Bash output array from JSON object names

Question

I'm trying to extract object names from JSON so that I can iterate over them. Here's my JSON:

{
    "Resources": {
        "vpc": {
            "cidr": "192.168.1.0/24",
            "dns_resolution": "TRUE"
        },
        "subnet": {
            "cidr": "192.168.1.0/24",
            "availability_zone": "us-west-1a"
        }
    }
}

This should return an array, like this:

echo ${array[@]}
vpc subnet

technico · Accepted Answer · 2016-08-04 20:55:52Z

1

You will need a JSON parser to achieve this. You can use "jq", available on https://stedolan.github.io/jq/

You can play with it before installing it on https://jqplay.org/ , to check it will be able to do what you want, and to learn how.

answered Aug 4, 2016 at 20:55

technico

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1 Comment

user94559 Over a year ago

Specifically, cat yourdata.json | jq '.Resources | keys | join(" ")' -r should give you the desired output in the original question.

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