js 数组的处理？

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站长
· 阅读数 15
    let arr = [
      { areaId: 43, areaLevel: 0, areaName: "湖南" },
      { areaId: 4301, areaLevel: 1, areaName: '长沙' },
      { areaId: 430102, areaLevel: 2, areaName: '芙蓉' },
      { areaId: 430103, areaLevel: 2, areaName: '天心' },
      { areaId: 4303, areaLevel: 1, areaName: '湘潭' },
      { areaId: 430302, areaLevel: 2, areaName: '雨湖' },
      { areaId: 430304, areaLevel: 2, areaName: '岳塘' }
    ];

根据areaLevel 来过滤想得到

    let arr = [
      { areaId: 430102, province: "湖南", city: "长沙", area: "芙蓉" },
      { areaId: 430103, province: "湖南", city: "长沙", area: "天心" },
      { areaId: 430302, province: "湖南", city: "湘潭", area: "雨湖" },
      { areaId: 430304, province: "湖南", city: "湘潭", area: "岳塘" },
    ];

麻烦各位大佬帮忙看看

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1个回答
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test
2024-07-16
let areanames = arr.reduce((o, item) => ((o[item.areaId] = item.areaName), o), {})
arr.filter(i => i.areaLevel == 2).map(i => {
    let areaId = i.areaId
    return {
        areaId: areaId,
        province: areanames[String(areaId).slice(0, 2)] || '',
        city: areanames[String(areaId).slice(0, 4)] || '',
        area: i.areaName
    }
})
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