51CTO

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

腾讯网从2003年创立至今，已经成为集新闻信息，区域垂直生活服务、社会化媒体资讯和产品为一体的互联网媒体平台。腾讯网下设新闻、科技、财经、娱乐、体育、汽车、时尚等多个频道，充分满足用户对不同类型资讯的需求。同时专注不同领域内容，打造精品栏目，并顺应技术发展趋势，推出网络直播等创新形式，改变了用户获取资讯的方式和习惯。

Codewars is a coding practice site for all programmers where you can learn various programming languages. Join the community and improve your skills in many languages!

艾瑞网聚合互联网数据资讯，融合互联网行业资源，提供电子商务、移动互联网、网络游戏、网络广告、网络营销等行业内容，为互联网管理营销市场运营人士提供丰富的产业数据、报告、专家观点、行业数据库等服务，打造最具影响力的互联网数据资讯聚合平台。

GitHub is where over 73 million developers shape the future of software, together. Contribute to the open source community, manage your Git repositories, review code like a pro, track bugs and features, power your CI/CD and DevOps workflows, and secure code before you commit it.

火山引擎，全球先进的企业技术服务，助力企业数字化转型，赋能组织智能化升级，驱动业务前行

Welcome To PKU JudgeOnline

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 visualizations 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/equivalent, CS2040/equivalent, CS3230, CS3233, and CS4234), as advocators of online learning, we hope that curious minds around the world will find these visualizations useful as well.