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"]