如何使用Ruby读取文件？ [英] How can I read a file with Ruby?

问题描述

如果可能，请提供一些示例代码。

解决方案

 ＃！/ usr / bin / ruby​​ -w 
 
＃由Michael Williams创建12 / 19/2005 
＃在创建共享署名许可下授权
  

示例1 - 读取文件并关闭：

  counter = 1 
 file = File.new（readfile.rb，r）
 while（line = file.gets）
 puts＃{counter}：＃{line}
 counter = counter + 1 
 end 
 file.close 
  

示例2 - 传递文件阻止：

  File.open（readfile.rb，r）do | infile | 
 while（line = infile.gets）
 puts＃{counter}：＃{line}
 counter = counter + 1 
 end 
 end 
  

示例3 - 使用异常处理读取文件：

  counter = 1 
 begin 
 file = File.new（readfile.rb，r）
 while（line = file.gets）
 put＃{counter}：＃{line}
 counter = counter + 1 
 end 
 file.close 
 rescue => err 
 putsException：＃{err}
 err 
 end 
  

How can I read a file, possibly using a loop, in Ruby?

Please provide some sample code if possible.

解决方案

#!/usr/bin/ruby -w

# Created by Michael Williams 12/19/2005
# Licensed under Create Commons Attribution License

Example 1 - Read File and close:

counter = 1
file = File.new("readfile.rb", "r")
while (line = file.gets)
    puts "#{counter}: #{line}"
    counter = counter + 1
end
file.close

Example 2 - Pass file to block:

File.open("readfile.rb", "r") do |infile|
    while (line = infile.gets)
        puts "#{counter}: #{line}"
        counter = counter + 1
    end
end

Example 3 - Read File with Exception Handling:

counter = 1
begin
    file = File.new("readfile.rb", "r")
    while (line = file.gets)
        puts "#{counter}: #{line}"
        counter = counter + 1
    end
    file.close
rescue => err
    puts "Exception: #{err}"
    err
end

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