javascript - 从键中检索值数组

Question

我正在尝试遍历我拥有的 JSON 对象，以检索元素列表。

我正在筛选的 JSON 代码非常复杂，但这里是一小段代码。它基本上显示了我正在寻找的内容。

{
  "ProductsList": [
    {
      "ProductInfo": {
        "Brand": "LG",
        "p_product_barcode": "048231014731",
        "p_product_bullets_json": {
          "Value": [
            "4.3 cubic foot ",
            "Recognized",
            "Customize your washer",
            "6Motion Technology ",
            "Troubleshoot quickly",
            "meow",
            "who",
            "special"
          ]
        }
    }]
}

我正在尝试从“p_product_bullets_json”中的“Value”获取值列表。我想得到所有的元素。

到目前为止我有这个，但我得到的只是一个空列表。

function getLists(obj, key) {

    // Empty object array
    var objects = [];

    // Searches through the JSON code to find the given key
    for (var k in obj) {

        // If there are still leafs left, then keep searching
        if (!obj.hasOwnProperty(k)) continue;

        // If the leaf doesn't match the key, try again (recursion)
        if (typeof obj[k] == 'object') {

            objects = objects.concat(getValues(obj[k], key));

        // If the leaf does match the key, then push that value onto the array
        } else if (k == key) {

            $.each(obj[k], function(i, val) {

                console.log('Key: ' + i + '  Val: ' + val)

            });
        }
    }

    return objects;
}

我只是查看“值”的每个键，但这个名称不是唯一的，在其他地方还有其他具有相同名称的键。

如有帮助，将不胜感激，谢谢!

Answer 1

你需要有一种情况，你从那个函数返回一个数组，试试这个:

var input = {
  "ProductsList": [
    {
      "ProductInfo": {
        "Brand": "LG",
        "p_product_barcode": "048231014731",
        "p_product_bullets_json": {
          "Value": [
            "4.3 cubic foot ",
            "Recognized",
            "Customize your washer",
            "6Motion Technology ",
            "Troubleshoot quickly",
            "meow",
            "who",
            "special"
          ]
        }
      }
    }]
};
function getLists(obj, key) {

    var objects = [];

    for (var k in obj) {

        if (!obj.hasOwnProperty(k)) continue;
        if (k == key) {
            if (obj[key] instanceof Array) {
                return obj[key]
            }
        } else if (typeof obj[k] == 'object') {

            objects = objects.concat(getLists(obj[k], key));
        }
    }

    return objects;
}
document.getElementsByTagName('div')[0].innerHTML = JSON.stringify(getLists(input, 'Value'));
    

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