Filtering JSON list in shell using jq

Question

Input :

{ "names" : ["name1","name2","name3","pat_name4"] }

Needed output :

{ "names" : ["name1","name2","name3"] }

Currently what i have by running command, to filter out all names starting with pat_

cat file | jq .names | grep -Ev '^(pat_)'

is this

["name1","name2","name3"]

Was wondering if there is some alteration to the jq command that could be done to get in the format needed.

Answer 1

With your input, the invocation:

$ jq -c '.names |= map(select(test("^pat_")|not))' 

produces:

{"names":["name1","name2","name3"]}