CS160

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The flashcards below were created by user Anonymous on FreezingBlue Flashcards.


  1. *
    anything, including nothing

    Example A*

    Capital A followed by 0 or more characters
  2. ?
    a single character

    Example: ???

    exactly three characters long
  3. [ ]
    a single character that is one of the characters enclosed in the brackets

    Example [abc]

    a single character that is either a or b or c
  4. [ - ]
    a single character whose value is greater than or equal to 'a' and less than or equal to z (i.e. a lower case character)

    example [a-z]

    Note: uppercase characters have consecutive values, as do lowercase characters, as do digits. However [a-Z] does not do what you want. Use [a-zA-Z] instead.
  5. a character class enclosed inĀ  [ ]
    a single character that is a member of that character class

    Example: [[:alpha:]]

    the character class is alpha. it is indicated by [:alpha:]. the inner brackets indicate the character class. The out brackets indicate the character set (that is a single character) Both sets of brackets are needed.

    Classes include: alpha, upper, lower, digit, alnum, blank, space(whitespace), punct
  6. Classes
    alpha, upper, lower, digit, alnum, blank, space(whitespace), punct
  7. [!a-z]
    ! negates the character set. a single character that is not a member of the set

    [!a-z] a single character whose value is not (greater than or equal to 'a' and less than or equal to 'z') Thus, any character that is not lowercase.

Card Set Information

Author:
Anonymous
ID:
315557
Filename:
CS160
Updated:
2016-02-08 19:14:02
Tags:
wildscards cs160a linux unix commands terminal commandline computer science compsci computers
Folders:

Description:
Wildcard commands from the Wildcards sheets in cs160a taught at City College of San Francisco.
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