我必须缺少一个带头文件的基本概念,因为当我尝试从单独的源文件调用最简单的函数时,我得到一个错误:
main.obj:-1:错误:LNK2019:函数_main中引用的未解析的外部符号"void __cdecl buildDeck(int,int)"(？buildDeck @@ YAXHH @ Z)
加入deck.h
#ifndef DECK_H
#define DECK_H
#include <QString>
void buildDeck(int deckSize, int jokers);
struct card
{
QString suit;
QString color;
int rank;
};
#endif // DECK_H
deck.cpp
#include"mainwindow.h"
#include "deck.h"
void buildDeck(int deckSize, int jokers)
{
int blackRed = deckSize-=jokers;
}
main.cpp中
#include "mainwindow.h"
#include "deck.h"
#include <QApplication>
#include <QPushButton>
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
MainWindow w;
w.show();
buildDeck(10,20);
return a.exec();
}
这给了我一个错误.但是,如果我将函数定义从deck.cpp移动到main.cpp的底部,那么应用程序将构建.
所有文件都包含在同一个项目中,并存储在同一目录中.
其他文件:
.pro文件
QT += core …<input type="checkbox" name="Type[]" value="Red" checked="checked" /><span class="space-right">Red</span>
正确设置复选框以在firefox和safari中检查但不是chrome.在网上找不到任何关于此的信息.
有人知道怎么修这个东西吗？
也试过裸体checked以及checked="true"
不是寻找js解决方案,谢谢.
编辑:下面的taco答案描述了问题所在.使用表单和输入元素时,元素必须正确嵌套在<td></td>标记中,否则checked="checked"无效.这是一个jsfiddle的例子,在chrome 29.0.1547.57上证明这是真的:http://jsfiddle.net/LnL7b/
我知道在stackoverflow中有几个这个问题的实例,但我找不到解决方案.
我正在使用Apache和PHP 5.3运行CentOS
.php脚本给了我这个错误:
Fatal error: Class 'PDO' not found in ...
我跑了phpinfo();,页面上唯一存在"pdo"的地方是"配置命令" '--disable-pdo'行.
我试过,#yum install php-pdo但没有包.
我也试过#pecl install pdo,我最后得到这些错误:
/root/tmp/pear/PDO/pdo_dbh.c: In function 'pdo_stmt_instantiate':
/root/tmp/pear/PDO/pdo_dbh.c:410: error: 'zval' has no member named 'refcount'
/root/tmp/pear/PDO/pdo_dbh.c:411: error: 'zval' has no member named 'is_ref'
/root/tmp/pear/PDO/pdo_dbh.c: In function 'pdo_stmt_construct':
/root/tmp/pear/PDO/pdo_dbh.c:435: error: 'zend_fcall_info' has no member named 'object_pp'
/root/tmp/pear/PDO/pdo_dbh.c:458: error: 'zend_fcall_info_cache' has no member named 'object_pp'
/root/tmp/pear/PDO/pdo_dbh.c: In function 'zim_PDO_setAttribute':
/root/tmp/pear/PDO/pdo_dbh.c:752: error: 'zval' has no member named 'refcount'
/root/tmp/pear/PDO/pdo_dbh.c: …我正在尝试在我的服务器上安装pdflib并收到错误:
configure: error: pdflib.h not found! Check the path passed to --with-pdflib=<PATH>. PATH should be the install prefix directory.
ERROR: /root/tmp/pear/pdflib/configure --with-pdflib=/usr/local' failed
我在终端输入以下内容:
pecl安装pdflib
path to pdflib installation? :
在/ usr /本地
我第一次尝试使用 google API，当我尝试向 gmail API 发出请求时，出现“前提条件检查失败”错误。我使用的是服务帐户授权，而不是 Oauth2 用户同意。我尝试过的事情：
这是来自 Node 客户端库的改编示例，但该示例未使用服务帐户身份验证，因此我无法直接使用该示例。
const path = require('path');
const {google} = require('googleapis');
const gmail = google.gmail('v1');
async function runSample() {
// Obtain user credentials to use for the request
const auth = new google.auth.GoogleAuth({
keyFile: path.resolve(__dirname, 'google-key.json'),
scopes: ['https://www.googleapis.com/auth/gmail.readonly'],
});
google.options({auth});
const res = await gmail.users.messages.list({userId: 'me'}); // have tried with my gsuite email address as well
console.log(res.data);
return …我想用密码保护我的域，因为我只是用它来测试脚本，但我需要允许curl HTTP POST 请求。这可能吗？
当前.htaccess：
#AuthUserFile /home/domain/.htpasswds/.htpasswd
#AuthType Basic
#AuthName "Protected Domain"
#Require valid-user
PHP 卷曲请求
$handle = curl_init('http://wwww.domain.com/cgi/mailScript.php');
curl_setopt($handle, CURLOPT_POST, 1);
curl_setopt($handle, CURLOPT_POSTFIELDS, $serial);
curl_exec($handle);
PHP错误：
Authorization Required
This server could not verify that you are authorized to access the document requested. Either you supplied the wrong credentials (e.g., bad password), or your browser doesn't understand how to supply the credentials required.
Additionally, a 401 Authorization Required error was encountered while trying to use an ErrorDocument to handle the …我以为我完全按照文档进行操作，但我不断收到错误。
Uncaught TypeError: Cannot read property 'fn' of undefined
指向 parsely.js 中的这个函数
$.fn.parsley = function ( option, fn ) {
然后当我单击提交按钮时，控制台显示
Uncaught TypeError: Object [object Object] has no method 'parsley'
这是我的表格
<html>
<head>
<script type="text/javascript" src="../GitProjects/Parsley.js/parsley.js"></script>
<script src="../jquery.js" ></script>
<link href="css/bootstrap.css" rel="stylesheet" />
</head>
<body>
<form id="demo-form" data-validate="parsley">
<label for="fullname">Full Name * :</label>
<input type="text" id="fullname" name="fullname" data-required="true" />
<label for="email">Email * :</label>
<input type="text" id="email" name="email" data-trigger="change" data-required="true" data-type="email" />
<label for="website">Website :</label>
<input type="text" id="website" name="website" data-trigger="change" data-type="url" …这是Qt mainwindow.cpp中自动生成的函数代码.
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
}
这会是一回事吗？
MainWindow::MainWindow(QWidget *parent)
{
QMainWindow = parent;
ui = new Ui::MainWindow;
}
我有2张桌子,Ratings和Recipes.
插入后Ratings我需要找到额定配方的所有评级的平均值,并更新表格中的Rating_Avg列Recipes.
这有效,但我相信它正在更新所有行,Recipes.Rating_Avg当我只需要更新Recipe_No =最近评级的Recipe_No的行.
CREATE TRIGGER `update_avg` AFTER INSERT ON `Ratings`
FOR EACH ROW UPDATE Recipes
SET Rating_Avg = (SELECT AVG(Rating) from Ratings where Ratings.Recipe_No=Recipes.Recipe_No)
我觉得我需要添加一个,WHERE Recipe_No = NEW.Recipe_No但我不知道在哪里添加它.
如果我在mainwindow.cpp中定义函数,该函数可以工作,但是当我在radiobuttons.cpp中定义它并尝试从mainwindow.cpp调用它时,项目将无法编译.
mainwindow.h
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
namespace Ui {
class MainWindow;
}
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
explicit MainWindow(QWidget *parent = 0);
void build_radios(); //this function
~MainWindow();
};
#endif // MAINWINDOW_H
radiobuttons.cpp
#include "mainwindow.h"
#include "ui_mainwindow.h"
void MainWindow::build_radios()
{
//... some code
}
mainwindow.cpp
#include "mainwindow.h"
#include "ui_mainwindow.h"
void MainWindow::radio_buttons(); //error: C2761: 'void MainWindow::build_radios(void)' : member function redeclaration not allowed
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
radio_buttons();
}
我有一系列承诺,第一个从API获取数据,第二个将数据插入数据库.
我试图将数据从第一个承诺传递到第二个承诺,但它是未定义的.
这是我的代码:
var getBalancePromise = function() {
var promise = new Promise(function(resolve, reject) {
poloniexExchange.getBalance({
account: 'all'
}, function(err, response) {
if (err)
console.log(err);
reject(err);
if (!err)
resolve(response); //response is an array
});
}).catch((err) => {
console.log('error');
})
return promise;
};
var updateBalancePromise = function(balanceArray) //balanceArray undefined. This should be the data from the first promise in the chain.
{
var promise = new Promise(function(resolve, reject) {
balanceArray.data.forEach(function(element) {
db.collection('balances').update({
currency: element.currency
}, {
$set: {
amount: element.amount,
shortname: …