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一致性hash和solr千万级数据分布式搜索引擎中的应用 - 大数据 & AI - 清泛...
...ched。下面简单介绍下一致性hash的基本原理。最早的版本 http://dl.acm.org/citation.cfm?id=258660。国内网上有很多文章都写的比较好。如： http://blog.csdn.net/x15594/article/details/6270242
准备：1、2、3 三台机器
还有待分配的9个数 1、2、3、4...
使用 JSON 和 Web API · App Inventor 2 中文网
...，该事件有两个重要参数：
响应代码: 服务器提供的HTTP状态码，常见的有 200（OK）或 201（已创建），也可能是 400 之类的值 （错误请求）、403（禁止访问）和 404（未找到）。根据你在应用程序中使用的 API，你应该检查状态...
Why use AJAX when WebSockets is available?
...cation domains to browser applications that were not really possible using HTTP and AJAX (interactive games, dynamic media streams, bridging to existing network protocols, etc).
However, there is certainly an overlap in purpose between WebSockets and AJAX/Comet. For example, when the browser wants ...
How do I view / replay a chrome network debugger har file saved with content?
...d by Jan Odvarko that you can use. You either use the online version at
http://www.softwareishard.com/har/viewer/ (older version)
http://gitgrimbo.github.io/harviewer/master/ (up-to-date master branch)
Or download the source-code at https://github.com/janodvarko/harviewer.
EDIT: Chrome 62 DevT...
Rails update_attributes without save?
...gn_attributes
update_attributes = deprecated, alias of update
Source:
https://github.com/rails/rails/blob/master/activerecord/lib/active_record/persistence.rb
https://github.com/rails/rails/blob/master/activerecord/lib/active_record/attribute_assignment.rb
Another cheat sheet:
http://www.david...
How to simulate target=“_blank” in JavaScript
...
<script>
window.open('http://www.example.com?ReportID=1', '_blank');
</script>
The second parameter is optional and is the name of the target window.
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How to randomly sort (scramble) an array in Ruby?
...t in.
class Array
# Standard in Ruby 1.8.7+. See official documentation[http://ruby-doc.org/core-1.9/classes/Array.html]
def shuffle
dup.shuffle!
end unless method_defined? :shuffle
# Standard in Ruby 1.8.7+. See official documentation[http://ruby-doc.org/core-1.9/classes/Array.html]
...
How can a web application send push notifications to iOS devices? [closed]
...aging functions on the iPhone.
See these links provided by Peter Hosey:
https://support.apple.com/kb/HT201925
https://developer.apple.com/library/content/documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/APNSOverview.html
...
How to delete or add column in SQLITE?
... actually wrote about it on my blog, you can see more explanations there:
http://udinic.wordpress.com/2012/05/09/sqlite-drop-column-support/
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fo...
Register Application class in Manifest?
...n the manifest tag, then just start with a .:
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.you.yourapp">
<application
android:name=".ApplicationEx"
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