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Python Sets vs Lists
In Python, which data structure is more efficient/speedy? Assuming that order is not important to me and I would be checking for duplicates anyway, is a Python set slower than a Python list?
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Why are elementwise additions much faster in separate loops than in a combined loop?
...auses false aliasing stalls in the processor load/store units.
However, in order for false aliasing to occur, there must be a large enough stride between the datasets. This is why you don't see this in region 3.
Region 5:
At this point, nothing fits in the cache. So you're bound by memory bandwidth....
What are the differences between B trees and B+ trees?
... fit on a page of memory. Therefore, it will require fewer cache misses in order to access data that is on a leaf node.
The leaf nodes of B+ trees are linked, so doing a full scan of all objects in a tree requires just one linear pass through all the leaf nodes. A B tree, on the other hand, would re...
What is the best collation to use for MySQL with PHP? [closed]
...ents and sorting as if it were ASCII
utf8_unicode_ci uses the Unicode sort order, so it sorts correctly in more languages
However, if you are only using this to store English text, these shouldn't differ.
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Can you provide some examples of why it is hard to parse XML and HTML with a regex? [closed]
...HTML and XML are recursive structures which require counting mechanisms in order to properly parse. A true regex is not capable of counting. You must have a context free grammar in order to count.
The previous paragraph comes with a slight caveat. Certain regex implementations now support the ide...
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
...完毕。
配置系统
配置 网卡 BOND
1、编辑 /etc/hosts 文件
节点1 节点 2 温备节点全部一样
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6...
Alternate FizzBuzz Questions [closed]
...andidates, just like FizzBuzz. Here are some of the problems I've seen, in order of increasing difficulty:
Reverse a string
Reverse a sentence ("bob likes dogs" -> "dogs likes bob")
Find the minimum value in a list
Find the maximum value in a list
Calculate a remainder (given a numerator and de...
How do I provide JVM arguments to VisualVM?
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Should be able to modify the memory settings in %JDK_HOME%\lib\visualvm\etc\visualvm.conf
Xms and Xmx are in the default_options line.
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List OrderBy Alphabetical Order
...(x.LastName, y.LastName));
If you mean a new list:
var newList = people.OrderBy(x=>x.LastName).ToList(); // ToList optional
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jumpserver-华为云免费堡垒机解决方案 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...-华为云免费堡垒机解决方案一、环境CentOS 6.x x86_64 minivi etc hostsvi etc sysconfig networkservice iptables stopchkconfig iptables off关闭SELinu...一、环境
CentOS 6.x x86_64 mini
vi /etc/hosts
vi /etc/sysconfig/network
service iptables stop
chkconfig iptab...