Questions about JavaExtractor's hash function

[utkarsh-agrawaal]

Hi, I am trying to extend code2vec for Javascript. So far,I have been able to extract paths. I have a few questions about the final form of my_dataset.val.c2v.
What was the hash function used for paths? Did you use a standard hash function like sha1 or md5
Do you unhash the hashed string somewhere in the program?
Are the arrows in the path (up, down) really important?

[urialon]

Hi,
Thank you for your interest in Code2vec.
I'm just letting you know that the encoder of code2seq is much better than code2vec's and does not use hashing. The implementation and extending to other languages is very similar.

Regarding your questions:

1. The hash function was simply Java's String#hashCode().
2. No, there is no need to unhash.
3. I am guessing that the arrows contribute only a few additional points. You can definitely drop them as a first step. In our PLDI'18 paper - without arrows the results were very similar (for other tasks and another language though)

Best,
Uri

[utkarsh-agrawaal]

Thank you for your prompt reply!

[utkarsh-agrawaal]

So ideally I should be okay with using any hash function then?

[urialon]

Yes! It is only intended to shorten the long path strings into shorter strings.