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分布式系统的事务处理 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...中的虚线，那些F,T是Failuer或Timeout，其中的：状态含义是 q – Query，a – Abort，w – Wait，p – PreCommit，c – Commit）
从上图的状态变化图我们可以从虚线（那些F,T是Failuer或Timeout）看到——如果结点处在P状态（PreC...
Does Python have “private” variables in classes?
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I wonder if PHP has something similar with its goofy private variables - since private variables don't really make sense in interpreted language - I mean what optimization can it do knowing x variable is private, if it is not compiled?
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What do people find difficult about C pointers? [closed]
...ted). Here are four ways to access elements of an array:
array notation (indexing) with the
array name
array notation (indexing) with the
pointer name
pointer notation (the *) with the
pointer name
pointer notation (the *) with the
array name
int vals[5] = {10, 20, 30, 40, 50};
int *ptr;
ptr...
How to check whether an object has certain method/property?
...much any modern dynamic scripting language (Python, Javascript, VB script, PHP, Lua... I could go on and on). It's not a bug, it's a feature.
– Tim Keating
Dec 3 '11 at 14:36
5
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Oracle 11.2.0.4 RAC FOR redhat 6.4 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
...024
oracle hard nofile 65536
/etc/pam.d/login添加：
session required pam_limits.so
创建磁盘组
GRID 安装完成 在GRID 用户下输入asmca
创建 Flash_Recovery 盘组
所有盘组都创建完成后退出
开始安装oracle software
使用ora...
What's the best manner of implementing a social activity stream? [closed]
...ok at getstream.io There are clients available for Node, Python, Rails and PHP.
In addition have a look at this high scalability post were we explain some of the design decisions involved:
http://highscalability.com/blog/2013/10/28/design-decisions-for-scaling-your-high-traffic-feeds.html
This tut...
Are braces necessary in one-line statements in JavaScript?
...e follows in all C syntax style languages with bracing. C, C++, Java, even PHP all support one line statement without braces. You have to realize that you are only saving two characters and with some people's bracing styles you aren't even saving a line. I prefer a full brace style (like follows) so...
What is the _snowman param in Ruby on Rails 3 forms for?
...characters). As a result, it's extremely common for Ruby applications (and PHP applications, etc. etc.) to exhibit this user-facing bug, and therefore extremely common for users to try to change the encoding as a palliative measure.
All that said, when I wrote this patch, I didn't realize that the ...
Having a private branch of a public repo on GitHub?
I have a public PHP project in a GitHub repo, which contains just one branch (master).
4 Answers
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Is there a software-engineering methodology for functional programming? [closed]
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@Thorsten the basic idea is set=table, map=index. The hard part is keeping indexes and tables synced but this problem can be solved with better set types. One simple set type I implemented is the keyed-set which is a set which uses a key function to test for unicity. ...