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by alpatters 4629 days ago
"None of these libraries (or many others) have competing implementations written in other languages."

Except the ones they were written to copy. Each example you give is an open-sourced clone of an pre-existing version implemented in a different language.
1 comments
sfjailbird 4629 days ago
That's not true at all, Lucene is a Java project from the beginning, and has since been copied to virtually every other environment because it is such a kick-ass indexing engine.
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alpatters 4628 days ago
So in no way did they copy Google's which is implemented in C++ ?

Though I agree with OP - these projects and Java are here to stay for the foreseeable future.

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chatman 4628 days ago
No, they didn't copy any of Google's implementation. They simply implemented efficiently the TF-IDF based document retrieval model.
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