如何将CSV通过管道传入Ruby脚本？求正确代码实现

First up, let's fix the command syntax—your current command my_file.csv | my_ruby_script.rb doesn't work because you're trying to pipe the filename itself, not the actual content of the CSV file. Here are two correct ways to pass the CSV data to your script:

• Using cat with a pipe:

  cat my_file.csv | ./my_ruby_script.rb
  

• Using input redirection (this is more efficient and avoids spawning an extra cat process):

  ./my_ruby_script.rb < my_file.csv
  

Next, make sure your Ruby script has execute permissions. Run this command once to mark it as executable:

chmod +x my_ruby_script.rb

Your Ruby code is actually almost right! Let's confirm it works with the fixed command. Here's the code again with a small robustness note:

#!/usr/bin/env ruby
require 'csv'
require 'awesome_print'

# Read input from STDIN and parse CSV with headers enabled
CSV.parse(STDIN.read, headers: true) do |row|
  ap row.to_hash
end

If it's still not running, check these common issues:

• Ensure your CSV file has valid, properly formatted headers (no missing or malformed entries).
• Make sure the awesome_print gem is installed (run gem install awesome_print if you haven't already).
• Verify Ruby is installed and accessible in your system's PATH.

For testing, try using a simple sample CSV first to rule out formatting problems:

name,age,email
Alice,30,alice@example.com
Bob,25,bob@example.com

内容的提问来源于stack exchange，提问作者blackstone8