Contributed by dallok
on Nov 01, 2000 at 02:12 UTC
Q&A
> strings
Description: I want to compare what is in $ARGV[0] an array that I created from a file that contains single line entries.
This is what I have so far:
#!c:\perl\bin -w
use strict;
open downfile, '>f:\scripts\text\nodedown.txt':
print downfile "$ARGV[1] $ARGV[2] is Down on $ARGV[0].\n";
close downfile;
my $routers="F:/scripts/text/routers.txt";
open routers, $routers or die "cannot open $routers: $!\n";
my @lines = <routers>;
close routers;
my ($zero_arg, $first_arg, $sec_arg) = @ARGV[0..2];
if (grep {$zero_arg eq $ARGV[0]} @lines) {
system('f:\usr\ov\bin\nvecho.exe GOT IT');
}
exit 0;
Is there a better way to do this? Answer: compare what is in ARGV0 to a file contributed by Fastolfe Be aware that each element in @lines will have the trailing newline from the file. You probably want to chomp(@lines); before you compare it against anything.
In addition, your grep statement is non-sensical. See the documentation for it. If you want to loop through @lines and compare it against $ARGV[0] (why not $zero_arg?), you'll have to either explicitely set up a loop to do it, or modify your grep statement to compare against $_, which will iteratively contain each element in @lines in turn. | Answer: compare what is in ARGV0 to a file contributed by Ovid dallok: this appears to be at least the third time that you have asked a variation of this question. I think you would be better served posting this to the Seekers of Perl Wisdom section. Then, rather than post it three times (with little to no explanation), you could generate a running commentary where people ask "What are you talking about?" and you get a chance to clarify it, rather than repeatedly posting "non-questions" like the one above. |
Please (register and) log in if you wish to add an answer
Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
Read Where should I post X? if you're not absolutely sure you're posting in the right place.
Please read these before you post! —
Posts may use any of the Perl Monks Approved HTML tags:
- a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
|
For: |
|
Use: |
| & | | & |
| < | | < |
| > | | > |
| [ | | [ |
| ] | | ] |
Link using PerlMonks shortcuts! What shortcuts can I use for linking?
See Writeup Formatting Tips and other pages linked from there for more info.
|
Log In?
|
|
Chatterbox?
|
How do I use this? | Other CB clients
|
Other Users?
|
Others examining the Monastery: (2) As of 2021-02-25 01:41 GMT
|
Sections?
|
|
Information?
|
|
Find Nodes?
|
|
Leftovers?
|
|
Voting Booth?
|
No recent polls found
|
Notices?
|
|
|