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掘金是一个帮助开发者成长的社区,是给开发者用的 Hacker News,给设计师用的 Designer News,和给产品经理用的 Medium。掘金的技术文章由稀土上聚集的技术大牛和极客共同编辑为你筛选出最优质的干货,其中包括：Android、iOS、前端、后端等方面的内容。用户每天都可以在这里找到技术世界的头条内容。与此同时,掘金内还有沸点、掘金翻译计划、线下活动、专栏文章等内容。即使你是 GitHub、StackOverflow、开源中国的用户,我们相信你也可以在这里有所收获。

Codewars is where developers achieve code mastery through challenge. Train on kata in the dojo and reach your highest potential.

Stack Overflow is the largest, most trusted online community for developers to learn, share​ ​their programming ​knowledge, and build their careers.

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VisuAlgo was conceptualised in 2011 by Dr Steven Halim as a tool to help his students better understand data structures and algorithms, by allowing them to learn the basics on their own and at their own pace. Together with his students from the National University of Singapore, a series of visualisations were developed and consolidated, from simple sorting algorithms to complex graph data structures. Though specifically designed for the use of NUS students taking various data structure and algorithm classes (CS1010, CS1020, CS2010, CS2020, and CS3233), as advocators of online learning, we hope that curious minds around the world will find these visualisations useful as well.