来自另一个在Ruby中减去1阵列 [英] Subtracting one Array from another in Ruby

问题描述

我有任务的两个数组 - 创建和分配。
我想从创建的任务数组中删除所有分配任务。
这是我的工作，但凌乱，code：

I've got two arrays of Tasks - created and assigned. I want to remove all assigned tasks from the array of created tasks. Here's my working, but messy, code:

	@assigned_tasks = @user.assigned_tasks
	@created_tasks = @user.created_tasks

	#Do not show created tasks assigned to self
	@created_not_doing_tasks = Array.new
	@created_tasks.each do |task|
		unless @assigned_tasks.include?(task)
			@created_not_doing_tasks << task
		end
	end

我敢肯定有一个更好的办法。它是什么？
感谢： - ）

I'm sure there's a better way. What is it? Thanks :-)

推荐答案

您可以减去阵列在Ruby中：

You can subtract arrays in Ruby:

[1,2,3,4,5] - [1,3,4]  #=> [2,5]

查看阵列文档。

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