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What are the most interesting equivalences arising from the Curry-Howard Isomorphism?
...ot reflected in expressions)
intersection types | implicit conjunction
union types | implicit disjunction
open code | temporal next
closed code | necessity
effects | possibility
reachable state | possible world
monadic metalanguage | lax...
Dropping Unique constraint from MySQL table
How can I drop the "Unique Key Constraint" on a column of a MySQL table using phpMyAdmin?
10 Answers
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Types in MySQL: BigInt(20) vs Int(20)
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See http://dev.mysql.com/doc/refman/8.0/en/numeric-types.html
INT is a four-byte signed integer.
BIGINT is an eight-byte signed integer.
They each accept no more and no fewer values than can be stored in their respective number of by...
BugTrap程序崩溃快照上传服务端开发配置 - C/C++ - 清泛网 - 专注C/C++及内核技术
...篇《BugTrap:程序崩溃快照、bug跟踪之利器》详细介绍了如何利用BugTrap监控程序崩溃,这里继续介绍如何将客户端的崩溃包上传至服务器端(当然前提是用户选择“发送报告”)。上一篇《BugTrap:程序崩溃快照、bug跟踪之利器》...
程序员找女朋友的技术攻略:实战篇 - 杂谈 - 清泛网 - 专注C/C++及内核技术
...确需求是很难达到预期效果的。这次,我们来谈谈程序员如何找女朋友,如何找到女朋友,这里有几点战略性的建议:
一、如何搭讪
• 不要害羞
有一部分程序员“天生不够淫荡”,看到女生就会脸红,尤其是自己喜欢的...
一张图告诉你是需要 SQL 还是 Hadoop - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...己的项目,什么时候用 SQL,什么时候用 Hadoop,它们之间如何取舍?Aaron Cordova 用一张图来回答你这个问题,对于不同的数据场景,如何选取正确的数据存储处理工具进行了详细描述。Aaron Cordova 是美国大数据分析及架构专家,Kov...
App Inventor 2在不同的屏幕之间传递变量 - App Inventor 2 中文网 - 清泛I...
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屏幕2的代码如下:
如果有两个变量,该如何操作?6921孙 发表于 2023-01-28 20:23
如果有两个变量,该如何操作?
两种思路:
1、多个变量可以用逗号拼在一起当成一个文本传递过去后,然后使用文本里的函数分...
jemalloc 接入方法:提高内存使用效率解决内存泄漏 - C/C++ - 清泛网 - 专...
...jemalloc 介绍及编译步骤本文直接略过,仅记录一下C++程序如何接入jemalloc,以及如何确认jemalloc已载入。注:jemalloc是非侵入式的,目标程序无需依赖jemalloc库,只需要在目标 jemalloc 介绍及编译步骤本文直接略过,仅记录一下C++...
How should one use std::optional?
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@Rapptz Line 256: union storage_t { unsigned char dummy_; T value_; ... } Line 289: struct optional_base { bool init_; storage_t<T> storage_; ... } How is that not "a T and a bool"? I completely agree the implementation is very tricky an...
What does `unsigned` in MySQL mean and when to use it?
What does "unsigned" mean in MySQL and when should I use it?
1 Answer
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