在 Ruby 中读取文件的所有常见方法是什么? [英] What are all the common ways to read a file in Ruby?

问题描述

在 Ruby 中读取文件的所有常用方法是什么?

What are all the common ways to read a file in Ruby?

例如，这是一种方法:

fileObj = File.new($fileName, "r")
while (line = fileObj.gets)
  puts(line)
end
fileObj.close

我知道 Ruby 非常灵活.每种方法的优点/缺点是什么?

I know Ruby is extremely flexible. What are the benefits/drawbacks of each approach?

推荐答案

File.open("my/file/path", "r") do |f|
  f.each_line do |line|
    puts line
  end
end
# File is closed automatically at end of block

也可以在如上之后显式关闭文件(将块传递给 open 为您关闭它):

It is also possible to explicitly close file after as above (pass a block to open closes it for you):

f = File.open("my/file/path", "r")
f.each_line do |line|
  puts line
end
f.close

这篇关于在 Ruby 中读取文件的所有常见方法是什么?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IT屋！