Ruby：将对象添加到数组末尾
我有两个对象@tracks（可枚举）和@artist，我想创建一个包含所有曲目和其中艺术家的可枚举对象。这样我就可以将它们传递给一个可以执行的方法（每个曲目和艺术家都有更改事件）：
change_events = object.map(&:change_events).flatten
我的想法是：
objects = @artist.tracks
objects << @artist
但这给了我第二行的错误（这是有道理的，但我不知道如何解决）：
Track(#17816) expected, got Artist(#17572)
任何关于我如何做到这一点的想法将不胜感激！
I have two objects @tracks (an enumerable) and @artist, and I'd like to create an enumerable with all the tracks and the artist in them. This is so that I can pass them to a method which will do (each track, and the artist have change events):
change_events = object.map(&:change_events).flatten
My idea was:
objects = @artist.tracks
objects << @artist
but that gives me this error for the second line (which makes sense, but I don't know how to fix):
Track(#17816) expected, got Artist(#17572)
Any ideas on how I could do this would be appreciated!
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这个（错误）表明它（
@artist.tracks的返回值）不是您正在处理的数组，而是一些特定于rails的数据类型。您可以尝试但是在数组中使用非齐次值通常不好，如果它们都响应您需要的方法，那么您应该会很好。
This (the error) signals that it (the return value of
@artist.tracks) is not an array you are dealing with, but some rails-specific data type. You could tryBut using inhomogeneous values in an array is often not good, if they all respond to the method you need you should be good though.