試圖預先使用紅寶石

Question

我想將文本預先添加到現有文件中。此代碼工作得很好，但最後一行似乎從未執行。我可以刪除原始文件，但該文件從來沒有在新的臨時文件回原來的文件名重命名......

我敢肯定它的東西很容易，但是，我不知道爲什麼它不工作。誰能幫忙？

# 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

試試這個

# 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)