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CodeChain Dev Guides, runnable JS & interview prep
Guides · Live JS Practice · Interview Prep

Build, run, and interview-ready answers for mobile developers.

Practical Android, Kotlin, React Native and JavaScript guides with runnable snippets, clear explanations, and interview-style walkthroughs — built for working developers.

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Use guides as drills: read the problem, run the JavaScript where available, then check the verified solution. Browse interview Q&A or ask about a topic you want covered next.

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