从一个数组的数组这是空的空白删除所有项目 [英] Removing all items from an array of arrays which are empty of blank

问题描述

我有一个数组的数组，我想删除所有具有这是剥离后的空间为零或空元素的项目。看看这个片断：

I have an array of arrays and I would like to remove all the items that have elements which are nil or empty after stripping spaces. Look at this snippet:

x = Array.new
x << ["A","B", " ", "D"]
x << ["","  ", nil, ""]
x << ["E","Q", "F", "M"]

我想删除第二个记录，因为它不包含真实的数据。

I would like to remove the second record because, it contains no real data.

什么是做到这一点的最好方法是什么？我应该简单地迭代这个数组和写的if-else条件测试？

What would be the best way to do this? Should I simply iterate over the array and and write if-else conditions to test?

推荐答案

如果使用纯Ruby中，你可以做

If using plain Ruby, you can do

x.reject{ |arr| arr.all? {|elem| elem.nil? || elem.strip.empty? }}

如果使用Rails，由于辅助方法，你可以做

If using rails, thanks to the helper methods you can do

x.reject{ |arr| arr.all?(&:blank?) }

关键方法是 拒绝 和 空白？

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