我正在尝试安装 redmine-2.4.1,但我收到类 SyntaxError 的超类不匹配。这里可能有什么问题?
ruby -v
ruby 2.0.0p353 (2013-11-22 revision 43784) [x86_64-linux]
rails -v
Rails 3.2.15
lsb_release -a
LSB Version: :core-3.1-amd64:core-3.1-ia32:core-3.1-noarch:graphics-3.1-amd64:graphics-3.1-ia32:graphics-3.1-noarch
Distributor ID: CentOS
Description: CentOS release 5.4 (Final)
Release: 5.4
Codename: Final
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$ rake generate_secret_token --trace
/usr/local/lib/ruby/2.0.0/x86_64-linux/psych.so:警告:已初始化常量 Psych::Parser::ANY
/usr/local/lib/ruby/2.0.0/x86_64-linux/psych.so:警告:已初始化常量 Psych::Parser::UTF8
/usr/local/lib/ruby/2.0.0/x86_64-linux/psych.so:警告:已初始化常量 Psych::Parser::UTF16LE
/usr/local/lib/ruby/2.0.0/x86_64-linux/psych.so:警告:已初始化常量 Psych::Parser::UTF16BE
耙子中止!
类 SyntaxError 的超类不匹配
/usr/local/lib/ruby/2.0.0/psych/syntax_error.rb:5:in `'
/usr/local/lib/ruby/2.0.0/psych/syntax_error.rb:1:in `'
/usr/local/lib/ruby/2.0.0/psych.rb:1:in `require'
/usr/local/lib/ruby/2.0.0/psych.rb:1:in `'
/usr/local/lib/ruby/gems/2.0.0/gems/activesupport-3.2.15/lib/active_support/ordered_hash.rb:2:in `require'
/usr/local/lib/ruby/gems/2.0.0/gems/activesupport-3.2.15/lib/active_support/ordered_hash.rb:2:in `'
/usr/local/lib/ruby/gems/2.0.0/gems/activesupport-3.2.15/lib/active_support/ordered_options.rb:1:in `require'
/usr/local/lib/ruby/gems/2.0.0/gems/activesupport-3.2.15/lib/active_support/ordered_options.rb:1:in `'
/usr/local/lib/ruby/gems/2.0.0/gems/railties-3.2.15/lib/rails/configuration.rb:2:in `require'
/usr/local/lib/ruby/gems/2.0.0/gems/railties-3.2.15/lib/rails/configuration.rb:2:in `'
/usr/local/lib/ruby/gems/2.0.0/gems/railties-3.2.15/lib/rails/railtie.rb:2:in `require'
/usr/local/lib/ruby/gems/2.0.0/gems/railties-3.2.15/lib/rails/railtie.rb:2:in `'
/usr/local/lib/ruby/gems/2.0.0/gems/railties-3.2.15/lib/rails/engine.rb:1:in `require'
/usr/local/lib/ruby/gems/2.0.0/gems/railties-3.2.15/lib/rails/engine.rb:1:in `'
/usr/local/lib/ruby/gems/2.0.0/gems/railties-3.2.15/lib/rails/plugin.rb:1:in `require'
/usr/local/lib/ruby/gems/2.0.0/gems/railties-3.2.15/lib/rails/plugin.rb:1:in … 我有以下XSL转换:
<xsl:for-each select="refsect1[@id = 'seealso']/para/citerefentry">
/// <seealso cref=""/>
<xsl:value-of select="refentrytitle" />
</xsl:for-each>
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我怎样才能把价值refentrytitle中的CREF属性seealso模板标签?
我$.each用来创建每个数组对象的按钮.我还尝试给每个按钮一个特定的id,所以我可以点击事件进行进一步编码,但现在我不知道为什么所有按钮都不起作用.我错过了一些代码吗?
var questlist = [{
"startdate": "2015-01-08",
"questitem": [
{
"questid": "1",
"gifttype": "stars",
"quantity": 10,
"questname": "One",
"queststatus": "done"
}, {
"questid": "2",
"gifttype": "stars",
"quantity": 50,
"questname": "Two",
"queststatus": "ready"
}, {
"questid": "3",
"gifttype": "stars",
"quantity": 100,
"questname": "Three",
"queststatus": "complete"
}, {
"questid": "4",
"gifttype": "stars",
"quantity": 120,
"questname": "Four",
"queststatus": "done"
}, {
"questid": "5",
"gifttype": "stars",
"quantity": 220,
"questname": "Five",
"queststatus": "ready"
},
]
}];
questitemlist(questlist);
function questitemlist() {
var callquest = …Run Code Online (Sandbox Code Playgroud)我正在Scala中编写一个数据挖掘算法,我想为给定的测试和几个列车实例编写欧几里德距离函数.我有一个Array[Array[Double]]测试和训练实例.我有一个方法,它针对所有训练实例循环遍历每个测试实例,并计算两者之间的距离(每次迭代选择一个测试和训练实例)并返回a Double.
比方说,我有以下数据点:
testInstance = Array(Array(3.2, 2.1, 4.3, 2.8))
trainPoints = Array(Array(3.9, 4.1, 6.2, 7.3), Array(4.5, 6.1, 8.3, 3.8), Array(5.2, 4.6, 7.4, 9.8), Array(5.1, 7.1, 4.4, 6.9))
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我有一个方法存根(突出显示距离函数),它返回给定测试实例周围的邻居:
def predictClass(testPoints: Array[Array[Double]], trainPoints: Array[Array[Double]], k: Int): Array[Double] = {
for(testInstance <- testPoints)
{
for(trainInstance <- trainPoints)
{
for(i <- 0 to k)
{
distance = euclideanDistanceBetween(testInstance, trainInstance) //need help in defining this function
}
}
}
return distance
}
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我知道如何写一个通用的欧几里德距离公式:
math.sqrt(math.pow((x1 - y1), 2) + math.pow((x2 - y2), …Run Code Online (Sandbox Code Playgroud) 我试图使用JavaScript将ArrayBuffer转换为int.我的应用程序使用WebSocket,在Sender端我有一个0到4之间的整数.我在C#中转换这个ArraySegment.我通过Web套接字将其发送到我的JavaScript客户端,该客户端将其作为ArrayBuffer接收.
ArrayBuffer现在保持0或1或2或3的值.如何"读取"该值?
I am trying to rewrite an official Scrapy tutorial (http://doc.scrapy.org/en/latest/intro/tutorial.html) code with russian site habrahabr.ru.
Here is my code:
import scrapy
class DmozSpider(scrapy.Spider):
name = 'habr'
allowed_domains = ['habrahabr.ru']
start_urls = [
'http://habrahabr.ru/interesting/'
]
def parse(self, response):
yield {'title': response.xpath('//title/text()').extract()[0]}
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it returns: {'title': u'\u0418\u043d\u0442\u0435\u0440\u0435\u0441\u043d\u044b\u0435 \u043f\u0443\u0431\u043b\u0438\u043a\u0430\u0446\u0438\u0438 / \u0425\u0430\u0431\u0440\u0430\u0445\u0430\u0431\u0440'}
when I try:
yield {'title': response.xpath('//title/text()').extract()[0].encode('utf-8')}
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returns:
{'title': '\xd0\x98\xd0\xbd\xd1\x82\xd0\xb5\xd1\x80\xd0\xb5\xd1\x81\xd0\xbd\xd1\x8b\xd0\xb5 \xd0\xbf\xd1\x83\xd0\xb1\xd0\xbb\xd0\xb8\xd0\xba\xd0\xb0\xd1\x86\xd0\xb8\xd0\xb8 / \xd0\xa5\xd0\xb0\xd0\xb1\xd1\x80\xd0\xb0\xd1\x85\xd0\xb0\xd0\xb1\xd1\x80'}
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How can I change this behavior?
我有一个带有几个响应模型的ASP.NET Web Api 2项目.在尝试创建较小的有效负载时,我向用户提供了将实体折叠为id和href链接的选项,我想自动生成.我希望我的所有主要资源响应模型都继承自只有href和的基本响应模型id.如果我有资源Foo,这看起来像这样:
public class ResourceResponseModel
{
public string Href { get; private set; }
public string Id { get; private set; }
protected ResourceResponseModel(string id)
{
Id = id;
}
}
public class FooModel : ResourceResponseModel
{
public string Name { get; private set; }
private ExampleModel (string id, string name)
: base(id)
{
Name = name;
}
internal static FooModel From(Foo foo)
{
return new FooModel(
foo.Id,
foo.Name
);
}
} …Run Code Online (Sandbox Code Playgroud) 我想在我自己的服务器上托管我的扩展。我找到了这个页面:https : //developer.chrome.com/extensions/hosting
开头说:
警告:从 Chrome 33 开始,Windows 用户只能下载 Chrome 网上应用店中托管的扩展程序,但通过企业策略或开发人员模式安装的扩展程序除外(请参阅保护 Windows 用户免受恶意扩展程序的侵害)。从 Chrome 44 开始,不允许从 Mac 上本地 .crx 的路径进行外部安装(请参阅继续保护 Chrome 用户免受恶意扩展程序的侵害)。
这似乎表明您不能再自己托管扩展程序,只能通过 Chrome 商店。这是正确的还是有办法托管您自己的 Chrome 扩展程序?
我正在从视频数据中进行一些运动跟踪。使用一些视频处理(即转换为自上而下的视图)我已经获得了一个运动路径。我现在需要将路径 (x,y) 的像素坐标转换为世界坐标 (lat, long)。
我在图像中有四个参考点及其相关的纬度和经度点。(纬度/经度 -> 像素坐标):
(51.606733, -3.986813) -> (246, 399)
(51.607357, -3.987126) -> (407, 781)
(51.607337, -3.987266) -> (838, 781)
(51.606671, -3.987175) -> (1247, 402)
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如何使用这些参考点将像素坐标转换为世界坐标?
我收到以下错误消息:
无法下载和安装iOS 7.1模拟器.安装软件包需要授权.
问题也出在XCode 7 beta版本上.我已经尝试了今天在developer.apple.com上提供的最新版本
我认为它与操作系统升级到El-Capitan有关,因为对于XCode 6.4和XCode 7 beta版本,模拟器下载对我在Yosemite工作的其他同事来说仍然很好.可能导致此错误的原因是什么?如何解决?
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