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RSS订阅原创 Computer network
Computer network Difference between Wi-Fi and WLAN Is WLAN and WiFi the same thing? Technically, WLAN means any wireless local area network no matter what technology is used and Wi-Fi is a type of WLAN that follows the IEEE 802.11 standards which most WLAN
2021-05-31 23:33:19
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原创 hosts 文件的作用
hosts file hosts 文件是历史遗留问题。早年间在ARPANET 时期，是没有DNS的，整个互联网上只有数百台主机，那时就是通过hosts 文件来解析域名的。后来Internet 爆发增长，已经不可能再将所有的主机名与ip的对应关系写进hosts 文件里面了，那样速度太难。后来就出现了DNS。DNS是一个分布式的数据库。同时原来的hosts 文件也保留了下来 。当主机进行dns查询的时候，是先查找hosts文件，如果在hosts文件中找不到对应关系，再询问dns服务器。 The hosts fi
2021-05-30 01:01:08
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原创 Parse JSON in C++
We will discuss JSON data, Object, Array, JSON syntax, and then go through several working examples to understand the parsing mechanism of JSON data in C++. What is JSON? JSON stands for JavaScript Object Notation. As the full name indicates, it is derived
2021-05-16 23:41:38
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原创 排序算法分析总结
Analysis of different sorting techniques Bubble Sort 冒泡排序的算法时间复杂度是 n^2 Implementation: // cpp void bubble_sort(std::vector<int>& array) { int size = array.size(); for (int i = size - 1; i > 0; --i) { for (int j = 0; j < i; +
2021-05-16 01:41:23
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原创 numpy
概述 数据分析绝对绕不过的三个包是numpy、scipy和pandas。 numpy是Python的数值计算扩展，专门用来处理矩阵，它的运算效率比列表更高效。 scipy是基于numpy的科学计算包，包括统计、线性代数等工具。 pandas是基于numpy的数据分析工具，能更方便的操作大型数据集。 —2017-06-29 基础知识： List List is a non-homogeneous data structure which stores the elements in singl
2021-05-15 00:09:23
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转载 Why Python is Slow: Looking Under the Hood
Why Python is Slow: Looking Under the Hood We’ve all heard it before: Python is slow. When I teach courses on Python for scientific computing, I make this point very early in the course, and tell the students why: it boils down to Python being a dynamicall
2021-05-14 23:59:15
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