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摘要： 1. The basic structure select from where order by 2. Key:word: distinct 3. Functions: count( columName) count(DISTINCT columeName) min() max() char_le 阅读全文

摘要： 1. SQLite SQLite is a C-language library that implements a small, fast, self-contained, high-reliability, full-featured, SQL database engine. "SQLite 阅读全文

摘要： 1. Materials dried dates(without shell) x 100g; milk x 200ml; brown sugar x 100g; cake flour x 180g; eggs x 4or5; baking powder x 7g; baking soda x 4g 阅读全文

摘要： 1. Several terminologies: Address: Subnet: Subnet mask: A 32-bit combination used to describe which portion of an adress refers to the subnet and whic 阅读全文

摘要： 0. lambda emerged since c++11, lambda expression/function is an unnamed function object capable of capturing variables in scope. A lambda function is 阅读全文

摘要： When the interpreter reads a python script file, it does two things: (1) set some special variable. (2) it executes all the code from 1st line of that 阅读全文

摘要： The following links are from internet 1. open source protocol: https://www.jianshu.com/p/cceeafb019ed 阅读全文

摘要： 1. Qt history: Qt was initially developed by two persons, Haavard Nord(CEO), and Eirik Chambere(President) in early 90. Qt4 was published in Summer 20 阅读全文

摘要： C programming language was developed in 1972 by Dennis Ritchie at bell laboratories of AT&T (American Telephone & Telegraph) in the U.S.A. ANSI C or C 阅读全文

摘要： 非原创，转载自stackoverflow 确切的说override并非一个keyword The override keyword serves two purposes: To explain the latter: In derived2 the compiler will issue an e 阅读全文