ruby - Rails 3 - 从数组 A 中删除属于数组 B 的项目

Question

我开始玩数组，但我被一些看起来还非常简单的东西困住了...
我正在尝试从另一个数组中删除属于一个数组的 x 个元素。
我看过这个但是....被阻止了: Deleting items from an array requires multiple passes to remove them all

a = ["1","2","3","4","5","6"]
b = ["1","3"]
c = a.reject { |i| i =~ /b/ }

嗯，我这里有点多，谢谢!

Answer 1

a = ["1","2","3","4","5","6"]
b = ["1","3"]
c = a - b

和

一样

c = a.reject{ |e| b.include? e }