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推荐系统算法初探 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...推荐给用户; 冷启动问题。当有一名新用户或者新物品进入系统时,推荐将无从依据; 在一些item生存周期短(如新闻、广告)的系统中,由于更新速度快,大量item不会有用户评分,造成评分矩阵稀疏,不利于这些内容的推荐...
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What is a proper naming convention for MySQL FKs?

...d Oct 2 '19 at 11:44 Văn QuyếtVăn Quyết 1,30577 silver badges2121 bronze badges ...
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为什么说自媒体到了最危险的时期? - 资讯 - 清泛网 - 专注C/C++及内核技术

...媒体行业的虚火旺盛,创业公司对于品牌的需求旺盛,且进入门槛很低,所以导致了周边大量人员不断流入这个领域。有个90后在交流时说,他之前是地产行业运营微信的,但是现在他不想干了。“我想去当科技自媒体,地产界...
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Detecting a mobile browser

... Google TV is Android too. What define a mobile ? Screen Size ? Touch ? deviceOrientation ? When i design it's more a question of mousehover or not, big bouton or small links. So, for now, i run with "if (Modernizr.touch)" :) ...
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FloatingActionButton 扩展:悬浮操作按钮扩展,可自定义颜色、大小、位置...

...6. 动态按钮组 根据上下文动态创建按钮: 当 进入编辑模式 调用 FloatingActionButton1.SetFabIcon 设置图标为"edit.png" 调用 FloatingActionButton1.CreateFab 创建按钮 位置X为50 位置Y为500 大小为48 当 生成的按钮点击 按钮索引 ...
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When should I use a table variable vs temporary table in sql server?

... @Syed. Generally less for TV. Locks can be released earlier if inside a user transaction . Also see the Bob Ward link. – Martin Smith Apr 6 '18 at 6:50 ...
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30岁之后,程序员该向什么方向发展? - 杂谈 - 清泛网 - 专注C/C++及内核技术

...选择。 如果是“被”选择,如果是为了学习,当然是要进入有牛人带的团队;如果是为了工作,就是自己技术能力相当不错了,要选择自己能施展才能、做出贡献的团队。 如果是团队选择人的话,我通常是选择学习能力强、...
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Significant new inventions in computing since 1980

...ications. Suddenly games seemed less like hard work and more like watching TV, which opened the doors for Sega, Nintendo, Atari et al to bring consumer gaming into the home. Media compression (MP3s and video files). And a whole bunch of things - like TiVO and iPods - that we don't really think of as...
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How do I iterate over an NSArray?

...ust 400 times longer! thats 40,000% longer!). Header: // Array_Speed_TestViewController.h // Array Speed Test // Created by Mehmet Akten on 05/02/2009. // Copyright MSA Visuals Ltd. 2009. All rights reserved. #import <UIKit/UIKit.h> @interface Array_Speed_TestViewController : UIView...
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如果携程决心战略性亏损到底,去哪儿怕是只剩一条路可走 - 资讯 - 清泛网 -...

...公布了2015年Q1财报(财报发布后携程市值一举达到101亿,进入百亿美金俱乐部),财报显示营收同比增长46%,却亏了1.26亿,与之对应的是但去年同期尚有1.15亿净利润,但同比增长仅27%。同时这是携程继2014年Q4后净亏损为2.24亿...