RE: Confusion About A Little Piece Of Code
- From: PRAKASH P <P.Prakash@xxxxxxx>
- To: "programmingblind@xxxxxxxxxxxxx" <programmingblind@xxxxxxxxxxxxx>
- Date: Thu, 12 May 2011 13:37:43 +0000
Normally when you read from stdin kind of input where end of line markers
are used to end the current input, the new line markers are not read in to
the field. So experiment before you begin "chomping: on it unnecessarily.
This can get expensive depending on the size of the array.
Prakash
From: programmingblind-bounce@xxxxxxxxxxxxx
[mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Humberto Rodriguez
Sent: Wednesday, May 11, 2011 8:44 PM
To: programmingblind@xxxxxxxxxxxxx
Subject: Re: Confusion About A Little Piece Of Code
Hello Jim:
I am certainly no expert, but in my experience, you should always use chomp
when extracting the values of the elements of an array. At any rate, it
couldn't hurt, because it will remove only the new line character or \n at the
end of the line, if any.
Humberto
----- Original Message -----
From: Homme, James<mailto:james.homme@xxxxxxxxxxxx>
To: programmingblind@xxxxxxxxxxxxx<mailto:programmingblind@xxxxxxxxxxxxx>
Sent: Wednesday, May 11, 2011 10:11 AM
Subject: Perl: Confusion About A Little Piece Of Code
Hi,
Maybe I'm not understanding this. Here is some code.
print "Enter some numbers on separate lines: ";
my $user_total = total(<STDIN>);
I'm pretending that there's a subroutine that adds up the numbers.
I'm thinking that I would enter the numbers from the keyboard on separate
lines, and when I'm done, I'd press the key combination that signals end of
input.
When the program gets the array, I'm thinking that each line would have a new
line on the end of it.
Here's where the question comes in.
Would the subroutine need to use the chomp function to get rid of the new lines
before it adds up the numbers, or would it be happy with the line endings?
Thanks.
Jim
Jim Homme,
Usability Services,
Phone: 412-544-1810.
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