我使用SQLyog创建了一个表.当我向其中插入值时,它会弹出以下错误消息:
Operation not allowed when innodb_forced_recovery > 0.
我的表只包含四列,包括一个主键.以下是我的创建和插入查询:
CREATE TABLE `news` (
`id` int(10) NOT NULL AUTO_INCREMENT,
`title` varchar(100) NOT NULL,
`slug` varchar(100) NOT NULL,
`descr` varchar(100) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=5 DEFAULT CHARSET=latin1
insert into `test`.`news` (`title`, `slug`, `descr`)
values ('titleOne', 'slugOne', 'descOne')
我似乎无法找到在创建后从画布中删除形状或路径的功能.
所以我在2点之间创建了一条贝塞尔曲线
beginPath();
bezierCurveTo();
stroke();
closePath();
如何在画布创建后将其从画布中删除？我需要能够通过toggle()和调用删除功能blur().我确定这个存在的东西......
在此先感谢您的帮助!
如何判断某个元素是否有另一个元素？如果没有,请添加一个新的,然后返回.
我尝试过:
var myel = ($('> div.my', this).length > 0)
? $('> div.my', this)
: $(this).append('<div class="my"></div>').css('opacity', 0);
但即使它创建我的元素,如果它不存在,它不会返回它...
我正在使用Android中的应用程序,我遵循Android 开发者页面中的Codesuggestion
当我输入代码时:
private LeDeviceListAdapter mLeDeviceListAdapter;
它有错误消息:
LeDeviceListAdapter无法解析为某种类型
我该怎么办才能修复这个错误？
我试图在https://github.com/tensorflow/tensorflow/tree/master/tensorflow/g3doc/tutorials/word2vec(在Ubuntu 14.04下安装GPU版本的tensorflow)上运行嵌入示例代码一词,但它返回以下错误消息:
Found and verified text8.zip
Data size 17005207
Most common words (+UNK) [['UNK', 418391], ('the', 1061396), ('of', 593677), ('and', 416629), ('one', 411764)]
Sample data [5239, 3084, 12, 6, 195, 2, 3137, 46, 59, 156]
3084 -> 12
originated -> as
3084 -> 5239
originated -> anarchism
12 -> 3084
as -> originated
12 -> 6
as -> a
6 -> 12
a -> as
6 -> 195
a -> term
195 -> 6
term -> a
195 …所以我只是在玩Spotify的Web API,而我正试图访问我的最佳播放曲目.虽然我遇到了一个问题,但我一直试图解决几个小时,但我找不到答案.
当我尝试反序列化我的响应时,我得到以下错误:
"UTF8"不是受支持的编码名称.有关定义自定义编码的信息,请参阅Encoding.RegisterProvider方法的文档.参数名称:name ContentType中提供的字符集无效.无法使用无效字符集将内容读取为字符串.
ContentType是 application/json; charset=UTF8
有任何想法吗？
这是我的请求代码:
private static HttpClient GetHttpClient()
{
HttpClientHandler handler = new HttpClientHandler() {
AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate
};
var httpClient = new HttpClient(handler);
httpClient.DefaultRequestHeaders.Add("Accept", "application/json");
return httpClient;
}
public async Task<SearchArtistResponse> GetSelfTopAsync(string type, string userName)
{
var httpClient = GetHttpClient();
httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", GetAccessToken(userName));
var sb = new StringBuilder();
sb.Append(ApiUrl);
sb.Append($"/me/top/{type}");
var query = sb.ToString();
var response = await httpClient.GetAsync(query);
var spotifyResponse = JsonConvert.DeserializeObject<SearchArtistResponse>(await response.Content.ReadAsStringAsync());
return spotifyResponse;
}
我有一个MyButton带有为iOS实现的自定义渲染器的可视元素.
共享:
namespace RendererTest
{
public class MyButton: Button
{
public Color BoundaryColor { get; set; }
}
public static class App
{
public static Page GetMainPage()
{
var button = new MyButton { Text = "Click me!", BoundaryColor = Color.Red };
button.Clicked += (sender, e) => (sender as MyButton).BoundaryColor = Color.Blue;
return new ContentPage { Content = button };
}
}
}
iOS版:
[assembly:ExportRenderer(typeof(MyButton), typeof(MyButtonRenderer))]
namespace RendererTest.iOS
{
public class MyButtonRenderer: ButtonRenderer
{
public override void Draw(RectangleF …这是我的代码,显示地图上当前位置的警报和蓝点:
MapName.h
#import <UIKit/UIKit.h>
#import <MapKit/MapKit.h>
#import <CoreLocation/CoreLocation.h>
@interface MapName : UIViewController <MKMapViewDelegate, CLLocationManagerDelegate>
@property (strong, nonatomic) IBOutlet MKMapView *MapName;
@property (strong, nonatomic) CLLocationManager *locationManager;
@end
MapName.m
- (void)viewDidLoad
{
[super viewDidLoad];
self.locationManager = [[CLLocationManager alloc]init];
self.locationManager.delegate = self;
if ([self.locationManager respondsToSelector:@selector(requestWhenInUseAuthorization)]) {
[self.locationManager requestWhenInUseAuthorization];
}
[self.locationManager startUpdatingLocation];
//Center the map
[self gotoLocation];
//Show current position
_MapName.showsUserLocation = YES;
}
我已将密钥NSLocationWhenIsUseUsageDescription作为字符串添加到Info.plist中.我在Xcode上仍然遇到同样的错误.
我只是想在https://code.google.com/p/pybluez/source/browse/trunk/examples/simple/rfcomm-server.py上运行RFCOMM服务器示例
$ python2 rfcomm-server.py
Traceback (most recent call last):
File "rfcomm-server.py", line 20, in <module>
profiles = [ SERIAL_PORT_PROFILE ],
File "/usr/lib/python2.7/site-packages/bluetooth/bluez.py", line 176, in advertise_service
raise BluetoothError (str (e))
bluetooth.btcommon.BluetoothError: (2, 'No such file or directory')
我收到了这个错误.我的代码正在使用Windows,但我无法使用Ubuntu 15.10.
使用thread.setDaemon(True)？将python线程设置为守护进程时有什么区别呢？