A reference for everyday tasks in Swift, Python, C, C++, Java, C#, JavaScript, Rust, Go, Delphi, PHP, Ruby, Objective-C, Kotlin, TypeScript, Clojure, Bash and SQL.
One purchase, yours for good: no subscription, no ads, no in-app purchases.
• Over 1,000 topics, including strings, collections, files, networking, concurrency, regular expressions, design patterns.
• Language changes by version: 963 changes in 165 language versions, with before-and-after code.
• Keyword and function reference for all 18 languages: over 3,700 articles. Browse, search, or tap a word in the code to open its article.
• SQL: 202 queries (JOIN, GROUP BY, subqueries, data types); more than half run on a real practice database.
• Run in the app: the output appears directly below the code, no IDE or compiler needed. More than 85% of examples run. Requires an internet connection; up to 80 runs a day.
• Search covers the code itself, not just titles: type a fragment you remember and find the example.
• Edit examples or add your own; your changes and additions are saved in the app.
• Everything except running code works offline: examples, reference, search, favorites.
• Easy on the eyes: light and dark themes, your choice of font and size, line numbers, and long lines that wrap instead of spilling off the screen.
Examples are curated from professional sources and checked before release: the code works and is easy to follow.
Built by a developer for developers. The CodePro project has been in active development since 2015.
