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Merge two arrays containing objects and remove duplicate values（7个答案）
9小时前关门了。
我想把两个数据库中的数组合并成一个而不覆盖数据，我尝试了不同的选项，如lodash合并，连接等，但没有运气。你能帮帮忙吗？
我的对象：

places: [
    { placeId: 2, place: 'a' },
    { placeId: 3, place: 'b' },
    { placeId: 4, place: 'c' },
    { placeId: 5, place: 'd' },
    { placeId: 6, place: 'e' }
  ]

places: [
    { placeId: 12, place: 'f' },
    { placeId: 13, place: 'g' },
    { placeId: 14, place: 'h' },
    { placeId: 21, place: 'i' },
    { placeId: 22, place: 'j' },
    { placeId: 29, place: 'k' },
    { placeId: 30, place: 'l' }
  ]

我想要这个

places:[
    { placeId: 2, place: 'a' },
    { placeId: 3, place: 'b' },
    { placeId: 4, place: 'c' },
    { placeId: 5, place: 'd' },
    { placeId: 6, place: 'e' },
    { placeId: 12, place: 'f' },
    { placeId: 13, place: 'g' },
    { placeId: 14, place: 'h' },
    { placeId: 21, place: 'i' },
    { placeId: 22, place: 'j' },
    { placeId: 29, place: 'k' },
    { placeId: 30, place: 'l' }

]