将数组与唯一键映射在一起

Question

我正在尝试将两个数组映射在一起，然后为该新数组中的值创建唯一键。我正在处理多个不同的数组。

我的数组是这样的

var arr = 
[
    {
    "title": "title 1"
      "projects": [
        "project1",
        "project2",
        "project3",
        "project4",
        "project5",
        "project6"
      ],
      "project_links": [
        "link1",
        "link2",
        "link3",
        "link4",
        "link5",
        "link6"
      ]
    },
   {
    "title": "title 2"
      "projects": [
        "project1",
        "project2",
        "project3"
      ],
      "project_links": [
        "link1",
        "link2",
        "link3"
      ]
    },
   {
    "title": "title 3"
      "projects": [
        "project1",
        "project2",
        "project3",
        "project4",
        "project5"
      ],
      "project_links": [
        "link1",
        "link2",
        "link3",
        "link4",
        "link5"
      ]
    },
   {
    "title": "title 4"
      "projects": [
        "project1",
        "project2",
        "project3",
        "project4",
        "project5"
      ],
      "project_links": [
        "link1",
        "link2",
        "link3",
        "link4",
        "link5"
      ]
    },
    {
    "title": "title 5"
      "projects": [
        "project1"
      ],
      "project_links": [
        "link1"
      ]
    }
  ]

这是我尝试过的

for (let i = 0; i < arr.length; i++) {
    var test = arr[i].projects.map((x, y) => [x, arr[i].project_links[y]])
    for (let n = 0; n < test.length; n++) {
        arr[i].custom = {};
        arr[i].custom["projects"] = [];
        arr[i].custom["projects"].push({
            name: test[n][0],
            link: test[n][1]
        });
    }
}

我希望我的最终结果看起来像这样

var arr = 
[
  {
    "title": "title 1"
    "custom": {
      "projects": [
        {
          "project_name": "project1",
          "link": "link1"
        },
        {
          "project_name": "project2",
          "link": "link2"
        },
        {
          "project_name": "project3",
          "link": "link3"
        },
        {
          "project_name": "project4",
          "link": "link5"
        },
        {
          "project_name": "project5",
          "link": "link5"
        },
        {
          "project_name": "project6",
          "link": "link6"
        }
      ]
    }
  },
  {
    "title": "title 2"
    "custom": {
      "projects": [
        {
          "project_name": "project1",
          "link": "link1"
        },
        {
          "project_name": "project2",
          "link": "link2"
        },
        {
          "project_name": "project3",
          "link": "link3"
        }
      ]
    }
  },
  {
    "title": "title 3"
    "custom": {
      "projects": [
        {
          "project_name": "project1",
          "link": "link1"
        },
        {
          "project_name": "project2",
          "link": "link2"
        },
        {
          "project_name": "project3",
          "link": "link3"
        },
        {
          "project_name": "project4",
          "link": "link4"
        },
        {
          "project_name": "project5",
          "link": "link5"
        }
      ]
    }
  },
 ...etc
]

我能够将数组映射在一起并为值创建唯一的键名，但是我不知道如何将这些数组包含在正确的对象中。我希望能够将它推入原始 arr 而不是创建一个全新的数组。我可以稍后删除数组中不需要的部分。提前致谢。

Answer 1

使用Array#map，遍历数组。

在每次迭代中，要获得custom.projects，再次使用Array#map，遍历当前项目数组并使用第二个parameter（索引）获取相应的链接：

const arr = [
  {
    title: "title 1",
    projects: [ "project1", "project2", "project3", "project4", "project5", "project6" ],
    project_links: ["link1", "link2", "link3", "link4", "link5", "link6"]
  },
  {
    title: "title 2",
    projects: ["project1", "project2", "project3"],
    project_links: ["link1", "link2", "link3"]
  },
  {
    title: "title 3",
    projects: ["project1", "project2", "project3", "project4", "project5"],
    project_links: ["link1", "link2", "link3", "link4", "link5"]
  },
  {
    title: "title 4",
    projects: ["project1", "project2", "project3", "project4", "project5"],
    project_links: ["link1", "link2", "link3", "link4", "link5"]
  },
  {
    title: "title 5",
    projects: ["project1"],
    project_links: ["link1"]
  }
];

const res = arr.map(({ title, projects = [], project_links = [] }) => ({
  title,
  custom: {
    projects: projects.map((project_name, i) => ({ project_name, link: project_links[i] }))
  }
}));

console.log(res);