红宝石印刷书写线

Question

我试图截断并写入新的生产线，以一个文件的内容并打印后的空白：

target = File.open(ARGV.first, 'w') 

puts "we are going to clear the file first" 

target.truncate(0) 

puts "give me 1 line" 
line1 = $stdin.gets.chomp 
puts "give me another line!" 
line2 = $stdin.gets.chomp 

puts "we are gonna write the text into the file now" 
target.write(line1) 
target.write("\n") 
target.write(line2) 
target.write("\n") 

newfile = open(ARGV.first, 'r') 
puts newfile.read 

puts "we will close the file now" 
target.close 

然而，红宝石保持印刷空白。我写的文本文件有我输入的文本。我不确定发生了什么事。

Answer 1

您需要先关闭文件，然后再尝试读取文件。

target = File.open(ARGV.first, 'w') 

puts "we are going to clear the file first" 

target.truncate(0) 

puts "give me 1 line" 
line1 = $stdin.gets.chomp 
puts "give me another line!" 
line2 = $stdin.gets.chomp 

puts "we are gonna write the text into the file now" 
target.write(line1) 
target.write("\n") 
target.write(line2) 
target.write("\n") 

puts "we will close the file now" 
target.close 

newfile = open(ARGV.first, 'r') 
puts newfile.read