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  • 193 Valid Phone Numbers

    Given a text file file.txt that contains list of phone numbers (one per line), write a one liner bash script to print all valid phone numbers.

    You may assume that a valid phone number must appear in one of the following two formats: (xxx) xxx-xxxx or xxx-xxx-xxxx. (x means a digit)

    You may also assume each line in the text file must not contain leading or trailing white spaces.

    Example:

    Assume that file.txt has the following content:

    987-123-4567
    123 456 7890
    (123) 456-7890
    

    Your script should output the following valid phone numbers:

    987-123-4567
    (123) 456-7890

    在文本中找出(xxx) xxx-xxxx or xxx-xxx-xxxx 这样的字符串

    grep -e '^[0-9]{3}-[0-9]{3}-[0-9]{4}$' -e '^([0-9]{3}) [0-9]{3}-[0-9]{4}$' file.txt
     
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  • 原文地址:https://www.cnblogs.com/mengchunchen/p/9305776.html
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