Re: REGEXP removing - il- - -b-f and - il- - - - f

I will answer and ask all questions in one email! k.

> $!";
> 5> my @fa =();
> 6> my @ha =();
> 7> my $i =0;
> 8> foreach (<V4>) {

> Is there any good reason to slurp the entire file into memory?

What would you suggest? I want to read the entire file via a filehandle.
I have plenty of system memory, therefore why not?



> You are using the match in a boolean context so the /g option makes no
sense.
> 15> #$fa[$i++] = +(split)[5,6,7] if (m/f01(\d+)/gi );

If I do not use the /g modifier then it will not slurp the entire file or
all instances of F01, I tried it without /g and it did not work.


>The value of $#fa is not the number of elements in the array, for that you
>want to use the array in scalar context:

>print "Now printing array count \t", scalar @fa, "\n";

>Or:

>print "Now printing array count \t" . @fa . "\n";


In my Learning Perl 2nd edition and Programming Perl 3rd edition, no where
does it say use
scaler @fa to get the element count, rather it says use $#fa. Is there
something I am unaware of or was $# deprecated recently?

Why is scaler @fa better/more correct than $#fa?

I have been told that my @a = ( ); is more correct than my @a, but now I am
confused b/c others are telling me otherwise??? Personally, I like my @a =
( );
because it lets me know explicitly that this array is now initialized to 0
elements, plus its faster at compile time...KUDOS to John Kran!

>From Jupiter :

> > You do realize that the characters 'F', '0' and '1' are included in the
> character class \w which split() is removing? :-)

yeah I realized that typo too late :), I meant \s not \w but then plain
old my @tmp = split; is even better :)

But I thought spit by default separates on whitespace? And F, 0 and 1 are
indeed apart of char classes \w and \d?

Finally no one has answered my question what does (split)[-1] mean?


thank you!
derek


Derek B. Smith
OhioHealth IT
UNIX / TSM / EDM Teams





"John W. Krahn"
<krahnj@xxxxxxxxx
> To
Perl Beginners <beginners@xxxxxxxx>
04/27/2005 05:24 cc
PM
Subject
Re: REGEXP removing - il- - -b-f
and - il- - - - f










DBSMITH@xxxxxxxxxxxxxx wrote:
> yes I agree I was a little ambiguous... I was in a hurry. sorry. Anyway
> here is my updated code. and here is a sample output:
> My goal is to get all F01 which I am but I am having issues capturing all
> of these values into my array. When I run the I get the data I want to
see
> which is just the F01 column, but when I comment out line 14 and
uncomment
> line 15 and uncomment line 21 I see no data in the array???
> In the end I want the F01 column and the % column.

You only want the two columns, that looks simple enough:

while ( <V4> ) {
my ( $percent, $f01 ) = /(\d+%).*?(f01\d+)/i or next;
print "$percent $f01\n";
}


> 1 2005/01/20 15:39 17 2% -il-o-b- - - - - sg F01000
> 2 2005/01/20 15:53 14 1% -il-o-b----- sg F01001
> 3 2005/01/18 09:53 2 0% -il-o-b----- sg F01002
> 4 2005/02/04 16:41 196 100% -il-o-b----f sg F01003
> 5 2005/02/05 21:13 305 100% -il-o-b----f sg F01004
> 6 2005/02/28 22:47 180 100% -il-o-b----- sg F01005
> 13 2005/02/08 16:07 112 100% -il-o-b----f sg F01006
> 14 2005/02/09 21:56 122 100% -il-o-b----f sg F01007
> 15 2005/02/11 10:51 147 100% -il-o-b----f sg F01008
> 16 2005/02/13 11:35 193 100% -il-o-b----f sg F01009
> 17 2005/02/14 23:46 79 100% -il-o-b- - - -f sg F01010
>

<SNIP>
John
--
use Perl;
program
fulfillment

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