试图预先使用红宝石

Question

我想将文本预先添加到现有文件中。此代码工作得很好，但最后一行似乎从未执行。我可以删除原始文件，但该文件从来没有在新的临时文件回原来的文件名重命名......

我敢肯定它的东西很容易，但是，我不知道为什么它不工作。谁能帮忙？

# grab input text 
s = "{query}" 

# create insert value in template with timestamp 
tmp = "#{Time.now.strftime('%Y-%m-%d %I:%M %p')}\n#{s}" 

# path to file you wish to append... 
# folder path must exist, file will be created if it doesn't 
o = File.expand_path("~/Dropbox/Notes/1scratchpad.txt") 
n = File.expand_path("~/Dropbox/Notes/1scratchpad.new.txt") 

# open file in append mode and add the string 
File.open(n, 'w') do |n| 
    n.puts tmp 
    n.puts "\n" 
    File.foreach(o) do |li| 
     n.puts li 
    end 
end 

File.delete(o) 
File.rename(n, o) 

Answer 1

试试这个

# grab input text 
s = "{query}" 

# create insert value in template with timestamp 
tmp = "#{Time.now.strftime('%Y-%m-%d %I:%M %p')}\n#{s}" 

# path to file you wish to append... 
# folder path must exist, file will be created if it doesn't 
o = File.expand_path("~/Dropbox/Notes/1scratchpad.txt") 
n = File.expand_path("~/Dropbox/Notes/1scratchpad.new.txt") 

# open file in append mode and add the string 
File.open(n, 'a') do |n| 
    n << tmp 
    n << "\n" 
    n << File.read(o) 
end 


#File.delete(o) 
## Delete is no longer rename would take care of everthing 
File.rename(n, o)