EPrints Technical Mailing List Archive

See the EPrints wiki for instructions on how to join this mailing list and related information.

Message: #00837

< Previous (by date) | Next (by date) > | < Previous (in thread) | Next (in thread) > | Messages - Most Recent First | Threads - Most Recent First

[EP-tech] Re: Random question: Eprint core fields

I agree. I perl you can have an array, but [0] return error. If you cicle on it, you get the results. 

You can try it with $eprint->get_value( 'creators' )[0] <- does not work

returning $eprint->get_value( 'creators' ) gives an ARRAY *hex number*

foreach my $c ( @{$creators} )

works.

I don't know why :-)


Il 04/07/2012 16:57, John Salter ha scritto:

It was more the coding-standards inconsistencies I was thinking about (hence the pedant hat).

For you and I it doesn't matter. To someone picking up eprints, and perl as a new language, it could be confusing.

-----Original Message-----
From: eprints-tech-bounces@ecs.soton.ac.uk [mailto:eprints-tech-bounces@ecs.soton.ac.uk] On Behalf Of Sebastien Francois
Sent: 04 July 2012 15:45
To: eprints-tech@ecs.soton.ac.uk
Subject: [EP-tech] Re: Random question: Eprint core fields

Single quotes won't extrapolate a variable (and characters such as \n,
\r) while double quotes will:

my $var1 = 'hello';
my $var2 = '$var1 world';
my $var3 = "$var1 world";

print $var2;    # will print<$var1 world>
print $var3;    # will print<hello world>

Seb.

On 04/07/12 15:36, Ian Stuart wrote:

On 04/07/12 11:49, John Salter wrote:


Also (if I put my pedant hat on, so feel free to ignore!), there's inconsistent use of quotes in that file:
{ name=>"contact_email", type=>"email", required=>0, can_clone=>0 },
VS.
{ 'name' =>   'sword_depositor', 'type' =>   'itemref', datasetid=>"user" },

Perl knows that hash keys must be scalars, therefore assumes quotes.
Perl hash keys can be numeric scalars or string scalars, perl doesn't care.

I also notice variation in the use of quotes within the same
declaration, and with the use of single- verses double-quotes on values :)

Just goes to show how rich and helpful Perl is.... by not falling over
on the inconsequentials ;-)

*** Options: http://mailman.ecs.soton.ac.uk/mailman/listinfo/eprints-tech
*** Archive: http://www.eprints.org/tech.php/
*** EPrints community wiki: http://wiki.eprints.org/

*** Options: http://mailman.ecs.soton.ac.uk/mailman/listinfo/eprints-tech
*** Archive: http://www.eprints.org/tech.php/
*** EPrints community wiki: http://wiki.eprints.org/