Given a string of a mobile phone number, I need to make sure that the given string only contains digits 0-9, (,),+,-,x, and space. How can I do it in Ruby?
Given a string of a mobile phone number, I need to make sure that
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Given a string of a mobile phone number, I need to make sure that the given string only contains digits 0-9, (,),+,-,x, and space. How can I do it in Ruby?
Use:
E.g.: