What is the `dummy?` property for an encoding in Ruby?

Overview

The dummy? property of an encoding in Ruby returns true if an encoding is a dummy. An encoding is a dummy if the character handling is not properly implemented.

Syntax

Encoding::encoding.dummy?

Return value

A Boolean value is returned. If the encoding is dummy, true is returned. Otherwise, false is returned.

Code

# check for some dummy encodings
puts "#{Encoding::UTF_8.dummy?}"        # false
puts "#{Encoding::UTF_7.dummy?}"        # true
puts "#{Encoding::UTF_16.dummy?}"       # true
puts "#{Encoding::ISO_8859_1.dummy?}"   # false
puts "#{Encoding::Windows_1250.dummy?}" # false

Explanation

  • Line 2-6: We check if some encodings are dummies using the dummy? property of an encoding instance. Then, we print the result to the console.

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