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21 lines
725 B
Plaintext
21 lines
725 B
Plaintext
Returns a new string containing the downcased characters in +self+:
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'HELLO'.downcase # => "hello"
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'STRAẞE'.downcase # => "straße"
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'ПРИВЕТ'.downcase # => "привет"
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'RubyGems.org'.downcase # => "rubygems.org"
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Some characters (and some character sets) do not have upcase and downcase versions;
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see {Case Mapping}[rdoc-ref:case_mapping.rdoc]:
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s = '1, 2, 3, ...'
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s.downcase == s # => true
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s = 'こんにちは'
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s.downcase == s # => true
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The casing is affected by the given +mapping+,
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which may be +:ascii+, +:fold+, or +:turkic+;
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see {Case Mappings}[rdoc-ref:case_mapping.rdoc@Case+Mappings].
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Related: see {Converting to New String}[rdoc-ref:String@Converting+to+New+String].
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