我有一个值数组,一个数组决定顺序.
怎样才能按照给定的顺序重新排列阵列？
- data = ['0','1','2','3','4','5']
- order = [3,1,2,4,5]
我想要：
- data = ['3','0','5']
解决方法
- data = ["0","1","2","3","4","5"]
- order = [3,5]
- > order.map{|x| data[x]}
- => ["3","0","5"]
如果您不确定索引是否正确,您可以这样做：
- > order.map{|x| data.fetch(x)} # will raise an exception if index out of bounds
- => ["3","5"]