Design a simplified version of Twitter where users can post tweets, follow/unfollow another user and is able to see the 10 most recent tweets in the user's news feed. Your design should support the following methods: postTweet(userId, tweetId): Compo…

设计一个简化版的推特(Twitter),可以让用户实现发送推文,关注/取消关注其他用户,能够看见关注人(包括自己)的最近十条推文.你的设计需要支持以下的几个功能:    postTweet(userId, tweetId): 创建一条新的推文    getNewsFeed(userId): 检索最近的十条推文.每个推文都必须是由此用户关注的人或者是用户自己发出的.推文必须按照时间顺序由最近的开始排序.    follow(followerId, followeeId): 关注一个用户    un…

Design a simplified version of Twitter where users can post tweets, follow/unfollow another user and is able to see the 10 most recent tweets in the user's news feed. Your design should support the following methods: postTweet(userId, tweetId): Compo…

//先定义一个数据结构,代表一条微博,有两个内容:发布者id,微博id(代表微博内容) class TwitterData { int userId; int twitterId; public TwitterData(int userId,int twitterId) { this.twitterId = twitterId; this.userId = userId; } } //用一个map存储用户和各用户的关注用户 Map<Integer,Set<Integer>> use…

二刷尝试了别的办法,用MAP代表关注列表. 然后不初始化,但是只要有用户被使用,而他又不在MAP里,就把他加进去,然后让他关注自己.. 但是这样做超时了. 问题在于这个题解法太多,有很多不同的情况. STACK记录所有推,然后找10个,那太难了,可能某个用户关注的只是几亿里面的某些人,搜索起来很要命. 那可以某人发推,就给所有关注他的人推一下.A关注B的时候,A刷新自己的推特队列,按时间顺序重新查找.这样比较符合现状,但是假如我有几亿关注者,每发一个就要刷新所有人的列表,这个还好.但是,每多一个…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 日期 题目地址:https://leetcode.com/problems/design-twitter/description/ 题目描述 Design a simplified version of Twitter where users can post tweets, follow/unfollow another user and is a…

https://leetcode.com/problems/design-twitter/ Design a simplified version of Twitter where users can post tweets, follow/unfollow another user and is able to see the 10 most recent tweets in the user's news feed. Your design should support the follow…

题目描述: Design a simplified version of Twitter where users can post tweets, follow/unfollow another user and is able to see the 10 most recent tweets in the user's news feed. Your design should support the following methods: postTweet(userId, tweetId):…

355. 设计推特 设计一个简化版的推特(Twitter),可以让用户实现发送推文,关注/取消关注其他用户,能够看见关注人(包括自己)的最近十条推文.你的设计需要支持以下的几个功能: postTweet(userId, tweetId): 创建一条新的推文 getNewsFeed(userId): 检索最近的十条推文.每个推文都必须是由此用户关注的人或者是用户自己发出的.推文必须按照时间顺序由最近的开始排序. follow(followerId, followeeId): 关注一个用户 unfo…

使用MATLAB 2019 App Design 工具设计一个 电子日记App1.1 前言:由于信号与系统课程需要,因此下载了MATLAB软件,加之对新款的执着追求,通过一些渠道,下载了MATLAB 2019专业版.在使用过程中我发现该软件居然内含一款app设计工具,回想起之前使用Java swing编写用户交互时按照坐标确定模块位置时的苦涩,该工具的拖拉式布局极大的吸引了我,而且添加了回调函数功能,这一低门槛让许多不懂得编程的同学也有了编写个性化程序的可能,于是本着"君子动手不动口的原则&qu…

Design Principle vs Design Pattern设计原则 vs 设计模式 来源:https://www.tutorialsteacher.com/articles/difference-between-design-principle-and-design-pattern In software engineering, design principle and design pattern are not the same.在软件工程中,设计原则和设计模式是不同的. Des…

Implement a simple twitter. Support the following method: postTweet(user_id, tweet_text). Post a tweet.getTimeline(user_id). Get the given user's most recently 10 tweets posted by himself, order by timestamp from most recent to least recent.getNewsFe…

这个问题你一定想过,在移动用户体验设计领域中,如何设计好一条简单的推送通知. 你注意过么,每天从不同的 App 上收到的大量的推送通知与提醒,这些通知里有多少你真的有兴趣? 每天,用户对各种没用的通知应接不暇,这些通知让他们分散注意力,甚至成为了骚扰.骚扰的通知是用户卸载移动应用的首要原因(71% 的被调查者) 经过设计的.对用户有用.有相关性的通知,是非常重要的.为了提高参与度,通知是公司能够直接与用户交互,在正确的时间.地点,发送正确的消息最强大的工具. 下面让我们看看,如何把这个反用户体验…

Design a HashMap without using any built-in hash table libraries. To be specific, your design should include these functions: put(key, value) : Insert a (key, value) pair into the HashMap. If the value already exists in the HashMap, update the value.…

Design a HashSet without using any built-in hash table libraries. To be specific, your design should include these functions: add(value): Insert a value into the HashSet. contains(value) : Return whether the value exists in the HashSet or not. remove…

题目连接 https://leetcode.com/problems/design-twitter Design Twitte Description Design a simplified version of Twitter where users can post tweets, follow/unfollow another user and is able to see the 10 most recent tweets in the user’s news feed. Your de…

Human Interface Design It’s not enough to create an app that works. Users expect Mac apps to be powerful, intuitive, and engaging. Think about the user experience as you design every aspect of your app, from the features you choose to the pointer you…

近期開始研究最新的Android 5 Material Design,一加氢OS公布后,非常快就有一大批支持Android5原生风格的手机出来了,你的App还是UI帮设计的吗?该考虑升级到 Material Design风格了, 这年头要与时俱进啊,不学习就out了. 这个系列的文章不错,给大家共享下 , 源代码Git地址  https://github.com/frogermcs/InstaMaterial InstaMaterial 概念设计(第九部分) - 图片的公布2015-05-09…

这是我在2018年4月写的英语演讲稿,可惜没人听得懂(实际上就没几个人在听). 文章的内容是我从此前做过的项目中总结出来的经验,从我们的寝室铃声入手,介绍了可扩展性.兼容性与可复用性等概念,最后提出良好的设计应该平衡这些特性与性能.成本之间的三角关系. 第一次用英文写有一点专业性的东西,不知道算不算好. 以下为原文: Design Principles Intro One day, on the noticeboard in our dormitory, there was a paper sa…

Note: For the coding companion problem, please see: Encode and Decode TinyURL. How would you design a URL shortening service that is similar to TinyURL? Background:TinyURL is a URL shortening service where you enter a URL such as https://leetcode.com…

ylbtech-Design:设计目录 1.返回顶部 1.0 蚂蚁设计 https://design.alipay.com 1.1 Ant Design - 一个 UI 设计语言 https://ant.design 1.1 Ant Design Mobile - 移动端设计规范 https://mobile.ant.design 1.1 Ant Design Pro - 开箱即用的中台前端/设计解决方案 https://pro.ant.design 2.0 蚂蚁设计 -  生态 2.1 Ant…

ylbtech-Design:设计(活动)百科 设计是把一种设想通过合理的规划.周密的计划.通过各种感觉形式传达出来的过程.人类通过劳动改造世界,创造文明,创造物质财富和精神财富,而最基础.最主要的创造活动是造物.设计便是造物活动进行预先的计划,可以把任何造物活动的计划技术和计划过程理解为设计. 1.返回顶部 1. 中文名:设计 外文名:Design 特    点:设计的速度.准确性.信息量 分    类:平面设计.装修设计.服装设计等 目录 1 基本含义 2 词语概念 ▪ 基本信息 ▪ 基本解…

Design a Tic-tac-toe game that is played between two players on a n x n grid. You may assume the following rules: A move is guaranteed to be valid and is placed on an empty block.Once a winning condition is reached, no more moves is allowed.A player…

A mix of hashmap, list and heap. struct Tw { Tw(long long pts, int tid) { ts = pts; tweetid = tid; } long long ts; int tweetid; }; struct Cmp { bool operator()(const Tw &a, const Tw &b) { return a.ts > b.ts; } }; class Twitter { long long ts; u…

2nd order RC Low-pass Filter Center frequency    fc = 23405.13869[Hz] Q factor                  Q = 0.333333333333 Sallen–Key topology http://en.wikipedia.org/wiki/Sallen%E2%80%93Key_topology A low-pass filter, which is implemented with a Sallen–Key…

CODE: #!/usr/bin/python # -*- coding: utf-8 -*- ''' Created on 2014-7-24 @author: guaguastd @name: extract_retweet_attributions.py ''' if __name__ == '__main__': # import login, see http://blog.csdn.net/guaguastd/article/details/31706155 from login i…

Note: For the coding companion problem, please see: Encode and Decode TinyURL. How would you design a URL shortening service that is similar to TinyURL? Background:TinyURL is a URL shortening service where you enter a URL such as https://leetcode.com…

［抄题］: Design a Tic-tac-toe game that is played between two players on a n x n grid. You may assume the following rules: A move is guaranteed to be valid and is placed on an empty block. Once a winning condition is reached, no more moves is allowed. A…

题目标签:HashMap 题目让我们设计一个 hashmap, 有put, get, remove 功能. 建立一个 int array, index 是key, 值是 value,具体看code. Java Solution: Runtime: 76 ms, faster than 27.53% Memory Usage: 58.2 MB, less than 31.57% 完成日期:03/18/2019 关键点:int array class MyHashMap { int [] map;…

题目标签:HashMap 题目让我们设计一个 hashset,有add,contains,remove 功能. 建立一个boolean array,index 是数字的值,具体看code. Java Solution: Runtime: 58 ms, faster than 90.21% Memory Usage: 56.3 MB, less than 68.53% 完成日期:03/18/2019 关键点:boolean array class MyHashSet { boolean [] se…