Re: [MacPerl] Regular Expression Definition

[Brian McNett <brianmc@telebyte.net>]

Mark Yannuzzi, <myannuzzi@aya.yale.edu> wrote:

>I am trying to 'split' the following line:
>
><ASCII 10> YY,XX   BIN #  1-IDSXP   #  2-VGS1P   #  8-IGSO    # 10-VGF    \n
>          ^     ^^^   ^ ^^       ^^^ ^^       ^^^ ^^      ^^^^ ^      ^^^^
>where ^ = whitespace.  I need the line to be place into the array as follows:
>
>[YY,XX] [BIN] [#  1-IDSXP] [#  2-VGS1P] [#  8-IGSO] [# 10-VGF]
>                ^^           ^^           ^^          ^
>so that the numerical data lines that follow will correlate (array
>index-wise) with these headers.  I have tried various combos of /s, etc.,
>but the varying whitespaces are reeking havoc.  Sometimes, I will also
>end up with the fist element of the array containing the NULL character.
>
>Anyone's help would be greatly appreciated, I am new to Perl and have not
>mastered regular expressions yet...

Chapter 9 in MacPerl Power and Ease has some good info on using the /x 
modifier to allow your regex's to have extra whitespace and comments to 
make them clearer.  I've found this useful when developing a complicated 
regex. There's also some good info on this in the Camel book (second 
edition), which unfortunately I don't own.

It really sounds like what you want is a multi-dimensional array (or a 
multidimensional hash).  I'll leave that to other more capable sorts.


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