按递减或递增顺序按数字字段对数组 Angular 7 进行排序

Question

我需要帮助，我需要按 PendingQuantity 字段对数组进行排序。我有负数和正数。所以我的代码：

this.data.Products.sort(obj => obj.PendingQuantity);

所以我的数组

"Products": [
            {
                "ProductCode": "MC30180",
                "Description": "Description_1",
                "NationalCode": "N.C. 0965",
                "PendingQuantity": 20,
                "toBeScanned": true
            },
            {
                "ProductCode": "Name_2",
                "Description": "Description_2",
                "NationalCode": "N.C. 0382",
                "PendingQuantity": -3,
                "toBeScanned": false
            },
            {
                "ProductCode": "Name_3",
                "Description": "Description_3",
                "NationalCode": "N.C. 8913",
                "PendingQuantity": 25,
                "toBeScanned": false
            }
        ]

我想要的顺序是：

"Products": [
                {
                    "ProductCode": "MC30180",
                    "Description": "Description_1",
                    "NationalCode": "N.C. 0965",
                    "PendingQuantity": -3,
                    "toBeScanned": true
                },
                {
                    "ProductCode": "Name_2",
                    "Description": "Description_2",
                    "NationalCode": "N.C. 0382",
                    "PendingQuantity": 25,
                    "toBeScanned": false
                },
                {
                    "ProductCode": "Name_3",
                    "Description": "Description_3",
                    "NationalCode": "N.C. 8913",
                    "PendingQuantity": 20,
                    "toBeScanned": false
                }
            ]

Answer 1

您可以将其用于订单 asc product = product.sort((a, b) => a.PendingQuantity - b.PendingQuantity);

如果您想按 desc 订购，请使用 product = product.sort((a, b) => b.PendingQuantity - a.PendingQuantity);

更新：

如果您显示自定义顺序，如 -3、25、20，则可以处理排序条件。

product = product.sort((a, b) => { if (a.PendingQuantity < 0) {return -1; } if (b.PendingQuantity <0 ) {return 1;} return b.PendingQuantity - a.PendingQuantity });

product = product.sort((a, b) => { if (a.PendingQuantity < 0) {return -1; } if (b.PendingQuantity <0 ) {return 1;} return b.PendingQuantity - a.PendingQuantity });