grep.app
Search across half a million public GitHub repositories in real-time. Regex-powered code search with language filters. Find how real projects implement patterns. Results show the surrounding lines, so you can judge whether a pattern is idiomatic before copying it.
Not sure how to add grep.app to your home screen? Step-by-step for Chrome, Safari, Firefox and Edge — it takes about ten seconds, and there is no app store involved.
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