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dow.rb

This Ruby code snippet demonstrates the creation of a frozen array containing the Japanese abbreviations for the days of the week. %w[...] creates an array of strings. .map(&:freeze) iterates through the array and freezes each string element (making it immutable). Finally, .freeze freezes the entire array itself, preventing modification. This improves performance and prevents accidental changes to the day names.

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 3.4.5.