How to delete an element which has a key which contains a certain substing using jq?

Question

I have the following JSON:

{
  "Category": [
    {
      "SomeKey_1": {
        "Property1": 1,
        "Property2": false
      }
    },
    {
      "SomeKey_2": {
        "Property1": 2,
        "Property2": true
      }
    },
    {
      "OtherKey_1": {
        "Property1": 3,
        "Property2": false
      }
    },
    {
      "OtherKey_2": {
        "Property1": 4,
        "Property2": false
      }
    }
  ]
}

and I would like to delete from the Category[] array those element whose key starts with or contains "Other". So as the result I would like to have this:

{
  "Category": [
    {
      "SomeKey_1": {
        "Property1": 1,
        "Property2": false
      }
    },
    {
      "SomeKey_2": {
        "Property1": 2,
        "Property2": true
      }
    }
  ]
}

I tried to use the Select command but there I am able to select based on the values not the keys.

Answer 1

If all the objects in your array only contain a single property:

.Category |= map(select(keys_unsorted[0] | contains("Other") | not))

If you want to delete objects of which any property's key starts with "Other":

.Category |= map(select(any(keys_unsorted[]; contains("Other")) | not))

And finally, if you only want to delete those objects with only "Other" properties:

.Category |= map(select(all(keys_unsorted[]; contains("Other")) | not))

It's also possible to use the del filter:

del(.Category[] | select(keys_unsorted[0] | contains("Other")))
del(.Category[] | select(any(keys_unsorted[]; contains("Other"))))
del(.Category[] | select(all(keys_unsorted[]; contains("Other"))))