如何比較兩個 arrays 並刪除、更新數組元素

Question

我有兩個 arrays 之類的對象

a = [
            {chargeType: "Accounting Charges", ct: 6, st: 6, it: 12},
            {chargeType: "Commission", ct: 6, st: 6, it: 12},
            {chargeType: "Processing Charges", ct: 6, st: 6, it: 12},
            {chargeType: "Verification Charges", ct: 6, st: 6, it: 12},
            {chargeType: "Application Fees", ct: 6, st: 6, it: 12},
            {chargeType: "Legal Charges", ct: 6, st: 6, it: 12},
            {chargeType: "Bank Charges", ct: 6, st: 6, it: 12},
]

和

b = [
                {chargeType: "Accounting Charges", ct: 6, st: 6, it: 12},
                {chargeType: "Commission", ct: 6, st: 6, it: 12},
                {chargeType: "Processing Charges", ct: 7, st: 7, it: 14},
                {chargeType: "Verification Charges", ct: 6, st: 6, it: 12},
                {chargeType: "Application Fees", ct: 6, st: 6, it: 12},
                {chargeType: "Legal Charges", ct: 6, st: 6, it: 12},
]

1.現在通過比較 arrays 如果數組 b 中缺少任何費用，則在數組 a 中添加 boolean 屬性。 就像數組 A 中的銀行費用記錄在那里一樣，但數組 B 中缺少它。所以，我必須在數組 A 中向該銀行費用 object 添加一個屬性。

2. 在數組 B 中，如果任何記錄被更新，這些值應該被復制到數組 A 中。就像在數組 B 中處理費用記錄 ct,st 並且它的值被更新並且這些值應該在數組 A 中更新。

任何人都可以幫助如何實現這一目標

Answer 1

根據所問

1.現在通過比較 arrays 如果數組 b 中缺少任何費用，則在數組 a 中添加 boolean 屬性。 就像在數組 A 銀行費用記錄中一樣，但它在數組 B 中丟失。所以，我必須在數組 A 中向該銀行費用 object 添加一個屬性。在數組 B 中，如果更新了任何記錄，這些值應復制到數組 A 中. 就像在數組 B 中處理費用記錄 ct,st 並且它的值被更新並且這些值應該在數組 A 中更新。

這可以通過一行來完成：

Object.assign(x,y) // x <-- what was in x, updated with what was in y

我正在更改a中的一個值，以表明它已使用來自b的內容進行了更新

 a = [ {chargeType: "Accounting Charges", ct: 111111111111, st: 6, it: 12}, {chargeType: "Commission", ct: 6, st: 6, it: 12}, {chargeType: "Processing Charges", ct: 6, st: 6, it: 12}, {chargeType: "Verification Charges", ct: 6, st: 6, it: 12}, {chargeType: "Application Fees", ct: 6, st: 6, it: 12}, {chargeType: "Legal Charges", ct: 6, st: 6, it: 12}, {chargeType: "Bank Charges", ct: 6, st: 6, it: 12}, ] b = [ {chargeType: "Accounting Charges", ct: 6, st: 6, it: 12}, {chargeType: "Commission", ct: 6, st: 6, it: 12}, {chargeType: "Processing Charges", ct: 7, st: 7, it: 14}, {chargeType: "Verification Charges", ct: 6, st: 6, it: 12}, {chargeType: "Application Fees", ct: 6, st: 6, it: 12}, {chargeType: "Legal Charges", ct: 6, st: 6, it: 12}, ] Object.assign(a,b) console.log(a)

如果您想a原樣並創建一個新的 object：

c = Object.assign({},a,b);