使用jq过滤json数据中的对象键的较短结构

{
  "name": "John",
  "age": 30,
  "address": {
    "street": "123 Main St",
    "city": "New York"
  }
}

jq 'to_entries | map(select(length(.key) <= 5)) | from_entries'

{
  "name": "John",
  "age": 30
}

{
  "name": "John",
  "age": 30,
  "address": {
    "street": "123 Main St",
    "city": "New York"
  },
  "contacts": [
    {
      "name": "Jane",
      "phone": "123-456-7890"
    },
    {
      "name": "Bob",
      "phone": "987-654-3210"
    }
  ]
}

jq 'walk(if type == "object" then with_entries(select(length(.key) <= 5)) else . end)'

{
  "name": "John",
  "age": 30,
  "address": {
    "city": "New York"
  },
  "contacts": [
    {
      "name": "Jane"
    },
    {
      "name": "Bob"
    }
  ]
}