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Re^5: Help with arrays

by 2teez (Priest)
on Sep 22, 2012 at 05:52 UTC ( #995047=note: print w/ replies, xml ) Need Help??


in reply to Re^4: Help with arrays
in thread Help with arrays

Anonymous Monk:
An exercise of an array of "unknown length" would be to populate an array from a file of unknown lines (thus number of array elements) with each number listed on a line by itself.

In the light of the above statement, let assume, your file with unknown length is given as below __DATA__, consider the codes below:

use warnings; use strict; my $sum = 0; my @nums; # same as my @nums = (); while (<DATA>) { chomp; push @nums, $_; } $sum += $_ for @nums; my $size = @nums; my $average = $sum / $size; print $average, $/; __DATA__ 1 2 3 4 5 6

NOTE: that @nums = () is assigning an empty list to the variable array @nums, so the array is empty. So, $size will be 0.

You might what to check the following Up:
push, pop, shift, unshift

If you tell me, I'll forget.
If you show me, I'll remember.
if you involve me, I'll understand.
--- Author unknown to me


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