Question 1

How does Kazaam compare to Jolt for JSON transformations?

Accepted Answer

Kazaam is inspired by Jolt but implemented in Go, offering similar declarative specs with a focus on performance. While Jolt is Java-based, Kazaam provides Go-native integration and additional transforms like UUID generation, making it better for Go-centric projects.

Question 2

How to handle arrays with Kazaam shift operation?

Accepted Answer

Use JSONPath-like syntax with [*] for wildcards or specific indices. For example, 'allGuids': 'doc.guidObjects[*].id' extracts all IDs from an array of objects, as shown in the README's shift transform examples.

Question 3

Can Kazaam transform JSON with conditional logic?

Accepted Answer

Kazaam primarily uses declarative specs; for complex conditions, you might need to chain transforms or use custom transforms. Built-in operations like coalesce handle simple fallbacks, but advanced logic requires extension via custom code.

Question 4

What's the performance impact of using Kazaam in high-throughput systems?

Accepted Answer

Kazaam is designed for speed by minimizing validation overhead. While benchmarks aren't provided, its design choices, such as skipping full JSON validation, suggest it's optimized for processing large volumes of JSON messages efficiently in Go applications.

Question 5

How to install and use Kazaam as a Go module?

Accepted Answer

Use 'go get gopkg.in/qntfy/kazaam.v3' (or v4 as per docs) to fetch the library. The README includes examples of importing and using it in Go code, with a binary available for testing specs via the executable program setup.

Question 6

Does Kazaam support error handling for missing paths?

Accepted Answer

Yes, operations like shift and concat support a 'require' field that, when set to true, throws an error if source paths are missing. However, error messages might be generic, so debugging complex specs can be challenging.

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