試圖比較兩個文本文件，並根據信息創建第三個

Question

我有兩個文本文件，master.txt和926.txt。如果926.txt中有一行不在master.txt中，那麼我想寫入一個新文件notin.txt。

我寫了我能想到的最好的東西，但鑑於我是一個可怕的/新手程序員失敗了。下面是我有

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 

當然，它失敗。謝謝！

Answer 1

用途：http://raa.ruby-lang.org/project/compare/

OR

％×（DIFF文件1文件2）

OR

http://github.com/myobie/htmldiff/

Answer 2

你可以做這樣的事情：

​​

Answer 3

這應該工作：

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")) } 

---

這是我的測試：

926.txt

line1 
line2 
line3 
line4 
line5 

master.txt

line1 
line2 
line4 

notinbook.txt

line3 
line5 

Answer 4

希望這有助於

dir = File.dirname(__FILE__) 
notinbook = "#{dir}/notinbook.txt" 
master = "#{dir}/master.txt" 
f926  = "#{dir}/926.txt" 

def file_into_ary(file) 
    ary = [] 
    File.open(file).each{ |line| ary << line } 
    return ary 
end 

def write_difference(file, diff) 
    File.open(file, 'w') do |file| 
    diff.each do |line| 
     file.write(line) 
    end 
    end 
end 

diff = file_into_ary(f926) - file_into_ary(master) 
write_difference(notinbook, diff) unless diff.empty?