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Looking at the source[1] it stands at 94 lines. There's also no example of field extraction in the readme even though it's mentioned that there is an example below in the features section.

[1] https://github.com/izabera/j/blob/master/j

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the parser is 20 lines. then there's a function named print, then there's a for loop that extracts the fields. the last two lines of the readme are the example you're looking for:

$ ./j 'obj->"foo"' 'arr->1' 'obj->"baz"' <<< '{"foo":["bar",{"baz":"bat"}]}'

"bat"

Thanks for clarifying both here as a reply and in the README[1] itself.

[1] https://github.com/izabera/j/commit/24e0c49e38c63c4f96f01725...

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