LeetCode

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

51CTO是中国领先的IT技术在线学习平台和中国最大的IT技术社区之一，以服务IT技术人员职业成长为己任，对中国数千万IT技术人员拥有强大的影响力和服务能力。通过技术社区、技术博客和新媒体矩阵等综合产品服务体系，凝聚了2000万+IT技术人员、50万+位技术博主和近千家IT公司的CTO；通过丰富且高质量的IT技术在线教育资源，完整覆盖就业培训、在职提升、认证考试等职业教育领域，分别打造企业培训、个人提升创新产品矩阵，服务IT人才成长。同时，作为华为鸿蒙操作系统战略合作伙伴，51CTO承担了鸿蒙官方技术社区的运营，全力服务于鸿蒙开发者生态。

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.

在线工具,开发人员工具,代码格式化、压缩、加密、解密,下载链接转换,sql工具,正则测试工具,favicon在线制作,字帖工具,中文简繁体转换,迅雷下载链接转换,进制转换,二维码

Powerful coding training system. LintCode has the most interview problems covering Google, Facebook, Linkedin, Amazon, Microsoft and so on. We provide Chinese and English versions for coders around the world.

GeeksforGeeks | A computer science portal for geeks