将值插入字典数组

Question

我有一个字典数组，其中有两个字典，就像这样..

[
{
    "sellingPrice" : "499",
    "id" : "5",
    "quantity" : "-2",
    "transaction_id" : "",
    "shipping_charges" : "",
    "payment_method" : "",
    "taxes" : "",
    "applied_coupon_code" : "",
    "discount_price" : "",
    "transaction_type" : "",
    "remaining_balance" : "",
    "grand_total" : ""
   },
   {
    "sellingPrice" : "500",
    "id" : "8",
    "quantity" : "79",
    "transaction_id" : "",
    "shipping_charges" : "",
    "payment_method" : "",
    "taxes" : "",
    "applied_coupon_code" : "",
    "discount_price" : "",
    "transaction_type" : "",
    "remaining_balance" : "",
    "grand_total" : ""

  }
]

在这里，仅前三个键具有值。 现在，如果我想在关键transaction_id添加一个值“ COD”，该如何实现..？

另外请注意，数组中词典的数量并不总是2。它可以是任意数量。 因此，当我给密钥transaction_id赋值“ COD”时，无论字典的数量是多少，都应该更新所有字典中的更改。

编辑直到现在我还是尝试过类似的方法。

dictionary["transaction_id"] = "CASH"
arrayOfDictionary.append(dictionary)

但是，这又添加了一个字典，其transaction_id的值为“ CASH”，总共提供2个字典，而不是2个。

Answer 1

您可以遍历数组并更改每个字典的transaction_id 。

arrayOfDictionary.indices.forEach({ arrayOfDictionary[$0]["transaction_id"] = "COD" })

如果要进行多个更新，则只需在forEach循环中执行此操作。 它将分别更改或添加值。

arrayOfDictionary.indices.forEach({
    arrayOfDictionary[$0]["transaction_id"] = "COD"
    arrayOfDictionary[$0]["anotherKey"] = "anotherValue"
})

另外，请注意，您有一个闭包数组而不是一个字典数组。 您必须将花括号{ }更改为方括号[ ]

var arrayOfDictionary = [
    [
        "sellingPrice" : "499",
        "id" : "5",
        "quantity" : "-2",
        "transaction_id" : "",
        "shipping_charges" : "",
        "payment_method" : "",
        "taxes" : "",
        "applied_coupon_code" : "",
        "discount_price" : "",
        "transaction_type" : "",
        "remaining_balance" : "",
        "grand_total" : ""
    ],
    [
        "sellingPrice" : "500",
        "id" : "8",
        "quantity" : "79",
        "transaction_id" : "",
        "shipping_charges" : "",
        "payment_method" : "",
        "taxes" : "",
        "applied_coupon_code" : "",
        "discount_price" : "",
        "transaction_type" : "",
        "remaining_balance" : "",
        "grand_total" : ""

    ]
]

Answer 2

为了简化答案，我假设词典中只有一个键。

您可以通过映射当前数组来实现它，如下所示：

var myArray = [["transaction_id": ""], ["transaction_id": ""]]

myArray = myArray.map { (dict: [String: String]) -> [String: String] in
    var copyDict = dict
    copyDict["transaction_id"] = "COD"

    return copyDict
}

print(myArray)
// [["transaction_id": "COD"], ["transaction_id": "COD"]]