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构建高并发高可用的电商平台架构实践 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...表为例；
对于访问数据库客户端来讲，需要根据用户的ID，定位到需要访问的数据；
数据切分算法，
根据用户的ID做hash操作，一致性Hash，这种方式存在失效数据的迁移问题，迁移时间内服务不可用
维护路由表，路由表中存...
Android: Expand/collapse animation
... adapts height if content changes. It works great for me.
public static void expand(final View v) {
int matchParentMeasureSpec = View.MeasureSpec.makeMeasureSpec(((View) v.getParent()).getWidth(), View.MeasureSpec.EXACTLY);
int wrapContentMeasureSpec = View.MeasureSpec.makeMeasureSpec(0, Vi...
Automatic HTTPS connection/redirect with node.js/express
...s, is it possible for an attacker to sniff out and steal a cookie (session ID)?
– Costa
Jun 23 '12 at 16:56
5
...
Automatically update version number
...uary 1st, 2000, and sets the revision part to the number of seconds since midnight, local time, divided by two. See this MSDN article.
Assembly version is located in an assemblyinfo.vb or assemblyinfo.cs file. From the file:
' Version information for an assembly consists of the following four val...
Difference between style = “position:absolute” and style = “position:relative”
...the browser viewport, and 20px from the left edge of same.
However, if I did something like this:
<div id="outer" style="position:relative">
<div id="inner" style="position:absolute; left: 20px; top: 20px;"></div>
</div>
...then the inner div would be positioned 20px...
How do I declare and assign a variable on a single line in SQL
... You can also initialize from a select statement, eg: declare @eid uniqueidentifier = (select top 1 id from t_Event)
– Damien Sawyer
Sep 8 '16 at 20:32
add a commen...
How can I lookup a Java enum from its String value?
...
Also, for arbitrary values (the second case) consider throwing an IllegalArgumentException instead of returning null (i.e. when no match is found) - this is how the JDK Enum.valueOf(..) does it, anyway.
– Priidu Neemre
May 21 '15 at 17...
How can I rethrow an exception in Javascript, but preserve the stack?
... preserve the call trace.
http://code.google.com/p/chromium/issues/detail?id=60240
I don't know of any workaround.
I don't see the problem with finally. I do see exceptions silently not showing up on the error console in some cases after a finally, but that one seems to be fixed in development b...
SQL Server: Maximum character length of object names
...
EXEC sp_server_info
The result will be something like that:
attribute_id | attribute_name | attribute_value
-------------|-----------------------|-----------------------------------
1 | DBMS_NAME | Microsoft SQL Server
2 | DBMS_VER | Microso...
Unable to understand useCapture parameter in addEventListener
..., DOM3 events: "the implementation must determine the current target's candidate event listeners. This must be the list of all event listeners that have been registered on the current target in their order of registration."
– Rob W
Sep 12 '14 at 20:47
...