Solved

getting amount of elements of perl default array

Posted on 2013-07-01
2
241 Views
Last Modified: 2013-07-01
Hi,

I can use $#array+1 to get the amount of elements in @array.

How about @_? Is it possible?

Thanks.
0
Comment
Question by:chainfear
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 
LVL 84

Assisted Solution

by:ozo
ozo earned 250 total points
ID: 39289883
$amount_of_elements = $#_+1;
#or
$amount_of_elements = @_;
0
 
LVL 26

Accepted Solution

by:
wilcoxon earned 250 total points
ID: 39290078
You can always use @var to get the number of elements in scalar context.  What ozo has given is correct (as usual).  A simple equivalent way to make it explicit is:
$amount_of_elements = scalar @_;

Open in new window


To get the last element in a list, you can do:
$last = $arr[$#arr];
# or
$last = $arr[@arr-1];
# or
$last = $arr[-1];

Open in new window

0

Featured Post

Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Many time we need to work with multiple files all together. If its windows system then we can use some GUI based editor to accomplish our task. But what if you are on putty or have only CLI(Command Line Interface) as an option to  edit your files. I…
Checking the Alert Log in AWS RDS Oracle can be a pain through their user interface.  I made a script to download the Alert Log, look for errors, and email me the trace files.  In this article I'll describe what I did and share my script.
Explain concepts important to validation of email addresses with regular expressions. Applies to most languages/tools that uses regular expressions. Consider email address RFCs: Look at HTML5 form input element (with type=email) regex pattern: T…
Six Sigma Control Plans

717 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question