Re^2: Scanning multiple files from Snort rules one by one and extracting a particular part to another file

Hi, thanks for guiding !! I'm trying to learn this language but I'm always confused in this part. for my $rulefile (@rulefiles){ What exactly is the difference betweeen $rulefile and @rulefiles? I understand that @rulefiles is an array and is actually referring to the assortment of all the ".rule" file in the folder. but what purpose is $rulefile serving?

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Re^3: Scanning multiple files from Snort rules one by one and extracting a particular part to another file - File Handling by Laurent_R (Canon) on Jul 23, 2015 at 07:47 UTC
Hi, `@rulefiles` is an array containing the names of the *.rule" files in the folder. `for my $rulefile (@rulefiles) { # ... }` [download] is a loop that goes over each of the items (file names) in the `@rulefiles` array, one after the other, assigns it to the `$rulefile` variable, so that each of the items can be manipulated with the `$rulefile` variable name within the body of the loop. This is a simple example of a Perl one-liner using a similar construct: `$ perl -e 'for my $i (1, 4, 3, 2) { print "$i\n"; }' 1 4 3 2 $` [download] In this example, the `$i` variable takes successively each value of the list `(1, 4, 3, 2)` and the body of the loop simply prints `$i` to the screen.	[reply] [d/l] [select]

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Re^3: Scanning multiple files from Snort rules one by one and extracting a particular part to another file - File Handling
by Laurent_R (Canon) on Jul 23, 2015 at 07:47 UTC

@rulefiles is an array containing the names of the *.rule" files in the folder.

for my $rulefile (@rulefiles) {
    # ...
}
[download]

@rulefiles

$rulefile

This is a simple example of a Perl one-liner using a similar construct:

$  perl -e 'for my $i (1, 4, 3, 2) {
     print "$i\n";
 }'
1
4
3
2

$
[download]

$i

(1, 4, 3, 2)

$i

[reply]
[d/l]
[select]