尝试比较两个文本文件,并根据信息创建第三个文件 [英] Trying to compare two text files, and create a third based on information
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问题描述
我有两个文本文件,master.txt和926.txt.如果926.txt中的某行不在master.txt中,则我要写入一个新文件notinbook.txt.
I have two text files, master.txt and 926.txt. If there is a line in 926.txt that is not in master.txt, I want to write to a new file, notinbook.txt.
我写了我能想到的最好的东西,但是考虑到我是一个糟糕的/新手程序员,它失败了.这就是我所拥有的
I wrote the best thing I could think of, but given that I'm a terrible/newbie programmer it failed. Here's what I have
g = File.new("notinbook.txt", "w")
File.open("926.txt", "r") do |f|
while (line = f.gets)
x = line.chomp
if
File.open("master.txt","w") do |h|
end
while (line = h.gets)
if line.chomp != x
puts line
end
end
end
end
end
g.close
当然,它会失败.谢谢!
Of course, it fails. Thanks!
推荐答案
这应该有效:
f1 = IO.readlines("926.txt").map(&:chomp)
f2 = IO.readlines("master.txt").map(&:chomp)
File.open("notinbook.txt","w"){ |f| f.write((f1-f2).join("\n")) }
这是我的考验:
This was my test:
926.txt
line1
line2
line3
line4
line5
master.txt
line1
line2
line4
notinbook.txt
line3
line5
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