有Vec :: push_all,但它标记为不稳定.还有Vec :: append类似,但也不稳定.
目前还有其他选择吗？
以下代码为饼图CorePlot in ios:
CPTGraphHostingView *hostingView = [[CPTGraphHostingView alloc] initWithFrame:self.view.bounds];
[self.view addSubview:hostingView];
graph = [[CPTXYGraph alloc] initWithFrame:self.view.bounds];
hostingView.hostedGraph = graph;
CPTPieChart *pieChart = [[CPTPieChart alloc] init];
pieChart.dataSource = self;
pieChart.pieRadius = 100.0;
pieChart.identifier = @"PieChart1";
pieChart.startAngle = M_PI_4;
pieChart.sliceDirection = CPTPieDirectionCounterClockwise;
self.pieData= [NSMutableArray arrayWithObjects:[NSNumber numberWithDouble:90.0],
[NSNumber numberWithDouble:20.0],
[NSNumber numberWithDouble:30.0],
[NSNumber numberWithDouble:40.0],
[NSNumber numberWithDouble:50.0], [NSNumber numberWithDouble:60.0], nil];
[graph addPlot:pieChart];
[pieChart release];
这是输出不会隐藏饼图中的x和y轴....!我需要隐藏X和y轴......!帮我 ....!
如果可能的话,我怎么能以编程方式编辑Emacs Lisp中的xml数据？
我需要做的是以编程方式将新节点添加到xml中的任意位置:
<root>
<child>
</child>
</root>
(xml-add-element xml "hello" (xml-element-by-tagname xml "child"))
<root>
<child>
<hello></hello>
</child>
</root>
编辑:我得到尽可能解析XML成口齿不清结构和编辑它xml.el和dom.el,但现在我需要把口齿不清结构回XML数据.
我有一个这样的对象数组:
var a = [
{ id: 1, score: 1, isCut: false, dnf: false },
{ id: 2, score: 2, isCut: false, dnf: false },
{ id: 3, score: 3, isCut: false, dnf: false },
{ id: 4, score: 4, isCut: false, dnf: false },
{ id: 5, score: 5, isCut: true, dnf: true },
{ id: 6, score: 6, isCut: true, dnf: false },
{ id: 7, score: 7, isCut: true, dnf: false },
{ id: 8, score: 8, …我正在将Butterknife库添加到我的Android应用程序中.它运行良好的最低Android版本是什么,或者它适用于所有版本的Android？
我需要maphash在找到我要找的东西时提前退出.
(defun find-in-hash (str hash)
(let ((match nil))
(maphash (lambda (key value)
(if (string-prefix-p str key)
(setq match key))) hash)
match))
我将如何在Emacs Lisp中执行此操作？
我试图异步调用服务器（ARC -on）：
NSURLConnection *theConnection=[[NSURLConnection alloc] initWithRequest:request delegate:self];
if (theConnection) {
content = [NSMutableData data];
NSLog(@"responseData from setup.php: %@", content);
} else {
// Inform the user that the connection failed.
NSLog(@"error from server response in set up");
}
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
NSLog(@"connection did receive response");
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
[content appendData:data];
NSLog(@"connection did receive data");
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
NSLog(@"connection did finish load");
NSLog(@"Succeeded! Received %@ bytes of data",receivedData);
}
但是我从服务器获取内容时遇到问题：-在didReceiveData函数中，出现以下错误：-'NSString'没有可见的@interface声明选择器'appendData'
有人可以建议我哪里我错了吗？
我创建了一个Qt接口,添加了Qlabel并将pixmap设置为图像.imagelabel =
new QLabel(centralwidget);
imagelabel->setObjectName(QString::fromUtf8("imagelabel"));
imagelabel->setGeometry(QRect(20, 10, 371, 311));
imagelabel->setPixmap(QPixmap(QString::fromUtf8(":/liqi/kinect.png")));
这是ui_mainwindow.h中显示的代码,当我使用Qtdesigner进行预览时,可以显示图像.但是当我使用代码块运行时,像按钮等一切都很好,但图像不会出现.我需要在下面的部分添加任何内容吗？
MainWindow::MainWindow(Tqt_interface* tqt, QWidget *parent ) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
}