二维数组中的重复项

本文介绍了二维数组中的重复项的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我正在做一个简单的彩票游戏.目前它从一个txt文件中取出序列号和彩票号码，并将它们放在一个二维数组中.

I i'm doing a simple lottery game. at the moment its taking serial number and lottery number from a txt file, and putting them in a 2 dimensional array.

现在我想检查一下序列号和彩票号码是否重复

now i want to make a check grade if there are any duplicates of the serial number and lottery number

example:
5153,177 = 1
54338,115 = 1
74522,171 = 3

我尝试过使用支票号码方法，它没有给出任何错误，但是当我这样做时

i've tried making a check number method, it do not give any errors, but when i do

puts sold.checkgrade

它不起作用

我怎样才能让它像我的例子一样?

How can i make it do like in my example?

class Lottery

    attr_accessor :lotnumber
    attr_accessor :serialnumber


    def initialize(lotnumber, serialnumber)
       @lotnumber = lotnumber
       @serialnumber = serialnumber
    end

    def checknumber
       ObjectSpace.each_object(Lottery).to_a.select do |other|
       @lotnumber == other.lotnumber && @serialnumber == other.serialnumber
       end.size
    end

end

我的txt

推荐答案

Ruby 的 group_by 方法是一个很好的起点:

Ruby's group_by method is a good place to start:

data = %w[
  29371,43
  13797,6
  8114,55
  70657,106
  32741,74
  7272,103
  37416,14
  5153,177
  54338,115
  74522,171
  74522,171
  74522,171
]

data.group_by{ |s| s }.map{ |k, v| [k, v.size] }
# => [["29371,43", 1],
#     ["13797,6", 1],
#     ["8114,55", 1],
#     ["70657,106", 1],
#     ["32741,74", 1],
#     ["7272,103", 1],
#     ["37416,14", 1],
#     ["5153,177", 1],
#     ["54338,115", 1],
#     ["74522,171", 3]]

内在的魔法是，group_by 创建一个数组的散列:

The inner magic is, group_by creates a hash of arrays:

data.group_by{ |s| s }
# => {"29371,43"=>["29371,43"],
#     "13797,6"=>["13797,6"],
#     "8114,55"=>["8114,55"],
#     "70657,106"=>["70657,106"],
#     "32741,74"=>["32741,74"],
#     "7272,103"=>["7272,103"],
#     "37416,14"=>["37416,14"],
#     "5153,177"=>["5153,177"],
#     "54338,115"=>["54338,115"],
#     "74522,171"=>["74522,171", "74522,171", "74522,171"]}

如果你想要散列而不是数组数组:

If you want a hash instead of an array of arrays:

Hash[data.group_by{ |s| s }.map{ |k, v| [k, v.size] }]
# => {"29371,43"=>1,
#     "13797,6"=>1,
#     "8114,55"=>1,
#     "70657,106"=>1,
#     "32741,74"=>1,
#     "7272,103"=>1,
#     "37416,14"=>1,
#     "5153,177"=>1,
#     "54338,115"=>1,
#     "74522,171"=>3}

这篇关于二维数组中的重复项的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！

Any