匹配任何单个字符。例如正则表达式r.t匹配这些字符串：rat、rut、r t，但是不匹配root。 $ 匹配行结束符。例如正则表达式weasel$ 能够匹配字符串"He's a weasel"的末尾，但是不能匹配字符串"They are a bunch of weasels."。 ^ 匹配一行的开始。例如正则表达式^When in能够匹配字符串"When in the course of human events"的开始，但是不能匹配" ;What and When in the"。
drozer (formerly Mercury) is the leading security testing framework for Android. drozer allows you to search for security vulnerabilities in apps and devices by assuming the role of an app and interacting with the Dalvik VM, other apps' IPC endpoint
Solve a variety of real-world programming and logic problems by leveraging the power of C++17 Test your skills in using language features, algorithms, data structures, design patterns, and more Explore areas such as cryptography, communication, and
