This regular expression defines a pattern to identify character strings that are not made up of only "0" or "1". It can be used to check whether or not a string is valid as a binary number. For ...

The first time I ever encountered a regular expression was many years ago now, but I still remember my first thoughts on it: What is this string-like thing? I don’t want to touch it, it looks scary. I ...

This project contains two programs, one in JavaScript and one in PHP, that remove comments from a C program using regular expressions. The programs also identify and report invalid comments. "cycle.c" ...

「この文章には半角ハテナが含まれているか？」をmatchで調べようとしたらUncaught SyntaxError: Invalid regular expressionで落ちた話。 matchの引数として渡す比較用文字列を、正規表現であることを明記した上でエスケープしておく。ただクオーテーションで囲んで ...

I first heard about regular expression denial of service (ReDoS) vulnerabilities from GitHub's Dependabot. Several of my projects over the years have had dependencies that suffered from ReDoS ...