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Given an input json string of keys from an array, return an object with only the entries that had keys in the original object and in the input array.
I have a solution but I think that it isn't elegant ({($k):$input[$k]} feels especially clunky...) and that this is a chance for me to learn.
jq -n '{"1":"a","2":"b","3":"c"}' \ | jq --arg keys '["1","3","4"]' \ '. as $input | ( $keys | fromjson ) | map( . as $k | $input | select(has($k)) | {($k):$input[$k]} ) | add' Any ideas how to clean this up?
I feel like Extracting selected properties from a nested JSON object with jq is a good starting place but i cannot get it to work.
321
jp is a JSON processor for the command line using JSONPath (aka "a simpler jq, and with JSONPath").
A jq program is a "filter": it takes an input, and produces an output. There are a lot of builtin filters for extracting a particular field of an object, or converting a number to a string, or various other standard tasks.
The slurp option ( -s ) changes the input to the jq program. It reads all the input values and build an array for the query input. Using with the raw input option ( -R ) means reading the entire input as a string. The inputs function is a special stream that emits the remaining JSON values given to the jq program.
solution with inside check:
jq 'with_entries(select([.key] | inside(["key1", "key2"])))' You can use this filter:
with_entries( select( .key as $k | any($keys | fromjson[]; . == $k) ) ) If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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