undefined

问题 The following code triggers a value error: from pygame import * init() from random import * t = True f = False inventory = [] class block(object): def __init__(self,break_time,break_content,color): self.break_time = break_time self.break_content = break_content self.color = color def brek(self): inventory.append(self.break_content) end = block(1-0,None,(0,0,0)) gem = block(10,"agem",(0,0,100)) stone = block(3,"cobble",(100,100,100)) iron = block(5,"iron_ore",(25,50,100)) dirt = block(2,"dirt"

问题 I know these are everywhere but I can't seem to see the error in my code. I'm making a simple ajax call with datatype json. This call seems to succeed but does not return anything and the alert prints undefined . javascript: jQuery(document).ready(function() { if(jQuery('#statesel').length) { var dataString; dataString = "nonce=" + dynoselect.post_dyno_select_nonce; jQuery.ajax({ type: "POST", url: dynoselect.ajaxurl, dataType: "json", data: dataString, success: function(result) { alert

问题 Hello I have a code that checks for duplicates inside an xml file: XML: <?xml version="1.0"?> <profielen> <profiel> <voornaam>a</voornaam> <achternaam>a</achternaam> <adres>a</adres> <postcode>a</postcode> <plaats>a</plaats> <email>a</email> </profiel> <profiel> <voornaam>b</voornaam> <achternaam>b</achternaam> <adres>b</adres> <postcode>b</postcode> <plaats>b</plaats> <email>b</email> </profiel> <profiel> <voornaam>c</voornaam> <achternaam>c</achternaam> <adres>c</adres> <postcode>c<

问题 We've never gotten this app to run in production. The application runs just fine in dev. I've made sure all rake tasks are up to date and acts_as_authentic is set for the user and everything else that everyone has posted on all the forums. The server has been bounced multiple times. This error comes up every single time on all URLs. Details below: NoMethodError in User_sessions#new Showing app/views/user_sessions/new.html.erb where line #6 raised: undefined method `username' for #<UserSession

问题 I'm relatively new to React and I'm working on a ToDo list style Recipe app. I asked a previous question here about refactoring a functional component so that recipe ingredients would appear on separate lines instead of all appearing as one single line paragraph. I implemented the suggested changes and used a second .map function to iterate through ingredients and successfully got them to appear on separate lines. However, after implementing the changes now I get an error when the user clicks

问题 In my user control to upload files, both the client-side (funClientUploadComplete, funClientUploadError) and server-side event (uplFile1_UploadedComplete) are not getting fired. After some debugging, found out that the client-side event functions were "undefined". They are clearly defined in the HTML below. Why are they still "undefined"? How can they be successfully defined/bound? I suspect this is also the reason for server-side event function not being called. Please see code below.

问题 i have a model named test.rb and when i use @tests=Test.new in my controller i get the following error. Can someone temme how can i resolve this? "undefined method `new' for Test:Module" 回答1: Looks like test is already the name of a module called Test if would seem that you have naming conflict. Try placing your own model in a module ie module MyModule class Test < ActiveRecord::Base end end and then calling it like so @test = MyModule::Test.new 来源： https://stackoverflow.com/questions/974060

问题 I want to update from dojo 1.7 to 1.8.3 so I have to replace the dojo.connect command. switch: < div id="universalPushSwitch" data-dojo-type="dojox.mobile.Switch" style="float:right" class="mblSwRoundShape1"></div> Now I have: dojo.require("dijit/registry"); dojo.require("dojo/ready"); dojo.require("dojox/mobile/ListItem"); dojo.require("dojo/aspect"); dojo.ready(function(){ dojo.aspect.after(dijit.registry.byId("universalPushSwitch"), "onStateChanged", function(newState){ alert(newState); }

问题 I'm using PyV8 and I'd like to call a javascript function with undefined . It seems that evaluating both undefined and null return Python's None value: >>> evaljs("undefined") None >>> evaljs("null") None The problem, of course, is that they're not the same in javascript: >>> evaljs("undefined === null") False False >>> evaljs("undefined") == evaljs("null") None None True Is there any nice way to go about doing this? I'd actually like to write a Python function, callable from javascript,

问题 I have this function wich will translate strings and phrases for other functions and should return an array with the translated parts. When I try to call the function in another function and captcher the returned value, I keep recieving the message that the returned value is undefined. When I don't let the translate function return a value but make her do an alert with the value she should return .. everything goes well. So their is something I do what prevents the function translate() to