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dow.rb

This Ruby code snippet demonstrates how to create a frozen array of strings in Ruby. The code creates an array called DOW_JP and initializes it with the seven days of the week in Japanese, using the %w[] syntax. It then uses the map() method to freeze each element of the array, and finally freezes the entire array itself.

Note: Frozen objects are objects that cannot be modified after they have been created. In this case, the array DOW_JP is frozen so that it can’t be changed or reassigned.

Ruby code snippet

DOW_JP = %w[日 月 火 水 木 金 土].map(&:freeze).freeze
#=> ["日", "月", "火", "水", "木", "金", "土"]

Executed with Ruby 3.4.4.