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Why does modern Perl avoid UTF-8 by default?
...lts: you can have a working program for a long time, but when you start to repair it, it breaks. Don't worry; if you are adding encode/decode statements to your program and it breaks, it just means you have more work to do. Next time, when you design with Unicode in mind from the beginning, it will ...
MyISAM versus InnoDB [closed]
...d operations can cause the data to become corrupt. This would require full repair or rebuilds of the indexes and tables.
InnoDB, on the other hand, uses a transactional log, a double-write buffer and automatic checksumming and validation to prevent corruption. Before InnoDB makes any changes, it re...
How to use range-based for() loop with std::map?
...f you don't plan on modifying the values.
In C++11 and C++14, you can use enhanced for loops to extract out each pair on its own, then manually extract the keys and values:
for (const auto& kv : myMap) {
std::cout << kv.first << " has value " << kv.second << std::en...
File Hash 扩展：文件哈希计算和 Base64 编码文件，sha256、sha512 哈希 ·...
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File Hash 扩展
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基本文件哈希计算
同时计算 SHA256 和 SHA512
文件完...
Finding all cycles in a directed graph
...er the starting point of multiple practical algorithms which apply various enhancements in order to improve performance and avoid cycle duplication. I was surprised to find out some time ago that these algorithms are not readily available in textbooks and on the web. So I did some research and imple...
How to iterate over rows in a DataFrame in Pandas
...roduce you to Pandas and its library of vectorized*/cythonized functions.
Enhancing Performance - A primer from the documentation on enhancing standard Pandas operations
Are for-loops in pandas really bad? When should I care? - a detailed writeup by me on list comprehensions and their suitability ...
ImageView 扩展：图片查看器扩展，支持缩放、双击缩放和动画缩放 · App In...
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ImageView 扩展
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Multiple aggregations of the same column using pandas GroupBy.agg()
...ive syntax for specifying named aggregations. See the 0.25 docs section on Enhancements as well as relevant GitHub issues GH18366 and GH26512.
From the documentation,
To support column-specific aggregation with control over the output
column names, pandas accepts the special syntax in GroupB...
ruby on rails f.select options with custom attributes
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I ran into this issue as well and created the "enhanced_select" Ruby Gem to solve this problem. You can find it here:
https://github.com/bkuhlmann/enhanced_select
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开源跳板机(堡垒机)Jumpserver v2.0.0 使用说明 - 开源 & Github - 清泛网 ...
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二. 资产管理
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