Rust - using error-chain to report stack traces on errors occurred.

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Github
https://github.com/rust-lang-nursery/error-chain

Example)
https://github.com/rust-lang-nursery/error-chain/blob/master/examples/quickstart.rs

Java - JFR create a new configuration from existing one

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Creating a new custom(custom.jfc) JFR configuration from the existing profile.jfc

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Nice example how Javascript can have a unit test with fetch call by mocking.

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Signal will be standard in JavaScript?

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LangChain JS example with Llama cpp for embeddings and prompt.