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write_file_with_open.rb

This Ruby code snippet demonstrates how to write a hash to a JSON file using the JSON module in Ruby. The code first creates a hash with one key-value pair, and then uses the File.open method to open a file named “input/json/file.json” for writing. It then passes the hash object to the JSON.dump method, which serializes the hash as JSON data and writes it to the file. The resulting file will contain the JSON representation of the hash object, which can be read back into a Ruby program using the JSON module’s load method.

Ruby code snippet

require 'json'
#=> true

hash = {:key => 'value'}
#=> {key: "value"}

File.open('input/json/file.json', 'w') {|f| JSON.dump(hash, f)}
#=> #<File:input/json/file.json (closed)>

Executed with Ruby 3.4.4.