用条件语句过滤对象数组

Question

我有具有以下结构的JavaScript对象数组：

const果树={ "id"："1"，"title"："Banana"，"description"："1分钟“}，{ "id"："2"，“标题”：“苹果”，“描述”：“2-3天”}，{ "id"："3"，“标题”："Manggo"，“描述”：“10-20天”}，{ "id"："4"，“标题”：“橙”，“描述”：“10-20天”}，{ "id"："5"，“标题”：“葡萄蓝”，“描述”：“10-20天”}，{ "id"："6"，“标题”：“葡萄红”，“描述”：“10-20天”}

我想提取具有description =“10-20天”和title 不包含“葡萄”的对象。

那么我的期望应该是

{ "id": "3", "title": "Manggo", "description": "10 - 20 Days" }, { "id": "4", "title": "Orange", "description": "10 - 20 Days" }

Answer 1

通过使用Array.protoype.filter很容易做到这一点。在filter回调中，可以使用String.protoype.includes方法检查标题是否包括"grapes"。

​

const fruits = [{
    "id": "1",
    "title": "Banana",
    "description": "1 Minute"
  },
  {
    "id": "2",
    "title": "Apple",
    "description": "2 - 3 Days"
  },
  {
    "id": "3",
    "title": "Manggo",
    "description": "10 - 20 Days"
  },
  {
    "id": "4",
    "title": "Orange",
    "description": "10 - 20 Days"
  },
  {
    "id": "5",
    "title": "Grape blue",
    "description": "10 - 20 Days"
  },
  {
    "id": "6",
    "title": "Grape red",
    "description": "10 - 20 Days"
  }
];

const filteredFruits = fruits.filter(fruit => {
  if (!fruit.title.toLowerCase().includes("grape")) {
    if (fruit.description === "10 - 20 Days") {
      return true;
    }
  }

  return false;
});

console.dir(filteredFruits)

​

Answer 2

你应该像这样使用过滤器

const fruits =       [{
                        "id": "1",
                        "title": "Banana",
                        "description": "1 Minute"
                    },
                    {
                        "id": "2",
                        "title": "Apple",
                        "description": "2 - 3 Days"
                    },
                    {
                        "id": "3",
                        "title": "Manggo",
                        "description": "10 - 20 Days"
                    },
                    {
                        "id": "4",
                        "title": "Orange",
                        "description": "10 - 20 Days"
                    },
                    {
                        "id": "5",
                        "title": "Grape blue",
                        "description": "10 - 20 Days"
                    },
                    {
                        "id": "6",
                        "title": "Grape red",
                        "description": "10 - 20 Days"
                    }]

const res = fruits.filter(val=> !val.title.includes('Grape') && val.description.includes('10 - 20 Days'))

console.log(res)