本文介绍了如何快速给出重新排序的顺序一个Ruby数组?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我有值的阵列,且其中确定的顺序数组。
如何快速重新安排给定的顺序数组?
数据= ['0','1','2','3','4','5']为了= [3,1,2,0,4,5]
我想:
数据= ['3','1','2','0','4','5']
解决方案
数据=0,1,2,3,4, 5]为了= [3,1,2,0,4,5]> order.map {| X |数据[X]}
= GT; [3,1,2,0,4,5]
如果您不能确定,如果指数是正确的,你可以这样做:
> order.map {| X | data.fetch(X)}#将抛出一个异常,如果索引越界
= GT; [3,1,2,0,4,5]
I have an array of values, and an array which determines the order.
How can I quickly re-arrange the array in the given order?
data = ['0','1','2','3','4','5']
order = [3,1,2,0,4,5]
I want:
data = ['3','1','2','0','4','5']
解决方案
data = ["0", "1", "2", "3", "4", "5"]
order = [3, 1, 2, 0, 4, 5]
> order.map{|x| data[x]}
=> ["3", "1", "2", "0", "4", "5"]
If you are not sure if the indices are correct, you can do this:
> order.map{|x| data.fetch(x)} # will raise an exception if index out of bounds
=> ["3", "1", "2", "0", "4", "5"]
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