From: sto.mar@... Date: 2017-03-13T20:48:24+00:00 Subject: [ruby-core:80145] [Ruby trunk Bug#13312] String#casecmp raises TypeError instead of returning nil Issue #13312 has been reported by stomar (Marcus Stollsteimer). ---------------------------------------- Bug #13312: String#casecmp raises TypeError instead of returning nil https://bugs.ruby-lang.org/issues/13312 * Author: stomar (Marcus Stollsteimer) * Status: Open * Priority: Normal * Assignee: * Target version: * ruby -v: r57964 * Backport: 2.2: UNKNOWN, 2.3: UNKNOWN, 2.4: UNKNOWN ---------------------------------------- String#casecmp and String#casecmp? behave differently from other comparison methods: for incomparable values they raise a TypeError, while Symbol#{casecmp,casecmp?} and the #<=> methods (also for other classes) return `nil`: ``` "abc" <=> 1 # => nil "abc".casecmp 1 # TypeError: no implicit conversion of Integer into String "abc".casecmp? 1 # TypeError: no implicit conversion of Integer into String :abc <=> 1 # => nil :abc.casecmp 1 # => nil :abc.casecmp? 1 # => nil 1 <=> Time.now # => nil [] <=> :foo # => nil ``` This is surprising, since String#casecmp is essentially a case-insensitive version of String#<=>, which seems to imply that they should behave in a similar way. Also, the different behavior for String and Symbol might be an indication that this is a bug and not intentional. -- https://bugs.ruby-lang.org/ Unsubscribe: