相关疑难解决方法(0)

我想将4个对象数组合并为一个数组

例如: 4个数组

var arr1 =[
  { memberID : "81fs", RatingCW:4.5},
  { memberID : "80fs", RatingCW:4},
  { memberID : "82fs", RatingCW:5 },
  { memberID : "83fs", RatingCW:3},
  { memberID : "84fs", RatingCW:4.7}
];
var arr2 =[
  { memberID : "80fs", ratingWW: 4},
  { memberID : "81fs", ratingWW: 4.5},
  { memberID : "83fs", ratingWW: 3},
  { memberID : "82fs", ratingWW: 5},
  { memberID : "84fs", ratingWW: 3.5}
];

var arr3 =  [
  { memberID : "80fs", incoCW:4},
  { memberID : "81fs", …

我想将这些数组合并为具有唯一值的单个数组。不想重复的值。

0:Array(2) ["General Fitness", "Health & Fitness"]
1:Array(2) ["Cardiovascular", "Meditation"]
2:Array(3) ["Health & Fitness", "Cardiovascular", "General Fitness"]
3:Array(1) ["Cardiovascular"]

我期望这个答案：

["General Fitness", "Health & Fitness", "Cardiovascular", "Meditation"]