Question

我试图弄清楚如何使用具有映射和分组功能的lodash将我的JSON文章分组。总的来说，我对lodash和javascript还是很陌生，但是我已经很接近了，但无法弄清楚格式化的最后一点！

我尝试过的

    const data = [{
      "pcc": "1ADA",
      "markets": {
        "origin": "ORG",
        "destination": "DES"
      }
    }, {
      "pcc": "1ADA",
      "markets": {
        "origin": "ORD",
        "destination": "DES"
      }
    },{
      "pcc": "1ADA",
      "markets": {
        "origin": "ORG",
        "destination": "DES"
      }
    }, {
      "pcc": "1AZA",
      "markets": {
        "origin": "ORG",
        "destination": "DES"
      }
    }, {
      "pcc": "1AXA",
      "markets": {
        "origin": "ORG",
        "destination": "DES"
      }
    }]

    excelDef = _(data)
      .groupBy("pcc")
      .map((group, pcc) =>({
        pcc,
        markets: group.map(({origin, markets: destination}) => ({
          origin,
          destination
        }))
      }))
      .value();

我得到的输出

 [{
      "pcc": "1ADA",
      "markets": [{
        "destination": {
          "origin": "ORG",
          "destination": "DES"
        }
      }, {
        "destination": {
          "origin": "ORD",
          "destination": "DES"
        }
      }, {
        "destination": {
          "origin": "ORG",
          "destination": "DES"
        }
      }]
    }, {
      "pcc": "1AZA",
      "markets": [{
        "destination": {
          "origin": "ORG",
          "destination": "DES"
        }
      }]
    }, {
      "pcc": "1AXA",
      "markets": [{
        "destination": {
          "origin": "ORG",
          "destination": "DES"
        }
      }]
    }]

所需的输出

[{
"pcc": "1ADA",
"markets": [{
    "origin": "ORG",
    "destination": "DES"
}, {
    "origin": "ORD",
    "destination": "DES"
}, {
    "origin": "ORG",
    "destination": "DES"
}]
}, {
 "pcc": "1AZA",
 "markets": [{
    "origin": "ORG",
    "destination": "DES"
}]
}, {
 "pcc": "1AXA",
 "markets": [{
    "origin": "ORG",
    "destination": "DES"
  }]
}]

我感觉自己已经接近所需的输出，但是映射和分组功能的语法总是让我不满意作为开始编程的人。任何帮助将不胜感激！

Answer 1

以另一种方式，如果没有protected static function rawQuery ($query, array $params = null) { if ($params === null) { $params = []; } $stmt = static::getPdo()->prepare($query); $stmt->setFetchMode(PDO::FETCH_ASSOC); $stmt->execute($params); $results = $stmt->fetchAll(); return $results; }，则可以使用lodash：

reduce

如何使用lodash将多嵌套JSON文章分组？

1 个答案: