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percent_expression.rb

This Ruby code snippet demonstrates string and symbol array creation using different shortcuts.

• %w() creates an array of strings by splitting the input string at whitespace. String interpolation (#{str}) is not evaluated within %w.
• %W() is similar to %w(), but does evaluate string interpolation, creating an array of strings.
• %i() creates an array of symbols. String interpolation is treated literally.
• %I() creates an array of symbols and does evaluate string interpolation, creating symbols from the evaluated strings.

Ruby code snippet

str='ruby'
#=> "ruby"

%w(a b c "#{str}")
#=> ["a", "b", "c", "\"\#{str}\""]
%W(a b c "#{str}")
#=> ["a", "b", "c", "\"ruby\""]

%i(a b c "#{str}")
#=> [:a, :b, :c, :"\"\#{str}\""]
%I(a b c "#{str}")
#=> [:a, :b, :c, :"\"ruby\""]

Executed with Ruby 3.4.5.