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问题 I have a problem with JavaScript running in Firefox. The script below runs without a problem in other browsers except Firefox. var vars = [], hash; var hashes = window.location.href.slice(window.location.href.indexOf('?') + 1).split('&'); for(var i = 0; i < hashes.length; i++) { hash = hashes[i].split('='); vars.push(hash[0]); vars[hash[i]] = hash[1]; } if (vars[0] != ' ') { document.all['companyURL'].innerHTML = vars[0]; document.getElementById('domain').value = vars[0]; } So this code runs

问题 I've sourced jQuery, the jQuery Cookie Plugin, and my own Javascript (in that order) at the end of the body of my page. What I'm unable to grasp is why my cookie won't read when I console.log the cookie, or when I assign it to a variable and console.log the variable. Also, when I open the page in Chrome and look through the Resources>Cookies section, it shows that my page has created no cookies. Also, the problem may have to do with my operating on the file locally. It isn't hosted yet.

问题 Should be straightforward, but when I compile the C++ Hello World code returns a bunch of undefined symbol errors. // my first program in C++ #include <iostream> using namespace std; int main () { cout << "Hello World!"; return 0; } Heres how I compile: Open terminal, cd to the directory, gcc hello.cpp Then I get the errors. Any thoughts? I feel like I may have broken somehting... or I am just missing something really obvious. Any help is greatly appreciated! Heres the errors: Undefined

问题 I just updated tensorflow with pip3 (now to version 1.4.1). After it I am having problems: I have a custom op library that I compile with -D _GLIBCXX_USE_CXX11_ABI=0. The library compiles and links fine. Importing it into tensorflow gives: Traceback (most recent call last): ... File "../x.py", line 29, in <module> lib = tf.load_op_library(_lib_path) File "/home/ilge/.local/lib/python3.5/site-packages/tensorflow/python/framework/load_library.py", line 56, in load_op_library lib_handle = py_tf

问题 I've hit an annoying problem in LaTeX. I've got a tex file of about 1000 lines. I've already got a few figures, but when I try to add another figure, It barfs with: ! Undefined control sequence. <argument> ... \sf@size \z@ \selectfont \@currbox l.937 \begin{figure}[t] If I move the figure to other parts of the file, I can get similar errors on different lines: ! Undefined control sequence. <argument> ... \sf@size \z@ \selectfont \@currbox l.657 \paragraph {A Centering Algorithm} If I comment

问题 when I try to fetch data from table where categories are I get Undefined variable: category error. $posts variable work fine. @if(count($posts)) @foreach($posts as $post) @if($post->category) <div class="{{ $post->category->name }} isotope-item"> <img src="../img/showcase/1.jpg" alt=""> <div class="disp-post"> <span class="icon"></span> <p class="time">{{ $post->updated_at }}</p> <h4>{{ Str::words($post->title, 3) }}</h4> <p>{{ Str::words($post->body, 60) }}</p> <p class="link">{{ HTML:

问题 What is the logic of bitwise operators on undefined??? var x; console.log(x); // undefined console.log(x^7); // 7 console.log(7^x); // 7 console.log(x|7); // 7 console.log(7|x); // 7 console.log(7&x); // 0 console.log(x&7); // 0 console.log(~x); // -1 console.log(x*2); // NaN console.log(x/2); // NaN console.log(x+2); // NaN console.log(x-2); // NaN I can see some sense in NaN. Because undefined -2 is really 'not a number'. But I do not follow any logic on bitwise operators and undefined. 回答1

问题 Can't a compiler warn (even better if it throws errors) when it notices a statement with undefined/unspecified/implementation-defined behaviour? Probably to flag a statement as error, the standard should say so, but it can warn the coder at least. Is there any technical difficulties in implementing such an option? Or is it merely impossible? Reason I got this question is, in statements like a[i] = ++i; won't it be knowing that the code is trying to reference a variable and modifying it in the

问题 I have some PHP code in a project I'm working on that uses PHP's round function. On my localhost, I don't include any quotes around my mode argument, stating it as just PHP_ROUND_HALF_DOWN. However, when pushing to my server I get the error message: Use of undefined constant PHP_ROUND_HALF_DOWN - assumed 'PHP_ROUND_HALF_DOWN' Warning (2): Wrong parameter count for round() [APP/views/helpers/time_left.php, line 14] Now, when I add the single quotes to the mode argument, the first error goes

问题 I have a trouble with angular 2 here. I use service that return promise but when i try to retrive the response i got an error. i was read this this stact question this my code. this is HotelService.ts import { Injectable } from '@angular/core'; import { Http } from '@angular/http'; //rxjs promises cause angular http return observable natively. import 'rxjs/add/operator/toPromise'; @Injectable() export class HotelService { private BASEURL : any = 'http://localhost:8080/hotel/'; constructor