严格的说，简单工厂模式并不是23种常用的设计模式之一，它只算工厂模式的一个特殊实现。简单工厂模式在实际中的应用相对于其他2个工厂模式用的还是相对少得多，因为它只适应很多简单的情况。...

前几天一位朋友问我一个问题，光芯片版图里单根波导断开，形成两根波导。两根波导相隔了1纳米，会有什么影响？波导结构示意图如下，WG1与WG2之间相隔的距离为gap,...

由以上介绍大概了解，自旋锁就是内核为防止临界区被多个进程同时访问出错的一种机制。其作用是保证临界区在任一时刻有且仅有一个进程访问。

Given two integers dividend and divisor, divide two integers without using multiplication, division and mod operator.

1. 简介       Simpson’s Paradox refers to situations in which a trend or relationship that is observed within multiple groups reverses when the groups are combin...

不管是啥语言，程序都是按照语句的顺序一行一行执行的！虽然代码看起来和鬼画符差不多，但是这些鬼画符是按照先后次序一行一行执行的！不信你看下面的结果...

You are given three integers x,y and n. Your task is to find the maximum integer k such that 0≤k≤n that kmodx=y, where mod is modulo operation. Many programming...

The task is simple: given any positive integer N, you are supposed to count the total number of 1's in the decimal form of the integers from 1 to N. For example...

Being unique is so important to people on Mars that even their lottery is designed in a unique way. The rule of winning is simple: one bets on a number chosen f...

Eva is trying to make her own color stripe out of a given one. She would like to keep only her favorite colors in her favorite order by cutting off those unwant...