How to insert a field at the top of an object?-CodePudding

This is my code

element='{"x":"zero"}'
example='[
{
  "a":"one",
  "b":"two",
  "c":"three"
},
{
  "d":"four",
  "e":"five",
  "f":"six"
}]'

jq --argjson el "$element" '.[]  = $el' <<< $example

It currently outputs

[
  {
    "a":"one",
    "b":"two",
    "c":"three",
    "x":"zero"
  },
  {
    "d":"four",
    "e":"five",
    "f":"six",
    "x":"zero"
  }
]

But i would like to have the "x":"zero" be the first element of all array elements, not the last.

Inverting the variable with the .[] iterator would make no sense. Any idea how this can be done?

CodePudding user response：

In order for the new field to appear at the top, the object that holds it must appear first in the addition statement. For example:

$ jq  --argjson el "$element"  'map($el   .)'  <<< $example
[
  {
    "x": "zero",
    "a": "one",
    "b": "two",
    "c": "three"
  },
  {
    "x": "zero",
    "d": "four",
    "e": "five",
    "f": "six"
  }
]