jq_eccentric_command.md

jq -s '{ response: [( (.[0].response | sort_by(.name)) as $a | (.[1].response | sort_by(.name)) as $b | ($a | length) as $length | $a[] as $item | $item + $b[range(0;$length)] )] }' a.json b.json

a.json

{
  "response": [
    {
      "station_ja": "新宿",
      "lines": [
        "yamanote",
        "chuo"
      ]
    },
    {
      "station_ja": "代々木",
      "lines": [
        "yamanote",
        "chuo"
      ]
    },
    {
      "station_ja": "千駄ヶ谷",
      "lines": [
        "chuo"
      ]
    }
  ]
}

b.json

{
  "response": [
    {
      "station_ja": "新宿",
      "station_en": "Shinjuku"
    },
    {
      "station_ja": "代々木",
      "station_en": "Yoyogi"
    },
    {
      "station_ja": "千駄ヶ谷",
      "station_en": "Sendagaya"
    }
  ]
}

output

{
  "response": [
    {
      "station_ja": "新宿",
      "lines": [
        "yamanote",
        "chuo"
      ],
      "station_en": "Shinjuku"
    },
    {
      "station_ja": "代々木",
      "lines": [
        "yamanote",
        "chuo"
      ],
      "station_en": "Yoyogi"
    },
    {
      "station_ja": "千駄ヶ谷",
      "lines": [
        "yamanote",
        "chuo"
      ],
      "station_en": "Sendagaya"
    },
    {
      "station_ja": "新宿",
      "lines": [
        "yamanote",
        "chuo"
      ],
      "station_en": "Shinjuku"
    },
    {
      "station_ja": "代々木",
      "lines": [
        "yamanote",
        "chuo"
      ],
      "station_en": "Yoyogi"
    },
    {
      "station_ja": "千駄ヶ谷",
      "lines": [
        "yamanote",
        "chuo"
      ],
      "station_en": "Sendagaya"
    },
    {
      "station_ja": "新宿",
      "lines": [
        "chuo"
      ],
      "station_en": "Shinjuku"
    },
    {
      "station_ja": "代々木",
      "lines": [
        "chuo"
      ],
      "station_en": "Yoyogi"
    },
    {
      "station_ja": "千駄ヶ谷",
      "lines": [
        "chuo"
      ],
      "station_en": "Sendagaya"
    }
  ]
}