我正在使用Line类在WPF中的画布上绘制,即使我设置StrokeThickness = 1,该行显示2像素宽 - 这几乎就像最小厚度是2.如何绘制真正1像素厚的线？
Line myLine = new Line();
myLine.Stroke = System.Windows.Media.Brushes.Black;
myLine.X1 = 100;
myLine.X2 = 140; // 150 too far
myLine.Y1 = 200;
myLine.Y2 = 200;
myLine.StrokeThickness = 1;
graphSurface.Children.Add(myLine);
我在localhost上使用多播UDP来实现在一台机器上运行的松散的协作程序集合.以下代码适用于Mac OSX,Windows和Linux.缺点是代码也会在localhost网络之外接收UDP数据包.例如,sendSock.sendto(pkt, ('192.168.0.25', 1600))当我从我网络上的另一个盒子发送时,我的测试机器会收到它.
import platform, time, socket, select
addr = ("239.255.2.9", 1600)
sendSock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP)
sendSock.setsockopt(socket.IPPROTO_IP, socket.IP_MULTICAST_TTL, 24)
sendSock.setsockopt(socket.IPPROTO_IP, socket.IP_MULTICAST_IF,
socket.inet_aton("127.0.0.1"))
recvSock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP)
recvSock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, True)
if hasattr(socket, 'SO_REUSEPORT'):
recvSock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEPORT, True)
recvSock.bind(("0.0.0.0", addr[1]))
status = recvSock.setsockopt(socket.IPPROTO_IP, socket.IP_ADD_MEMBERSHIP,
socket.inet_aton(addr[0]) + socket.inet_aton("127.0.0.1"));
while 1:
pkt = "Hello host: {1} time: {0}".format(time.ctime(), platform.node())
print "SEND to: {0} data: {1}".format(addr, pkt)
r = sendSock.sendto(pkt, addr)
while select.select([recvSock], [], [], 0)[0]:
data, fromAddr = recvSock.recvfrom(1024)
print …我是Python的新手,并试图通过将以下C++函数复制到python中来学习它
// determines which words in a vector consist of the same letters
// outputs the words with the same letters on the same line
void equivalentWords(vector <string> words, ofstream & outFile) {
outFile << "Equivalent words\n";
// checkedWord is parallel to the words vector. It is
// used to make sure each word is only displayed once.
vector <bool> checkedWord (words.size(), false);
for(int i = 0; i < words.size(); i++) {
if (!checkedWord[i]){
outFile << " ";
for(int j …是否可能或合理地将位图数据编码为JSON以在Web服务中返回？
更新:是的,这比我想象的要好.我为一组图像和图像数据组合创建了一个.NET复合对象
Public Class AllThumbnails Public imgAllThumbs As String Public positions()As Drawing.Rectangle End Class
并通过jQuery AJAX访问它:
$.ajax({
type: "POST",
url: "WebService.asmx/makeAllThumbnailsImage",
data: "{DocumentNumber : \"" + DocumentNumber + "\"} ",
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function (response) {
var adl = (typeof response.d) == 'string' ? eval('(' + response.d + ')') : response.d;
var data = Base64.decode(adl.imgAllThumbs);
$('#output').append("<p><strong>" + data.length + "</strong></p>");
$('#output').append("<p><strong><i>" + adl.positions.length + "<i></strong></p>");
},
failure: function (msg) {
$('#output').text(msg);
}
});
因为我的图像数据超出了标准的jsonSerialization缓冲区,所以我必须在web.config中增加一个值:
<system.web.extensions>
<scripting>
<webServices> … 在web2py视图中,如何注释掉服务器端代码？在ASP.NET中,我可以用<% - 和 - %>包围任何HTML或代码标记,并且该块不会被编译或发送到客户端.Velocity与#*和*#做同样的事情.web2py中是否有等价物？
ASP.NET
<div>
<p><%=foo.bar%></p>
<%-- don't print twice! <p><%=foo.bar%></p> --%>
</div>
的web2py
<div>
<p>{{=foo.bar}}</p>
??? don't print twice! <p>{{=foo.bar}}</p> ???
</div>
编辑:修复了web2py代码标签.
如果{{'''''''}}和{{"""..."""}}与内部代码块一起使用,则会引发异常.使代码大部分保持不变的非理想解决方法是从注释掉的代码块中删除双括号.
HTML
{{'''{{somefunction(42)}}'''}}
错误
Traceback (most recent call last):
File "gluon/restricted.py", line 176, in restricted
File "gluon/restricted.py", line 163, in compile2
File "C:\development\web2py\applications\SpaceCorps/views\default/index.html", line 74
'''{{somefunction(42)\nresponse.write("'''}}\r\n\t\t\r\n\t</div>\r\n</div>\n\t</body>\n</html>\n",escape=False)
^
SyntaxError: invalid syntax
生成的视图代码
'''{{somefunction(42)\nresponse.write("'''}}\r\n\t\t\r\n\t</div>\r\n</div>\n\t</body>\n</html>\n",escape=False)
{{#}}成功发表评论,但也没有按预期完成工作.然而,这可能更难以修复,并且应该易于解决.以下HTML将为最终HTML呈现两个结束括号,而我认为它不会呈现任何内容.
HTML
{{#{{somefunction(42)}}}}
我使用以下命令来grep子目录中的东西
find . | xargs grep -s 's:text'
但是,这也找到了类似的东西 <s:textfield name="sdfsf"...../>
我该怎么做才能避免这种情况,所以它只能找到类似的东西 <s:text name="sdfsdf"/>
或者那个问题......也发现了 <s:text somethingElse="lkjkj" name="lkkj"
基本上s:text,并name应在同一行....
我正在尝试使用Racket(以前的PLT Scheme)连接URL调度.我看了一下教程和服务器文档.我无法弄清楚如何将请求路由到相同的servlet.
具体例子:
#lang scheme
(require web-server/servlet)
(require web-server/dispatch)
(provide/contract (start (request? . -> . response/c)))
(define (start request)
(blog-dispatch request))
(define-values (blog-dispatch blog-url)
(dispatch-rules
(("") list-posts)
(("posts" (string-arg)) review-post)
(("archive" (integer-arg) (integer-arg)) review-archive)
(else list-posts)))
(define (list-posts req) `(list-posts))
(define (review-post req p) `(review-post ,p))
(define (review-archive req y m) `(review-archive ,y ,m))
(require web-server/servlet-env)
(serve/servlet start
#:launch-browser? #t
#:quit? #f
#:listen-ip #f
#:port 8080
#:extra-files-paths (list (build-path "js")
(build-path "css"))
#:servlet-path "")
假设上面的代码,localhost:8080/转到一个写"list-posts"的页面.打算localhost:8080/posts/test去球拍"未找到文件"页面(我希望它去一个页面,上面写着"审查,测试后").
感觉我错过了一些小而明显的东西.任何人都可以给我一个提示吗？
给定布局视图,如何从视图文件中将静态文件(基本上是CSS和JS)加载到<head>中？
的layout.html
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="{{=T.accepted_language or 'en'}}">
<head>
<title>{{=response.title or request.application}}</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<!-- include requires CSS files
{{response.files.append(URL(request.application,'static','base.css'))}}
{{response.files.append(URL(request.application,'static','ez-plug-min.css'))}}
-->
{{include 'web2py_ajax.html'}}
</head>
<body>
{{include}}
</body>
</html>
myview.html
{{extend 'layout.html'}}
{{response.files.append(URL(r=request,c='static',f='myview.css'))}}
<h1>Some header</h1>
<div>
some content
</div>
在上面的示例中,"myview.css"文件被web2py忽略或被浏览器剥离.
那么加载像这个CSS文件这样的页面特定文件的最佳方法是什么？我宁愿不把所有静态文件都填充到我的布局中.
我有一个非常简单的问题:如何使用代码在matlab中终止正在运行的脚本,类似于使用CTRL + C？
如果用户输入错误的数字,我希望程序停止运行.