into this and that I'm trying to leverage the collective knowledge of this community to choose the best direction. Perhaps there is a better path that I could take? By concatenate, I mean to join together in sequence to create a new audio file from the "concatenated files."

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  • Iterate set covered by cross-product of ranges in ruby

    - by wilsona
    I figured this answer had been asked before, so I searched, but I couldn't find anything. Granted, there are a ton of Ruby Array questions, so it might be there, just buried. In any case, I'm trying to reduce a cross-product of ranges, returning a sum of all elements of the cross-product that meet some set of conditions. To construct a trivial example, if I have an array like this: [0..1,0..1,0..1] I'd like to iterate over this set: [ [0,0,0], [0,0,1], [0,1,0], [0,1,1], [1,0,0], [1,0,1], [1,1,0], [1,1,1] ] and return a sum based the condition "return 1 if i[0] == 1 and i[2] == 0" (which would give 2). In my contrived example, I could do it like this: br = 0..1 br.reduce(0){|sumx, x| sumx + br.reduce(0){|sumy, y| sumy + br.reduce(0){|sumz, z| sumz + (x == 1 and z == 0 ? 1 : 0) } } } , but in the actual application, the set of ranges might be much larger, and nesting reduces that way would get quite ugly. Is there a better way?

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  • WebServices does not interact with App

    - by daemonfire300
    I got a Silverlight App with-in a Web Project Web Silverlight The web contains a service: [WebService(Namespace = "svChat")] [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)] // To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line. //[System.Web.Script.Services.ScriptService] public class GetIPService : System.Web.Services.WebService { public GetIPService () { //Uncomment the following line if using designed components //InitializeComponent(); } [WebMethod] public string GetIp() { return HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"]; } } And I got a class in my Silverlight App using the Service: public class Client { private string ip; private string created; #region Properties public string Ip { get { return ip; } set { ip = value; } } public string Created { get { return created; } set { created = value; } } #endregion public Client() { } public void SetIp() { ServiceReference1.GetIPServiceSoapClient scIpClient = new svChat.ServiceReference1.GetIPServiceSoapClient(); scIpClient.GetIpCompleted += new EventHandler<svChat.ServiceReference1.GetIpCompletedEventArgs>(IpService_Completed); scIpClient.GetIpAsync(); } private void IpService_Completed(object sender, ServiceReference1.GetIpCompletedEventArgs e) { this.ip = e.Result; } } After Client is created, SetIp() is called, and Client.Ip is added to a text box. Nothing happens. Ip = null. Service itselfs works, tested it. Getting Ip by the above code works. Gettings Ip via service through Silverlight App does not work. <configuration> <system.serviceModel> <bindings> <basicHttpBinding> <binding name="GetIPServiceSoap" maxBufferSize="2147483647" maxReceivedMessageSize="2147483647"> <security mode="None" /> </binding> </basicHttpBinding> </bindings> <client> <endpoint address="http://localhost:2090/svChat.Web/GetIPService.asmx" binding="basicHttpBinding" bindingConfiguration="GetIPServiceSoap" contract="ServiceReference1.GetIPServiceSoap" name="GetIPServiceSoap" /> </client> </system.serviceModel> </configuration> Any ideas? regards,

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  • JavaSript / CSS: Get the size in 'px' instead of percents.

    - by Andrei Ciobanu
    Hello, I have to write a javascript function that is returning the current size (in px) of a div. Unfortunately the div has its weight specified in % instead of px. The style of the div: position: absolute; width: 100%; height: 100%; And my width returning function: function getTableWidth(tableId){ var tabWidth = document.getElementById('pt1::tabb').children[0].children[0].style.width; return tabWidth; } tabWidth is '100%'. Is it possible to return the px width instead of the % width ? NOTE: I don't have access to any html/css , as the page I am working on is generated through a complex framework. I can only embed javascript.

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  • Is it bad practice to change state inside of an if statement?

    - by Benjamin
    I wrote some code that looks similar to the following: String SKIP_FIRST = "foo"; String SKIP_SECOND = "foo/bar"; int skipFooBarIndex(String[] list){ int index; if (list.length >= (index = 1) && list[0].equals(SKIP_FIRST) || list.length >= (index = 2) && (list[0] + "/" + list[1]).equals(SKIP_SECOND)){ return index; } return 0; } String[] myArray = "foo/bar/apples/peaches/cherries".split("/"); print(skipFooBarIndex(myArray); This changes state inside of the if statement by assigning index. However, my coworkers disliked this very much. Is this a harmful practice? Is there any reason to do it?

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  • Jquery .Filter Function Question

    - by Matias
    Hi Guys, This is kindof a simple question, however, I don´t seem to figure out how to do it: I´ve got a slider filtering some stuff $("#price").slider( { range: true, step: 5, change: function(e,ui) { $('total').filter(function(index) { return ( ($("#price").slider("values", 0)) <= $(this).text() <= ($("#price").slider("values", 1))); }).parents('div.item').hide(); } }); Basically, I want an array with index of each of elements which have been filtered so I can reuse them for other purpose. I was thinking of editing filter function to something like: $('total').filter(function(index) { var matches = ( ($("#price").slider("values", 0)) <= $(this).text() <= ($("#price").slider("values", 1))); return matches; }.myFunction(matches){ //do some stuff here with matched elements } This is not correct, your help is greatly appreciated.

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  • JQuery Datepicker Date highlight Issue

    - by Isola Olufemi
    I have an in-line date picker in which I want to highlight some dates based on array of strings from the server side. I found out the on load of the page with the datepicker, events the matches in the current month will not be highlighted. when I click the next month button the events on the next moth will be highlighted. What I discovered that i the matching only get highlighted when I click to the next month and not when I click back to the previous month. Below is my script: var actionCalDates = new Array(); function getDates(month, year) { $.ajax({ url: "/Index/GetAllAlerts", data: { month: month, year: year }, success: function (result) { var date = new Date(); var i = new Number(date.getMonth()); i += 1; actionCalDates = result.split(","); } }); } function getTitle(ar, d) { var result = ""; for (var i = 0; i < ar.length; i++) { if (ar[i].indexOf(d) != -1) { var e = actionCalDates[i].split(";"); result += e[0] + "\n"; } } return result; } $('#calendar').datepicker({ numberOfMonths: [1, 1], showCurrentAtPos: 0, dateFormat: 'dd/mm/y', beforeShowDay: function (thedate) { var theday = thedate.getDate(); var x = new Number(thedate.getMonth()); x += 1; var date = thedate.getDate() + "/" + x + "/" + thedate.getFullYear(); getDates(x, thedate.getFullYear()); for (var i = 0; i < actionCalDates.length; i++) { var entry = actionCalDates[i].split(";"); if (date == entry[1]) { return [true, "highlight", getTitle(actionCalDates, date)]; } } return [true, "", ""]; }, onChangeMonthYear: function (year, month, inst) { getDates(month, year); }, onSelect: function (d, instance) { $.ajax({ url: '/Index/AlertConvertDate', datatype: 'text', data: { dateString: d }, error: function (xhr, ajaxOptions, thrownError) { alert(xhr.statusText); alert(thrownError); }, success: function (data) { window.SetHomeContent(data); } }); } }); Please can someone point out where I went wrong? Thank you all.

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  • Any way to allow classes implementing IEntity and downcast to have operator == comparisons?

    - by George Mauer
    Basically here's the issue. All entities in my system are identified by their type and their id. new Customer() { Id = 1} == new Customer() {Id = 1}; new Customer() { Id = 1} != new Customer() {Id = 2}; new Customer() { Id = 1} != new Product() {Id = 1}; Pretty standard scenario. Since all Entities have an Id I define an interface for all entities. public interface IEntity { int Id { get; set;} } And to simplify creation of entities I make public abstract class BaseEntity<T> : where T : IEntity { int Id { get; set;} public static bool operator ==(BaseEntity<T> e1, BaseEntity<T> e2) { if (object.ReferenceEquals(null, e1)) return false; return e1.Equals(e2); } public static bool operator !=(BaseEntity<T> e1, BaseEntity<T> e2) { return !(e1 == e2); } } where Customer and Product are something like public class Customer : BaseEntity<Customer>, IEntity {} public class Product : BaseEntity<Product>, IEntity {} I think this is hunky dory. I think all I have to do is override Equals in each entity (if I'm super clever, I can even override it only once in the BaseEntity) and everything with work. So now I'm expanding my test coverage and find that its not quite so simple! First of all , when downcasting to IEntity and using == the BaseEntity< override is not used. So what's the solution? Is there something else I can do? If not, this is seriously annoying. Upadate It would seem that there is something wrong with my tests - or rather with comparing on generics. Check this out [Test] public void when_created_manually_non_generic() { // PASSES! var e1 = new Terminal() {Id = 1}; var e2 = new Terminal() {Id = 1}; Assert.IsTrue(e1 == e2); } [Test] public void when_created_manually_generic() { // FAILS! GenericCompare(new Terminal() { Id = 1 }, new Terminal() { Id = 1 }); } private void GenericCompare<T>(T e1, T e2) where T : class, IEntity { Assert.IsTrue(e1 == e2); } Whats going on here? This is not as big a problem as I was afraid, but is still quite annoying and a completely unintuitive way for the language to behave. Update Update Ah I get it, the generic implicitly downcasts to IEntity for some reason. I stand by this being unintuitive and potentially problematic for my Domain's consumers as they need to remember that anything happening within a generic method or class needs to be compared with Equals()

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  • How can I add a field with an array value to my Perl object?

    - by superstar
    What's the difference between these two constructors in perl? 1) sub new { my $class = shift; my $self = {}; $self->{firstName} = undef; $self->{lastName} = undef; $self->{PEERS} = []; bless ($self, $class); return $self; } 2) sub new { my $class = shift; my $self = { _firstName => shift, _lastName => shift, _ssn => shift, }; bless $self, $class; return $self; } I am using the second one so far, but I need to implement the PEERS array in the second one? How do I do it with the second constructor and how can we use get and set methods on those array variables?

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  • zend_application showing blank page

    - by daniel
    Hi, I'm using Zend_Application to bootstrap my app. class Bootstrap extends Zend_Application_Bootstrap_Bootstrap { public static $frontController = null; public static $registry = null; protected function _initEnvironment() { ini_set('display_errors', true); //date_default_timezone_set('Europe/London'); } protected function _initRegistry() { self::$registry = new Zend_Registry(array(), ArrayObject::ARRAY_AS_PROPS); Zend_Registry::setInstance(self::$registry); } protected function _initConfiguration() { $config = new Zend_Config_Ini( BASE_PATH . '/data/server/settings.ini', APPLICATION_ENV ); self::$registry->configuration = $config; } protected function _initLogging() { $config = self::$registry->configuration; $logger = new Zend_Log(new Zend_Log_Writer_Stream($config->logging->file)); Zend_Registry::set('logger', $logger); } protected function _initFrontController() { self::$frontController = Zend_Controller_Front::getInstance(); self::$frontController->throwExceptions(true); self::$frontController->returnResponse(true); self::$frontController->setControllerDirectory( APPLICATION_PATH .'/controllers' ); self::$frontController->setParam('registry', self::$registry); return self::$frontController; } protected function _initView() { $config = self::$registry->configuration; $view = new Zend_View; $viewRenderer = new Zend_Controller_Action_Helper_ViewRenderer($view); Zend_Controller_Action_HelperBroker::addHelper($viewRenderer); Zend_Layout::startMvc( array( 'layoutPath' => APPLICATION_PATH . "/layouts/scripts", 'layout' => "layout" ) ); return $view; } protected function _initDatabase() { $config = self::$registry->configuration; $params = array('host' => $config->database->hostname, 'username' => $config->database->username, 'password' => $config->database->password, 'dbname' => $config->database->database); $db = Zend_Db::factory($config->database->type, $params); Zend_Registry::set('db', $db); } protected function _initPlaceholders() { $view = $this->getResource('View'); $view->doctype('XHTML1_STRICT'); $view->headTitle('Greplin') ->setSeparator(' / '); $view->headLink()->prependStylesheet('/src/css/header.css'); $view->headScript()->prependFile('/js/site.js'); return $view; } } When I run the app I get a blank page. Filenames / paths are intact. If I add die() to the bottom of my layout.phtml, I get the page. Something is resetting the headers and sending a blank page. My error reporting is on and I get unrelated errors. What could this be?! Thanks!

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  • How do I write an overload operator where both arguments are interface

    - by Eric Girard
    I'm using interface for most of my stuff. I can't find a way to create an overload operator + that would allow me to perform an addition on any objects implementing the IPoint interface Code interface IPoint { double X { get; set; } double Y { get; set; } } class Point : IPoint { double X { get; set; } double Y { get; set; } //How and where do I create this operator/extension ??? public static IPoint operator + (IPoint a,IPoint b) { return Add(a,b); } public static IPoint Add(IPoint a,IPoint b) { return new Point { X = a.X + b.X, Y = a.Y + b.Y }; } } //Dumb use case : public class Test { IPoint _currentLocation; public Test(IPoint initialLocation) { _currentLocation = intialLocation } public MoveOf(IPoint movement) { _currentLocation = _currentLocation + intialLocation; //Much cleaner/user-friendly than _currentLocation = Point.Add(_currentLocation,intialLocation); } }

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  • pass php array to jquery with getJSON

    - by robertdd
    i want to pass a php aray to jQuery: $.getimagesarr = function() { $.getJSON('operations.php', {'operation':'getimglist'}, function(data){ var arr = new Array(); arr = data; return arr; }); } var data = $.getimagesarr(); if (data){ jQuery.each(data, function(i, val) { .... }); } it return undefined in php i have this: function getimglist(){ $results = $_SESSION['files']; echo json_encode($results); } it is possible?

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  • what is a root directory in IIS 6 and How do I make one of my subfolder in ASP.NET website the root directory?

    - by R_Coder
    I need to integrate a third party plugin in my asp.net website. To install the plugin, they have mentioned this sentence, "Create an application through your IIS control panel with root directory at -(some path from my website folder)?". I am not much aware with IIS and rarely worked with it. Though I tried every possible way i could do in IIS, I am not able to work it out. After installation, there is a test page provided by plugin which i have to run to check but when I run it, it shows this error. "It is an error to use a section registered as allowDefinition='MachineToApplication' beyond application level. This error can be caused by a virtual directory not being configured as an application in IIS." I searched this error too and found that it is because the two Web.Config file, one from the main project and another from plugin folder. The only way to work with this is to make the plugin folder they specified as root directory in IIS. Someone kindly tell me some easy steps to do this. What I was doing is, in IIS6, I added New website with the main folder of my asp.net website, then I right clickadd application and choosed the gievn path, thought it would become root directory but it ain't. Help would be appreciated. ALso note that, i have to put the plugin folder in my main website folder only. So, there are two web.config. I tried to rename one of them too, it solved the above error but gave another errors but I think main problem is of root directory. P.S they show me above error on web.config file of plugin folder on this sentence- "Line 51: < authentication mode="Windows" />"

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  • disable dates using jquery inside gridview control

    - by bladerunner
    Hi there, I have a gridview which contains a textbox control. I need to show the calendar for the user to pick the date and certain dates are to be disabled using jquery. I found a post on stackoverflow that talked about how to disable certain dates. I am done with that part, except not sure how to pass the textbox control to this jquery function. Here is the code. <script type="text/javascript" language="javascript"> function pageLoad(sender, args) { var enabledDays = ['09/21/2011', '10/05/2011', '10/19/2011', '11/02/2011', '11/16/2011']; /* utility functions */ function editDays(date) { for (var i = 0; i < enabledDays.length; i++) { if (new Date(enabledDays[i]).toString() == date.toString()) { return [true]; } } return [false]; } /* create datepicker */ $(document).ready(function() { $('#<%= txtInHomeDate.ClientID %>').datepicker({ beforeShow: springDate, beforeShowDay: editDays, dateFormat: 'mm/dd/yy', buttonImage: 'images/cal.gif', buttonText: 'Choose date', firstDay: 1, buttonImageOnly: true, showOn: 'both', showAnim: 'fadeIn', onSelect: function() { $(this).trigger("onchange", null); } }); function springDate() { var defaultMin = new Date(); var defaultMax = new Date(); var Min = defaultMin; var Max = defaultMax; // make valid date from hiddenfied value format is MM/dd/yyyy dateMin = $('#<%= hfStDate.ClientID %>').val(); dateMin = new Date(dateMin); dateMax = $('#<%= hfEndDate.ClientID %>').val(); dateMax = new Date(dateMax); if (dateMin && dateMax) { Min = new Date(dateMin.getFullYear(), dateMin.getMonth(), dateMin.getDate()); Max = new Date(dateMax.getFullYear(), dateMax.getMonth(), dateMax.getDate()); } return { minDate: Min, maxDate: Max }; } }); } <.... <asp:TemplateField HeaderText="In-Home Date"> <ItemStyle HorizontalAlign="Center" /> <ItemTemplate> <asp:HiddenField ID="hfStDate" runat="server" Value="09/01/2011" /> <asp:HiddenField ID="hfEndDate" runat="server" Value="11/30/2011" /> <asp:TextBox ID="txtInHomeDate" runat="server" /> </ItemTemplate> </asp:TemplateField> Currently, it errors out since the jquery function won't find the txtInHomeDate. Could I get some help as I am pretty close to get this done? Thanks!!

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  • Function for averages of tuples in a dictionary

    - by Billy Mann
    I have a string, dictionary in the form: ('the head', {'exploded': (3.5, 1.0), 'the': (5.0, 1.0), "puppy's": (9.0, 1.0), 'head': (6.0, 1.0)}) Each parentheses is a tuple which corresponds to (score, standard deviation). I'm taking the average of just the first integer in each tuple. I've tried this: def score(string, d): for word in d: (score, std) = d[word] d[word]=float(score),float(std) if word in string: word = string.lower() number = len(string) return sum([v[0] for v in d.values()]) / float(len(d)) if len(string) == 0: return 0 When I run: print score('the head', {'exploded': (3.5, 1.0), 'the': (5.0, 1.0), "puppy's": (9.0, 1.0), 'head': (6.0, 1.0)}) I should get 5.5 but instead I'm getting 5.875. Can't figure out what in my function is not allowing me to get the correct answer.

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  • Should Factories Persist Entities?

    - by mxmissile
    Should factories persist entities they build? Or is that the job of the caller? Pseudo Example Incoming: public class OrderFactory { public Order Build() { var order = new Order(); .... return order; } } public class OrderController : Controller { public OrderController(IRepository repository) { this.repository = repository; } public ActionResult MyAction() { var order = factory.Build(); repository.Insert(order); ... } } or public class OrderFactory { public OrderFactory(IRepository repository) { this.repository = repository; } public Order Build() { var order = new Order(); ... repository.Insert(order); return order; } } public class OrderController : Controller { public ActionResult MyAction() { var order = factory.Build(); ... } } Is there a recommended practice here?

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  • yet another confusion with multiprocessing error, 'module' object has no attribute 'f'

    - by gatoatigrado
    I know this has been answered before, but it seems that executing the script directly "python filename.py" does not work. I have Python 2.6.2 on SuSE Linux. Code: #!/usr/bin/python # -*- coding: utf-8 -*- from multiprocessing import Pool p = Pool(1) def f(x): return x*x p.map(f, [1, 2, 3]) Command line: > python example.py Process PoolWorker-1: Traceback (most recent call last): File "/usr/lib/python2.6/multiprocessing/process.py", line 231, in _bootstrap self.run() File "/usr/lib/python2.6/multiprocessing/process.py", line 88, in run self._target(*self._args, **self._kwargs) File "/usr/lib/python2.6/multiprocessing/pool.py", line 57, in worker task = get() File "/usr/lib/python2.6/multiprocessing/queues.py", line 339, in get return recv() AttributeError: 'module' object has no attribute 'f'

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  • Writing a managed wrapper for unmanaged (C++) code - custom types/structs

    - by Bobby
    faacEncConfigurationPtr FAACAPI faacEncGetCurrentConfiguration( faacEncHandle hEncoder); I'm trying to come up with a simple wrapper for this C++ library; I've never done more than very simple p/invoke interop before - like one function call with primitive arguments. So, given the above C++ function, for example, what should I do to deal with the return type, and parameter? FAACAPI is defined as: #define FAACAPI __stdcall faacEncConfigurationPtr is defined: typedef struct faacEncConfiguration { int version; char *name; char *copyright; unsigned int mpegVersion; unsigned long bitRate; unsigned int inputFormat; int shortctl; psymodellist_t *psymodellist; int channel_map[64]; } faacEncConfiguration, *faacEncConfigurationPtr; AFAIK this means that the return type of the function is a reference to this struct? And faacEncHandle is: typedef struct { unsigned int numChannels; unsigned long sampleRate; ... SR_INFO *srInfo; double *sampleBuff[MAX_CHANNELS]; ... double *freqBuff[MAX_CHANNELS]; double *overlapBuff[MAX_CHANNELS]; double *msSpectrum[MAX_CHANNELS]; CoderInfo coderInfo[MAX_CHANNELS]; ChannelInfo channelInfo[MAX_CHANNELS]; PsyInfo psyInfo[MAX_CHANNELS]; GlobalPsyInfo gpsyInfo; faacEncConfiguration config; psymodel_t *psymodel; /* quantizer specific config */ AACQuantCfg aacquantCfg; /* FFT Tables */ FFT_Tables fft_tables; int bitDiff; } faacEncStruct, *faacEncHandle; So within that struct we see a lot of other types... hmm. Essentially, I'm trying to figure out how to deal with these types in my managed wrapper? Do I need to create versions of these types/structs, in C#? Something like this: [StructLayout(LayoutKind.Sequential)] struct faacEncConfiguration { uint useTns; ulong bitRate; ... } If so then can the runtime automatically "map" these objects onto eachother? And, would I have to create these "mapped" types for all the types in these return types/parameter type hierarchies, all the way down until I get to all primitives? I know this is a broad topic, any advice on getting up-to-speed quickly on what I need to learn to make this happen would be very much appreciated! Thanks!

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  • How to remove multiple instances and just have one instance while multiple function calls in php ?

    - by Rachel
    public function getHelperInstance() { $user = new Helper(); $user->set($result['data']); return $user; } I am calling getHelper() class multiple times and if $user is not empty than am calling getHelperInstance(), now in my case getHelperInstance() always creates a new instance of Helper() class and so every time I call getHelperInstance() function am creating a new instance of Helper() so is there any way where can I can just create one instance of Helper() and use it multiple times instead of creating a new instance everytime. Any suggestions !!! public function getHelper() { $user = array(); if (!empty($user)) { $user = $this->getHelperInstance(); } return $user; }

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  • Operator Overloading in C++ as int + obj

    - by Azher
    Hi Guys, I have following class:- class myclass { size_t st; myclass(size_t pst) { st=pst; } operator int() { return (int)st; } int operator+(int intojb) { return int(st) + intobj; } }; this works fine as long as I use it like this:- char* src="This is test string"; int i= myclass(strlen(src)) + 100; but I am unable to do this:- int i= 100+ myclass(strlen(src)); Any idea, how can I achieve this?? Thanks in advance. Regards,

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  • SQL to get friends AND friends of friends of a user

    - by Enrique
    My MySQL tables structure is like this. USER int id varchar username FRIEND_LIST int user_id int friend_id For each friend relationship I insert 2 records in FRIEND_LIST. If user 1 is friend of user 2 then the next rows are inserted into FRIEND_LIST 1,2 2,1 I want to get the friends and friends of friends of an specific user. The select should return columns a, b, c. a: user_id b: friend_id c: username (username of friend_id ) If 1 is friend of 2 and 3. 2 is friend of 3, 4 and 5 3 is friend of 5,6,7 Then the query to get 1's friends and friends of friends should return: 1 2 two 1 3 three 2 1 one 2 3 three 2 4 four 2 5 five 3 1 one 3 5 five 3 6 six 3 7 seven Can I get this rows with a single query?

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