将正则表达式结果写入新文件

Question

我有一个设备列表：

• IPC-bei640-R-BR-01
• IPC-bei640-R-BR-02
• IPC-bei640-R-BR-03
• IPC-bei640-R-BR-04
• IPC-bei640-R-BR-05
• IPC-bem640-R-BR-01
• IPC-bem640-R-BR-02
• IPC-bem640-R-BR-03
• IPC-crg660-R-BR-02
• IPC-geb680-R-BR-04
• IPC-lgv630-R-BR-01

这个小小的ruby脚本计算文件行braslist.txt用正则表达式扫描它并将结果写入名为“strippedfile.txt”的新文件

lines = IO.readlines("/usr/local/bin/braslist.txt")

# Linecount is forwarded to StdOut.
puts lines.length

str = File.read('braslist.txt')

file_name = ['strippedfile.txt']

file_name.each do |file_name|
  text = File.read(file_name)
  new_contents = str.scan(/^ipc-(?<bng>[a-z]{3}\d{3})-r-br(?<nr>-\d{2})$/)

# open and write to a file with ruby
open('strippedfile.txt', 'w') { |f|
  f.print new_contents
}

end

现在我似乎无法修复，在新文件“strippedfile”中，结果总是[“bei640”，“ - 01”] [“bei640”，“ - 02”] [“bei640”，“ - 03" ]

我正试图以这种格式获得所有结果：

• bei640-01
• bei640-02
• bei640-03
• bei640-04

Answer 1

scan会返回一系列匹配项，您可能需要join它们：

- new_contents = str.scan(/^ipc-(?<bng>[a-z]{3}\d{3})-r-br(?<nr>-\d{2})$/)
+ new_contents = str.scan(/^ipc-(?<bng>[a-z]{3}\d{3})-r-br(?<nr>-\d{2})$/).map(&:join)

To print everything without quotes and brackets line by line:

- f.print new_contents
+ f.puts new_contents

Answer 2

假设您的结果数组是

a = [["bei640", "-02"], ["bei640", "-03"]]

您可以使用join来获得所需的结果

a.map{|i| i.join } #=> ["bei640-02", "bei640-03"]

或使用快捷方式mudasobwa已解答

a.map(&:join) #=> ["bei640-02", "bei640-03"]