附加具有唯一值的collect数组

Question

所以我有一个由collect构建的数组.

@a = Relation.where(part: "v04")

@relations = @a.collect {|x| x.car}

构建..

=> ["f0​​3","f04"]

@a = Relation.where(part: "v03")

@relations = @a.collect {|x| x.car}

构建..

=> ["f0​​1","f03"]

我想要的是附加收集,以便我可以从v03和v04构建一个数组,使它看起来像这样.

=> ["f0​​3","f04","f01","f03"]

然后只保留唯一值,使其看起来像这样.

=> ["f0​​3","f04","f01"]

因为它被列出两次而取出f03.

Answer 1

["f03", "f04"] | ["f01", "f03"] #=> ["f03", "f04", "f01"]

car1 = ["f03", "f04"]
car2 = ["f01", "f03"]

car1 | car2 #=> ["f03", "f04", "f01"]