我正在经历Learn Ruby The Hard Way，我一直在清理代码。当我运行 ori 代码时，它不会产生任何错误。当我使用更改运行我的代码时，它会运行所有内容，但还会添加一条错误消息。我不太清楚为什么。请帮忙。
ex17.rb:19:in `<main>': undefined method `close' for #<String:0x007febe4054c18> (NoMethodError)
原产地
from_file, to_file = ARGV
script = $0
puts "Copying from #{from_file} to #{to_file}"
#we could do these two on one line too, how?
input = File.open(from_file)
indata = input.read()
puts "The input file is #{indata.length} bytes long"
puts "Does the output file exist? #{File.exist? to_file}"
output = File.open(to_file, "w")
output.write(indata)
puts "Alright, all done."
output.close()
input.close()
我所做的更改是将输入和数据放在一起。
from_file, to_file = ARGV
script = $0
puts "Copying from #{from_file} to #{to_file}"
#we could do these two on one line too, how?
input = File.open(from_file).read()
puts "The input file is #{input.length} bytes long"
puts "Does the output file exist? #{File.exist? to_file}"
output = File.open(to_file, "w")
output.write(input)
puts "Alright, all done."
output.close()
input.close()