Ruby On Rails perguntas e respostas de entrevista
Question: What is the convention using ‘!’ at the end of method name?Answer:The ! indicates that the method is about to change the object itself. Here’s an example: foo = "A TEST STRING" # a string called foo foo.downcase! # modifies foo permanently a test string puts foo # prints modified foo a test string Similarly if you did not want the object to be changed you could have something simple like: foo2 = "A 2nd Test String" # a string called foo foo2.downcase # modifies foo temporarily a 2nd test string puts foo2 nbsp; # prints original foo A 2nd Test String |
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