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DIR and regular expressions

Discussion in 'Support' started by vefatica, Jul 19, 2009.

  1. vefatica

    Joined:
    May 20, 2008
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    The regular expressing matching in DIR is **substring** matching, unlike wildcard matching.

    And the matching is case-insensitive even though the file system is case-retentive and the regex is case-sensitive.

    This example shows both.

    Code:
    v:\> dir /b ::"c.*\.bat"
    a b c.bat
    a b c.batx
    c.batx
    
    v:\> dir /b ::"c.*\.BAT"
    a b c.bat
    a b c.batx
    c.batx
    It would be nice if both changed in v11. IMHO the default should be matching on the whole name (like wildcards). I know I can force it with "^" and "$" but I think whole-name-matching is what's usually wanted (and the user can cforce substring matching in the regex if he wants). And since the file system (NTFS at least) is case-sensitive, allowing case-sensitive regex matching would simply give more power to the user; the user could defeat it in the regex.
     

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