Add/modify element for each object in array using jq [duplicate]

Question

How can I add, or modify if the element already exists, an element for each object in an array using jq?

For example going from:

[
    {
        "firstname": "Sophie",
        "lastname": "Haydock"
    },
    {
        "firstname": "Toussaint",
        "lastname": "Louverture"
    }
]

to

[
    {
        "firstname": "Sophie",
        "lastname": "Haydock",
        "common": "something"
    },
    {
        "firstname": "Toussaint",
        "lastname": "Louverture",
        "common": "something"
    }
]

This is different from the question marked as duplicate in that it adds an element to an object in an array rather than add an object to an array.

that other guy · Accepted Answer · 2019-10-03 22:56:31Z

3

To do something with each element in an array, use map:

jq 'map(.common="something")'

answered Oct 3, 2019 at 22:56

that other guy

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