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Full Discussion: Perl question regarding [ ]
Top Forums Shell Programming and Scripting Perl question regarding [ ] Post 302124460 by hankooknara on Sunday 1st of July 2007 02:03:46 AM
Old 07-01-2007
Perl question regarding [ ]
Below program, I do not get why item I am looking for is [6], instead of [5].
When I do $#text, i get the right value for $value1, but when I do [5], i get somsething4, instead of
somsethingxxxxxxxxxxxxxxxxxxx(which is what I am looking for.

when I do [0], I get empty.. why? what did I do wrong? can you please help?

thanks.

#!/usr/bin/perl
my $value1;

while(<>)
{
my $line = $_;
(@text) = split(/\s+/,$line);
if($line =~ /Time/)
{
#$value1 = $text[6];
$value1 = $text[$#text];


Top of the file below
something somsething somsething something4 somethingxxxxxxxxxxxxx
 

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LEARN ABOUT REDHAT

math

math(n) 							 Tcl Math Library							   math(n)

NAME

       math - Tcl Math Library

SYNOPSIS

       package require Tcl 8.2

       package require math ?1.2?

       ::math::cov value value ?value ...?

       ::math::integrate list of xy value pairs

       ::math::fibonacci n

       ::math::max value ?value ...?

       ::math::mean value ?value ...?

       ::math::min value ?value ...?

       ::math::prod value ?value ...?

       ::math::random ?value1? ?value2?

       ::math::sigma value value ?value ...?

       ::math::stats value value ?value ...?

       ::math::sum value ?value ...?

DESCRIPTION

       The math package provides utility math functions.

COMMANDS

       ::math::cov value value ?value ...?
	      Return the coefficient of variation expressed as percent of two or more numeric values.

       ::math::integrate list of xy value pairs
	      Return the area under a "curve" defined by a set of x,y pairs and the error bound as a list.

       ::math::fibonacci n
	      Return the n'th Fibonacci number.

       ::math::max value ?value ...?
	      Return the maximum of one or more numeric values.

       ::math::mean value ?value ...?
	      Return the mean, or "average" of one or more numeric values.

       ::math::min value ?value ...?
	      Return the minimum of one or more numeric values.

       ::math::prod value ?value ...?
	      Return the product of one or more numeric values.

       ::math::random ?value1? ?value2?
	      Return a random number.  If no arguments are given, the number is a floating point value between 0 and 1.  If one argument is given,
	      the number is an integer value between 0 and value1.  If two arguments are given, the number is an integer value between value1  and
	      value2.

       ::math::sigma value value ?value ...?
	      Return the population standard deviation of two or more numeric values.

       ::math::stats value value ?value ...?
	      Return the mean, standard deviation, and coefficient of variation as percent as a list.

       ::math::sum value ?value ...?
	      Return the sum of one or more numeric values.

KEYWORDS

       math, statistics

math									4.2								   math(n)
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