Ruby：如何找到最小数组元素的索引？

发布时间：2020-12-16 20:31:41 所属栏目：百科来源：网络整理

导读：有没有办法重写这个更优雅？我认为这是一个坏代码,应该被重构. a = [2,4,10,1,13]= [2,13] index_of_minimal_value_in_array = a.index(a.min)= 3 解决方法 It would be interesting to read about other situations (finding all and only last minimal ele

有没有办法重写这个更优雅？我认为这是一个坏代码,应该被重构.

>> a = [2,4,10,1,13]
=> [2,13]
>> index_of_minimal_value_in_array = a.index(a.min)
=> 3

解决方法

It would be interesting to read about other situations (finding all and only last minimal element).

ary = [1,2,1]

# find all matching elements' indexes
ary.each.with_index.find_all{ |a,i| a == ary.min }.map{ |a,b| b } # => [0,2]
ary.each.with_index.map{ |a,i| (a == ary.min) ? i : nil }.compact # => [0,2]

# find last matching element's index
ary.rindex(ary.min) # => 2

（编辑：李大同）

【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容!