undefined

问题 I have something like this. This is my Controller. new singleton('User', function(model){ model.find({username:data.username, password:_pass}, function(err,user){ if (user.length==1) { socket.set('taxiId',user[0].id); cb(true); } else cb(false); }); }); If I set socket property like socket.set('name',value, function(){cb}); I get undefined here auth.authentificate(data, socket, function(logged){ if (logged) { logs.login(data,socket); console.log(socket.taxiId); socket.emit('authOk',{err:

问题 After searching many hours i dont find a solution for my problem: function pseudoclass(Value){ this.Value = Value; } aPlayGround = new Array(); aPlayGround[0] = new pseudoclass(0); var Actual = 0; var Width = 1; var bBool = new Boolean(Actual%Width); //left becomes 0%1 ----> false if (bBool && (aPlayGround[Actual-1].Value < 9)) {} if i let my browser execute this codeblock i get this error message via mozilla firebug: "TypeError: aPlayGround[(Actual - 1)] is undefined" bBool is my error

问题 I'm having a problem with my Mail class. It was working before, but now i'm not sure what happened. here is the error: Fatal error: Call to undefined method Mail::sendTo() in C:\...\web\modules\register.php on line 30 My mail class: class Mail { public static $Headers = 'From:akshay@myemail.com'; public $sendtowho; public $subject; public $message; public $template; public function sendTo($who='') { $this->sendtowho = $who; } public function with($subj='',$template) { $this->subject = $subj;

问题 This question already has answers here : “Notice: Undefined variable”, “Notice: Undefined index”, and “Notice: Undefined offset” using PHP (28 answers) Closed 2 years ago . I'm continually getting the above error when importing data from csv using the following code: $csv_data=file_get_contents("data3_received.csv"); foreach(preg_split("/((\r?\n)|(\r\n?))/", $csv_data) as $line){ list($service_id, $ki3) = explode(',', $line,2); The data imports as expected but the error log is filling up as

问题 I am trying to use class inheritance. I have taken a code from a book and tweaked it a bit to create Class Mammal and a Class Dog which inherits Mammal member data. The code is: #include<iostream> enum BREED{Labrador,Alcetian,Bull,Dalmetian,Pomerarian}; class Mammal{ public: Mammal(); ~Mammal(){} double getAge(){return age;} void setAge(int newAge){age=newAge;} double getWeight(){return weight;} void setWeight(double newWeight){weight=newWeight;} void speak(){std::cout<<"Mammal sound!\n";}

问题 I want to debug a program I wrote. Therefor I'd like to link it using "-g -O0". When I compile (using autotools Makefile) using make CXXFLAGS='-g -O0' I get some errors: libtool: link: g++ -O2 -g -O0 -I/opt/adolc-2.2.1/include -o oc_poly oc_poly-oc_poly.o oc_poly-oc_p2p.o -L/opt/ipopt-3.9.3/lib/coin -L/opt/ipopt-3.9.3/lib/coin/ThirdParty -L/usr/lib/i386-linux-gnu/gcc/i686-linux-gnu/4.5.2 -L/usr/lib/i386-linux-gnu/gcc/i686- linux-gnu/4.5.2/../../.. -L/usr/lib/i386-linux-gnu /opt/ipopt-3.9.3

问题 <p:galleria id="gal" value="#{homeBean.images}" var="image" panelWidth="600" panelHeight="300" > <p:graphicImage value="#{image.imagePath}" width="600" height="300" /> </p:galleria> Problem: Uncaught TypeError: undefined is not a function galleria.js?ln=primefaces&v=4.0:1 And no preview, nothing - like it doesn't exist. But in the source code it does exist. The generated source code is : <div id="gal" class="ui-galleria ui-widget ui-widget-content ui-corner-all"> <ul class="ui-galleria-panel

问题 I'm a beginner to c++ and JNI and I want to call a Java methode from my C++ program. When compiling (with Eclipse) I get the following error: undefined reference to '_imp__JNI_CreateJavaVM@12' I searched for this problem and came across this post There the answer was, if I get that right, including the jvm library to the compiling command. Since I'm not compiling by hand I'm not sure how I can make Eclipse do this. Could somebody explain that step by step for a complete beginner? Here is the

问题 I am having trouble getting the image upload feature to work on the code below with the following error meesage: 'An error occurred in script '/database.php' on line 135: Undefined index: image' which is this part: 'if (is_uploaded_file ($_FILES ['image']['tmp_name'])) {' I've done a few php/mysql forms before but this is the first time I've tried to use image uploads. If possible I'm after a form that allows pdfs and jpegs only and limits the upload to 1.5 meg. The rest of the form works ok,

问题 When the function call below gets run it returns this error. "Uncaught TypeError: Cannot read property 'backgroundColor' of undefined" I am trying to change the background color of a class called .jumbotron. I have tried everything I can thing of so far. Could anyone tell me why this is happening? clrElementJumbo("cornsilk"); function clrElementJumbo(scolor) { var el = document.getElementsByClassName("jumbotron"); el.style.backgroundColor = scolor; } 回答1: Try to replace the code var el =