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Re: Filename Template

by larsen (Parson)
on Aug 07, 2003 at 14:50 UTC ( #281913=note: print w/replies, xml ) Need Help??


in reply to Filename Template

... the template bit is. This config value should match files that have 4 alpha characters, then a -, then 8 numeric characters. ...
If you say regular expression instead of template maybe you'll find the light.

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A few definitions (was Re2: Filename Template)
by dragonchild (Archbishop) on Aug 07, 2003 at 15:23 UTC
    To expand on this, general usage of the following terms could be defined as follows:
    • Template: A format used for describing output
    • Format: A way of abstractly expressing how something should look, as opposed to what the content should be
    • Regular Expression: A way of defining some set of matching criteria, often used for limiting or parsing input
    • Mask: A format used for constraining input
    Hopefully, that helps!

    ------
    We are the carpenters and bricklayers of the Information Age.

    The idea is a little like C++ templates, except not quite so brain-meltingly complicated. -- TheDamian, Exegesis 6

    Please remember that I'm crufty and crochety. All opinions are purely mine and all code is untested, unless otherwise specified.

      Yes. And it offers me a way to expand my previous answer. You say that a template is "a format used for describing output". I'll go further, saying that a template generates a language (i.e. a set of strings). On the other hand a regular expression denotes a language, then is usable to recognize strings that belong or not to a set. Since the original question asked for a way to recognize strings in a set, I suggested to change terminology in order to be conducted to the right abstraction that Perl provides.

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