|Perl: the Markov chain saw|
Re: Help with arraysby Kenosis (Curate)
|on Sep 22, 2012 at 06:01 UTC||Need Help??|
What I am having trouble understanding is how to make an array with an uknown length?
It's common to have to work with an array without knowing its length--in Perl or other computer languages. Consider the following:
First, notice the following at the top of the script:
Always have these, as they'll preemptively catch issues in your scripts, potentially saving your hours of headaches. (Omit them, however, if you prefer these headaches... :)
All the Examples could be working with an array of an unknown length. It just so happens that we know the length, since we've initialized it.
Example 1 iterates through each element of @array, assigning $number an each element's value that's then printed within the loop. Examples 2 & 3 show the number of elements in @array:
Example 4 shows a more traditional C-style for loop, and produces the same output as Example 1:
Example 5 shows one way to get the sum of the numbers in @array, and here's its output:
Perhaps the above will assist you with how to "Find the average of the numbers in an array (@nums) of unknown length."
Hope this helps!