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What is Codable in Swift?
Updated May 6, 2026
Short answer
Codable is used for encoding and decoding data.
Deep explanation
Combines Encodable and Decodable protocols for JSON parsing.
Real-world example
Parsing API JSON responses.
Common mistakes
- Mismatched keys causing decoding failures.
Follow-up questions
- What is JSONDecoder?
- How to handle custom keys?