7 More Discussions You Might Find Interesting
1. UNIX for Beginners Questions & Answers
I am working on a script to get the final total size and so far have the following and wondering if this can be improved.
# Compare the desired size of each lvm to the standard size. If it is desired is larger than calculate the difference and keep that value as the amount to add to that LVM. ... (5 Replies)
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2. What is on Your Mind?
This came to my attention very recently...
I have put it here as a fun item not related to UNIX in any way...
Chudnovsky algorithm - Wikipedia
WOW!
And a great, light hearted 16 minute video about it:
Calculating π by hand: the Chudnovsky algorithm - YouTube
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3. Shell Programming and Scripting
Hi All,
I want to send an email if the time difference from previous mail sent is more than or equal to 30 mins.
I have written below code and it's working fine.
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I don't the following why ?:confused:
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5. Shell Programming and Scripting
Hi,
I'm trying to create an XML sitemap of our dynamic ecommerce sites SEO Friendly URLs and am trying to create the initial page listing.
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... (2 Replies)
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Hi,
My text file looks like this...
I am not sure if it is tab separated or space separated.
SHANTNU 101 12:40:00 AM 04:53:00 AM 219:40:00 04:23:00 AM 10 12:01:00 AM 296:18 1:55
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7. UNIX for Dummies Questions & Answers
I need to add an average field to a file. I can create it in an on-screen report and it does what I need using the awk command but I can't get it to create a new file with the additional field. Here's what I'm working with:
file layout: id:lastname:firstname:grade1:grade2:grade3:grade4
I... (1 Reply)
Discussion started by: atchleykl
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English(3pm) Perl Programmers Reference Guide English(3pm)
NAME
English - use nice English (or awk) names for ugly punctuation variables
SYNOPSIS
use English;
use English qw( -no_match_vars ) ; # Avoids regex performance penalty
# in perl 5.16 and earlier
...
if ($ERRNO =~ /denied/) { ... }
DESCRIPTION
This module provides aliases for the built-in variables whose names no one seems to like to read. Variables with side-effects which get
triggered just by accessing them (like $0) will still be affected.
For those variables that have an awk version, both long and short English alternatives are provided. For example, the $/ variable can be
referred to either $RS or $INPUT_RECORD_SEPARATOR if you are using the English module.
See perlvar for a complete list of these.
PERFORMANCE
NOTE: This was fixed in perl 5.20. Mentioning these three variables no longer makes a speed difference. This section still applies if
your code is to run on perl 5.18 or earlier.
This module can provoke sizeable inefficiencies for regular expressions, due to unfortunate implementation details. If performance matters
in your application and you don't need $PREMATCH, $MATCH, or $POSTMATCH, try doing
use English qw( -no_match_vars ) ;
. It is especially important to do this in modules to avoid penalizing all applications which use them.
perl v5.18.2 2014-01-06 English(3pm)