#include "pch.h" #include <iostream> #include <deque> #include <string> #include <list> #include <algorithm> #include <vector> #include <functional> using namespace std; template<typename InputIterato…

思想 django为使用一种新的方式,即:关系对象映射(Object Relational Mapping,简称ORM). PHP:activerecord Java:Hibernate C#:Entity Framework django中遵循 Code Frist 的原则,即:根据代码中定义的类来自动生成数据库表. 创建数据库,设计表结构和字段 使用 MySQLdb 来连接数据库,并编写数据访问层代码 业务逻辑层去调用数据访问层执行数据库操作 三层架构…

Functions in Java Prior to the introduction of Lambda Expressions feature in version 8, Java had long been known as a purely object-oriented programming language. "Everything is an Object" is the philosophy deep in the language design. Objects a…

1: 总体结构 LAV Filter 是一款视频分离和解码软件,他的分离器封装了FFMPEG中的libavformat,解码器则封装了FFMPEG中的libavcodec.它支持十分广泛的视音频格式. 源代码位于GitHub或Google Code: https://github.com/Nevcairiel/LAVFilters http://code.google.com/p/lavfilters/ 本文分析了LAV Filter源代码的总体架构. 使用git获取LAV filter源代码之…

转自 http://blog.leezhong.com/ios/2013/06/19/frp-reactivecocoa.html Functional Reactive Programming(以下简称FRP)是一种响应变化的编程范式.先来看一小段代码 a = 2 b = 2 c = a + b // c is 4 b = 3 // now what is the value of c? 如果使用FRP,c的值将会随着b的值改变而改变,所以叫做「响应式编程」.比较直观的例子就是Excel,当改…

Defining a Functional Interface @FunctionalInterface public interface TailCall<T> { TailCall<T> apply(); default boolean isComplete() { return false; } //... } A functional interface must have one abstract-unimplemented-method. It may have zer…

Java Development Kit 8 has a number of functional interfaces. Here we review the starter set-the interfaces we frequently encounter and need to first get familiar with. All the interfaces we see here are part of the java.util.function package. Consum…

Here I share with you a demo for python map, reduce and filter functional programming thatowned by me(Xiaoqiang). I assume there are two DB tables, that `file_logs` and `expanded_attrs` which records more columns to expand table `file_logs`. For demo…

上一篇文章分析了LAV Filter 中的LAV Video的两个主要的类:CLAVVideo和CDecodeThread.文章:LAV Filter 源代码分析 3: LAV Video (1) 在这里继续上篇文章的内容.文章中提到LAVVideo主要通过CDecodeThread这个类进行解码线程的管理,其中有一个关键的管理函数:ThreadProc(),包含了对解码线程的各种操作.函数如下所示: //包含了对进程的各种操作 DWORD CDecodeThread::ThreadProc()…

英文原始出处: Bloom filter for Scala, the fastest for JVM 本文介绍的是用Scala实现的Bloom filter. 源代码在github上.依照性能测试结果,它是JVM上的最快的Bloom filter实现.零分配(Zero-allocation)和高度优化的代码. 无内存限制,所以没有包含元素的数量限制和可控的误报率(false positive rate).扩展:可插拔的Hash算法,任意的元素类型.没错,它使用sun.misc.unsafe.…