在Ruby on Rails中排序数组

arr = [ 
    [0, "Moving Companies", 10], 
    [0, "ab-thera-sensa", 5], 
    [0, "belt-center", 16], 
    [0, "isabel", 3], 
    [0, "kreatio", 2], 
    [0, "service1", 7], 
    [0, "sorbion-sachet-multi-star", 6], 
    [0, "sss", 15], 
    [0, "telecom-service-industry", 14], 
    [1, " AbsoPad", 13], 
    [1, "telecom-service", 8], 
    [2, "cutisorb-ultra", 12], 
    [2, "sorbion-contact", 11], 
    [2, "sorbion-sachet-multi-star", 9] 
]

假设这是我的数组，现在我想按照第一个元素的降序对它进行排序。我可以做一个arr.sort.reverse但现在的问题开始在Ruby on Rails中排序数组

我得到的数组：

[ 
    [2, "sorbion-sachet-multi-star", 9], 
    [2, "sorbion-contact", 11], 
    [2, "cutisorb-ultra", 12], 
    [1, "telecom-service", 8], 
    [1, " AbsoPad", 13], 
    [0, "telecom-service-industry", 14], 
    [0, "sss", 15], [0, "sorbion-sachet-multi-star", 6], 
    [0, "service1", 7], 
    [0, "kreatio", 2], 
    [0, "isabel", 3], 
    [0, "belt-center", 16], 
    [0, "ab-thera-sensa", 5], 
    [0, "Moving Companies", 10] 
]

现在数组应该按升序排列的第二个元素的基础上进行排序。

这怎么能实现？

结果应该是这样的：

[ 
    [2, "cutisorb-ultra", 12], 
    [2, "sorbion-contact", 11], 
    [2, "sorbion-sachet-multi-star", 9], 
    [1,.......] 
]

来源

2014-03-12 aelor

自定义与块的排序。首先按第一个元素（0）进行降序排序。如果它们相同，则按第二个元素（1）升序排列：

arr.sort! do |a, b| 
    result = b[0] <=> a[0] 
    result = a[1] <=> b[1] if result == 0 
    result 
end

来源

2014-03-12 14:18:25

你是正确的+1。这个编辑对我来说很重要，因为OP在寻找什么。 –

谢谢，你能解释一下你在那里做了什么。 – aelor

这样怎么样？

arr.sort { |i,j| [j[0],j[2]] <=> [i[0],i[2]] }

输出：

=> [[2, "cutisorb-ultra", 12], 
[2, "sorbion-contact", 11], 
[2, "sorbion-sachet-multi-star", 9], 
[1, " AbsoPad", 13], 
[1, "telecom-service", 8], 
[0, "belt-center", 16], 
[0, "sss", 15], 
[0, "telecom-service-industry", 14], 
[0, "Moving Companies", 10], 
[0, "service1", 7], 
[0, "sorbion-sachet-multi-star", 6], 
[0, "ab-thera-sensa", 5], 
[0, "isabel", 3], 
[0, "kreatio", 2]]

来源

2014-03-12 14:42:52 Abdo

谁告诉坏.. meee ??? +1 :-) –

-1

请尝试：

arr.sort_by{|x|[-x[0],-x[2]]}

来源

2014-06-04 07:13:33 bluexuemei

你能解释它为什么以及它是如何工作的吗？ – Pietu1998

你能解释一下吗？ – aelor

在Ruby on Rails中排序数组

回答

相关问题