在Ruby中按数组的元素属性排序 [英] Sorting by an array's elements properties in ruby

问题描述

我有一个从自定义类创建的对象数组.自定义类具有一些属性，我想按这些属性之一对数组进行排序?是否有一种简单的方法可以在ruby上实现，还是应该从头开始编写?

I have an array of objects which created from a custom class. The custom class have some attributes and i want to sort the array by one of these attributes? Is there an easy way to implement this on ruby, or should i code it from scratch?

示例:

class Example
  attr_accessor :id, :number

  def initialize(iid,no)
    @id = iid
    @number = no
  end
end

exarray = []
1000.times do |n|
  exarray[n] = Example.new(n,n+5)
end

在这里，我想按其元素number属性对exarray进行排序.

Here i want to sort the exarray by its elements number attribute.

推荐答案

sort_by 可能是最短的选项

exarray.sort_by {|x| x.number}

这也可以

exarray.sort_by &:number

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