Converting Shell Output to json -

i want convert output of octave execution in shell json format.

for example if execute

$ octave --silent --eval 'a=[1,3],b=2'

a =     1   3  b =  2

i want output formatted json string in

"{'a':[1,3], 'b':2}"

how achieve this, great if in node/js, anthing fine. looking existing solutions rather writing own logic parsing it. need suggestion.

i doubt if such package exists. easy write own rather thank waiting find one.

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