Question

我有以下文本文件。

bob jones,19,moore reef,yes,no
jenny smith, 21,reef park,yes,yes
any body, 12,somewhere,no,no

我希望每一行都在一个单独的数组中，或者我希望每个数据片段都有单独的数组（例如.name_array，age_array，destination_array等）。

我该怎么做？

Answer 1

使用标准库中的CSV解析器加载它：

require 'csv'
a = CSV.open('x.csv').map { |r| r.map(&:strip) }

会给你一个a这样的：

[
    [ "bob jones",   "19", "moore reef", "yes", "no"  ],
    [ "jenny smith", "21", "reef park",  "yes", "yes" ],
    [ "any body",    "12", "somewhere",  "no",  "no"  ]
]

然后，您可以使用b = a.transpose翻转行和列，以便在b中获取此内容：

[
    [ "bob jones", "jenny smith", "any body" ],
    [ "19", "21", "12" ],
    [ "moore reef", "reef park", "somewhere" ],
    [ "yes", "yes", "no" ],
    [ "no", "yes", "no" ]
]

然后从那里你可以根据需要拉出各个数组：

names, ages, destinations, flags1, flags2 = *b

我不得不猜测flags1和flags2名称。

Answer 2

将文件拆分为readlines行，然后每行使用逗号String#split。然后，如果你喜欢（为你的“第二种方式”）转置。

给定文件people.txt

bob jones,19,moore reef,yes,no
jenny smith, 21,reef park,yes,yes
any body, 12,somewhere,no,no

然后这样的文件行被删除：

people = IO.readlines("people.txt")
p people

这给出了

["bob jones,19,moore reef,yes,no\n", 
 "jenny smith, 21,reef park,yes,yes\n", 
 "any body, 12,somewhere,no,no"]

此时你还有一些额外的换行符，但是当你逐行处理时，它们会消失，添加String#chomp：

result = []
people = IO.readlines("people.txt")
people.each {|line| result << line.chomp.split(",")}
p result

这给出了

[["bob jones", "19", "moore reef", "yes", "no"], 
 ["jenny smith", " 21", "reef park", "yes", "yes"], 
 ["any body", " 12", "somewhere", "no", "no"]]

问题的第二部分是如何为每列获取切片。最简单的方法是使用transpose。像这样：

result = []
people = IO.readlines("people.txt")
people.each {|line| result << line.chomp.split(",")}
p result.transpose

这给出了

[["bob jones", "jenny smith", "any body"], 
 ["19", " 21", " 12"], 
 ["moore reef", "reef park", "somewhere"], 
 ["yes", "yes", "no"], 
 ["no", "yes", "no"]]

更新我必须编辑我的答案才能加入chomps！另外，您也可以添加一些字符串修剪。我会让你看那个。： - ）

Answer 3

我这样做了;

f1 = File.open(filename,"r")                
f1.each do | line|
  i += 1 
  data = line.split(',')
  #store data into arrays
  passenger_name[i] = data[0] #passenger's name
  passenger_age[i] = data[1]
  passenger_destination[i] = data[2]
  passenger_meal[i] = data[3]
  passenger_dive[i] = data[4]
  end

它将每个名称，年龄，目的地等存储在不同的数组中，从而更好地解决了我的问题。感谢您的所有回复。

在Ruby中拆分文本文件两次

3 个答案: