[英]How to sort the array in ruby
I have a following array 我有以下数组
arr = ["2014-05-02T19-49-55_1280x720_vga2usb.mp4", "2014-05-02T19-49-55_544x288_left_cam.mp4", "2014-05-02T19-49-55_544x288_right_cam.mp4", "2014-05-02T19-49-55_1632x288.mp4"]
I need to sort this array in a way that I get following: 我需要按照以下方式对该数组进行排序:
["2014-05-02T19-49-55_1632x288.mp4", "2014-05-02T19-49-55_544x288_left_cam.mp4", "2014-05-02T19-49-55_544x288_right_cam.mp4", "2014-05-02T19-49-55_1280x720_vga2usb.mp4"]
I tried to use the sort method arr.sort
and arr.sort_by{|word| word.downcase}
我试图使用排序方法
arr.sort
和arr.sort_by{|word| word.downcase}
arr.sort_by{|word| word.downcase}
But it is giving me output as arr.sort_by{|word| word.downcase}
但这给了我输出
["2014-05-02T19-49-55_1280x720_vga2usb.mp4", "2014-05-02T19-49-55_1632x288.mp4", "2014-05-02T19-49-55_544x288_left_cam.mp4", "2014-05-02T19-49-55_544x288_right_cam.mp4"]
How can I do this? 我怎样才能做到这一点?
Try to use sort like this: 尝试使用像这样的排序:
arr.sort { |x,y| y <=> x }
If you need to sort by substring try something like this: 如果您需要按子字符串排序,请尝试以下操作:
arr.sort { |x,y| y[m,n] <=> x[m,n]}
EDIT: this should work: 编辑:这应该工作:
arr.sort do |x,y|
regex = /x[[:digit:]]+(.+?)$/
regex.match(x)[1] <=> regex.match(y)[1]
end
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