我有两个VPC：
We have successfully setup a VPC peering connection, routes and security groups to allow appropriate communication.
In order to resolve the RDS instance AZ-appropriate local IP address from it's hostname, we need to follow these instructions and set --requester-peering-connection-options AllowDnsResolutionFromRemoteVpc=true.
If I do this manually through the AWS Console or the AWS CLI it all works fine, however I'm creating the cluster of EC2 instances through CloudFormation and the option is missing from the CloudFormation documentation …
在使用jTidy(在Android上)时,我遇到了一个非常烦人的问题.我发现jTidy适用于我测试过的每个HTML文档,除了以下内容:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<!-- Always force latest IE rendering engine & Chrome Frame
Remove this if you use the .htaccess -->
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" />
<title>templates</title>
<meta name="description" content="" />
<meta name="author" content="" />
<meta name="viewport" content="width=device-width; initial-scale=1.0" />
<!-- Replace favicon.ico & apple-touch-icon.png in the root of your domain and delete these references -->
<link rel="shortcut icon" href="/favicon.ico" />
<link rel="apple-touch-icon" href="/apple-touch-icon.png" />
</head>
<body>
<div>
<header>
<h1>Page Heading</h1>
</header>
<nav>
<p><a href="/">Home</a></p> …我不明白.在java中,我允许将接口声明为方法的返回类型,如:
public List<String> get(){
return new ArrayList<String>();
}
如果我现在有一个接口可以说I和C实现它的类,为什么我不允许这样定义:
public List<I> get(){
return new ArrayList<C>();
}
我知道创建ArrayList<I>并添加C它的解决方案,但我想知道为什么我不允许像上面那样声明它.我认为每一个C都是一个I虽然应该没问题.