Expressions 是一款Mac上的强大的正则表达式工具，简单易用，可以帮助开发者测试正则表达式，多种主题，选中高亮等，很不错！
[Expressions 在 Mac App Store上售价25元]
软件介绍
Expressions is an app to play with regular expressions. Easily and nicely.
Totally minimalistic, non–distractive user interface. Dark and light mode. Pattern syntax highlighting. Beautiful full screen view. Pattern and text group highlighting.
Expressions supports switching between pattern groups by pressing cmd+shift { and cmd+shift+}. Copying pattern can be escaped, so you can paste it directly into your code. And the other way round, of course (see Edit menu.) Thanks to "Allow whitespaces and comments" option, you can break pattern into parts which makes editing much simpler (see Preferences.)
软件截图
