taro best practice 最佳实践 https://taro-docs.jd.com/taro/docs/best-practice.html#关于-jsx-支持程度补充说明 https://github.com/js-newbee/taro-best-practices css flex PX js async callback…

March 16, 2016 Problem statement:Given a 2D array (matrix) named M, print all items of M in a spiral order, clockwise.For example: M  =  1   2   3   4   5       6   7   8   9  10      11  12  13  14  15      16  17  18  19  20 The clockwise spiral pr…

Atitit 数据存储视图的最佳实际best practice attilax总结 1.1. 视图优点:可读性的提升1 1.2. 结论  本着可读性优先于性能的原则,面向人类编程优先于面向机器编程,应该优先使用视图2 1.3. 视图的缺点:复杂视图有时可能带来性能下降3 1.1. 视图优点:可读性的提升 视图的主要作用有以下几点:视点集中:使用户只关心它感兴趣的某些特定数据和他们所负责的特定任务简化操作:,若视图本身就是一个复杂查询的结果集,这样在每一次执行相同的查询时,不必重新写这些复杂的查询…

0x01 Preface This post is mainly to share the technologies on my practice about the .NET Cross-Platforms. If you had watched my first top post,you will know most of technologies uesd in my practice.Now, I will Introduce the detials about this. Ready…

puts "Let's practice everything." puts 'You\'d need to know \'bout escapes with \\ that do \n newlines and \t tabs.' # the <<END is a "heredoc". See the Student Questions. poem = <<END \tThe lovely world with logic so firml…

ConCurrent in Practice小记 (3) 高级同步技巧 Semaphore Semaphore信号量,据说是Dijkstra大神发明的.内部维护一个许可集(Permits Set),用于发放许可和回收许可,存在内部计数器,主要用来计数能否得到资源(一般用来限制同时访问资源数).当一个线程拿到许可,计数器减一:当线程释放资源则计数器加一:当计数器为0则阻塞线程. 特别地: Semaphore的同步锁机制仅仅用于对访问许可的同步,对于需要访问对象的池等的同步锁并不保证.如一个线程池需…

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ConCurrent in Practice小记 (1) 杂记,随书自己写的笔记: 综述问题 1.线程允许在同一个进程中的资源,包括共享内存,内存句柄,文件句柄.但是每个进程有自己的程序计数器,栈和局部变量. 2.安全问题:线程不安全本质上是由于单线程在在从共享内存或者文件中取得自己的资源后,在寄存器处理器缓存等地方对于线程外部是不可见的;因此当变量再次读取或写入到内存或者是文件中后就会产生冲突. 3.活跃性问题:即因为资源占用错误而是的程序无法得到正确的结果,典型如死锁.饥饿.活锁. 4.性能…

摘要: 这是<CMMI快乐之旅>系列文章之一.说起猪皮(GP,Generic Practice),真的让人又爱又恨,中文翻译叫通用实践.CMMI标准中每个级别包含几个PA,每个PA又包含几个Goal,而每个Goal又包含几个Practice.实际上Goal分为两类,一类是Specific Goal(特定目标,简称SG),一类是Geniric Goal(通用目标,简称GG).SG包含的Practic叫做Specific Practic(特定实践,简称SP),GG包含的Practic叫做Genir…

2015年计划透析10本英文原著,最开始选定的第一本英文书是<Who Moved my Cheese>,可是这本书实在是太短.太简单了,总体的意思就是要顺应变化,要跳出自己的舒适区,全文不认识的单词也不多,所以很快读完后就开始找第其它的适合我的英文书. 根据<把你的英语用起来>作者的推荐,从zyea要到了<Daughter of Deceit>的文本,发送到Kindle上阅读试试.这书对于我来说果然还是有难度的,前面一堆人物的出场,让我实在搞不清楚他们之间的关系.看了不…

Writing thread-safe code is managing access to state and in particular to shared, mutable state. Object's state is its data, stored in state variables such as instance or static fields. Whether an object needs to be thread-safe depends on whether it…

shell practice 1 1.require A B C D 1 2 3 4 5 6 7 8 3 5 8 0 1 2 4 3 after handling: T A B C D A 1 2 3 4 B 5 6 7 8 C 3 5 8 0 D 1 2 4 3 1.first need read the first line as an array. then append the element in the proper position for file;   oldifs=$IFS…

粗略看完<Java Concurrency in Practice>这部书,确实是多线程/并发编程的一本好书.里面对各种并发的技术解释得比较透彻,虽然是面向Java的,但很多概念在其他语言的并发编程中,也可以用到.因此,开始写下其读书笔记,归纳总结. 闲话少说,从第十章开始,先上思维导图: 本章的重点,是死锁以及死锁的分析和避免方法. 10.1.1 锁的顺序产生死锁: public class WorkerThread implements Runnable{ private LeftRigh…

This content is part of the series: Java theory and practice A brief history of garbage collection Anatomy of a flawed microbenchmark Are all stateful Web applications broken? Be a good (event) listener Building a better HashMap Characterizing thread…

转自 http://boundary.cc/2013/05/java-app-server-develop/ by JOKER on 2013/05/05 最近状态不是很好,负能量堆到积爆表,静下心来看书写点东西才是出路.给瞎折腾的这两年,做个总结吧. 一些practice和总结 充分单元测试能帮助项目快速推进.看起来单元测试会增加开发时间,但事实上大多数时候它不但会缩短当前功能开发到release的时间,还能为后续的功能的开发做铺垫. 单元测试覆盖率必须保证绝大部分业务逻辑被覆盖.实践起来就是…

Problem Description Tomorrow is contest day, Are you all ready?We have been training for 45 days, and all guys must be tired.But , you are so lucky comparing with many excellent boys who have no chance to attend the Province-Final. Now, your task is…

// Jakarta Commons Loggingprivate static final Log log = LogFactory.getLog(MyClass.class);The above code also shows another good practice, which is to pass the Class object to the getLog() method, instead of a string. Why the java.util.logging.Logger…

The Last Practice Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 9226    Accepted Submission(s): 1960 Problem Description Tomorrow is contest day, Are you all ready?We have been training for 45…

The Last Practice Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 9037    Accepted Submission(s): 1905 Problem Description Tomorrow is contest day, Are you all ready?We have been training for 45…

A+B for Input-Output Practice (VIII) Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 135986    Accepted Submission(s): 41510 Problem Description Your task is to calculate the sum of some intege…

A+B for Input-Output Practice (VII) Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 62483    Accepted Submission(s): 41718 Problem Description Your task is to Calculate a + b.   Input The input…

A+B for Input-Output Practice (VI) Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 63087    Accepted Submission(s): 42387 Problem Description Your task is to calculate the sum of some integers.…

A+B for Input-Output Practice (V) Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 67443    Accepted Submission(s): 45101 Problem Description Your task is to calculate the sum of some integers.…

A+B for Input-Output Practice (IV) Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 90793    Accepted Submission(s): 48215 Problem Description Your task is to Calculate the sum of some integers.…

class Dianqi //创建电器类:父类 { private string _Dianqimingzi; public string Dianqimingzi { get { return _Dianqimingzi; } set { _Dianqimingzi = value; } } } class Computer:Dianqi //创建电脑类:子类 { private string _Diannaomingzi; public string Diannaomingzi { get…

The articles in this series are focused on individual Business Analysts and their managers. https://www.batimes.com/kathleen-hass/ba-practice-lead-handbook-1-why-is-business-analysis-taking-the-world-by-storm.html Global And Local Challenges Business…

比赛时间只有两个小时,我没有选做这题,因为当时看样例也看不懂,比较烦恼. 后来发现,该题对输入输出要求很低.远远没有昨天我在做的A题的麻烦,赛后认真看了一下就明白了,写了一下,一次就AC了,没问题,真心有点后悔. 来先看题目: C. Practice time limit per test 1 second memory limit per test 256 megabytes input input.txt output output.txt Little time is left befor…

Seven Steps to Success Machine Learning in Practice Project failures in IT are all too common. The risks are higher if you are adopting a new technology that is unfamiliar to your organisation. Machine learning has been around for a long time in acad…

成功素质1:一万小时与格物致知 “格物致知14”的概念,我是从张银奎11老师那里了解到的.它的意思是“推究事物的原理,从而获得知识”,跟我在<透过现象看本质 - 写在观看WWDC 2016 Keynote之后28>一文中所描述的 通过深入思考来探寻事物本质 有异曲同工之妙.我不知道多少读者朋友曾有过因探寻到事物本质而恍然大悟,豁然开朗的感觉:曾有过因格物致知而一叶知秋,举一反三的经历.那种感觉棒极了 要想达到格物致知的境界,一般要经过一万小时的训练.一万小时定律4主要是指: 不管你做什么事情,…

CCNA Exploration: 网络基础知识 (版本 4.0) A few things to keep in mind while completing this activity: 1 Do not use the browser Back button or close or reload any exam windows during the exam. 2 Do not close Packet Tracer when you are done. It will close aut…