General Transaction Overview Why do you need transactions? What is Transaction? Characteristics of transactions Transaction Types Explicit Transaction and Implicit Transaction ...

Release Preparation Release Process Prepare signatures Prepare gpg key Installation and configuration of the signature software GnuPG GnuPG installation configuration Generate ...

Triaging Bugs Status flow Platform Version Can Reproduce Cannot Reproduce Importance Guidance for using Importance Asserts and Crashes Canned Answers and Recognizing Common...

Django at a glance Design your model Install it Enjoy the free API A dynamic admin interface: it’s not just scaffolding – it’s the whole house Design your URLs Write your view...

table 库 下标从 1 开始 table.getn 获取长度 table.concat (table [, sep [, i [, j ] ] ]) table.insert (table, [pos ,] value) table.maxn (table) table.remove (table [, pos]) table.sort (t...

General optimization tips Introduction Smoke and mirrors The nature of slowness Measuring performance Limitations Detective work Hypothesis testing Binary search Profilers ...

14.1. csv — CSV 文件读写 14.1.1. 模块内容 14.1.2. 变种与格式参数 14.1.3. Reader 对象 14.1.4. Writer 对象 14.1.5. 例子 14.1. csv — CSV 文件读写 源代码： Lib/csv.py CSV (Comma Separated Values) 格...

Plugging the Leaks（堵住漏洞） Plugging the Leaks（堵住漏洞） In his essay “The Law of Leaky Abstractions,” Joel Spolsky coined the term leaky abstraction to describe an abstraction that “...

csv —- CSV 文件读写 模块内容 变种与格式参数 Reader 对象 Writer 对象 示例 csv —- CSV 文件读写 源代码： Lib/csv.py CSV (Comma Separated Vaules) 格式是电子表格和数据库中最常见的输入、输出文件格式。在 RFC 4180 规范推出的很多年前，CSV 格式...

Performance Fast bytecode interpreter Optimizing compiler Epsilon-overhead debugger Inline caching for table and global access Importing global access chains Fast method calls...