Re: simple array question


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Re: simple array question

by philipbailey (Curate)

on Jan 03, 2011 at 03:22 UTC ( [id://880122]=note: print w/replies, xml )

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in reply to simple array question

It seems that you are trying to assign a list to array @compass. Lists are surrounded by brackets, or parentheses if you prefer that term: (). Instead, you have used braces, which in this case create a reference to an anonymous hash, hence the warning messages.

So you need something more like this:

#!/usr/bin/perl

use strict;
use warnings;

my @compass = (
    ["NW", "N", "NE"],
    ["W", "center", "E"],
    ["SW", "S", "SE"],
);

print $compass[0]->[1];
[download]

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Re^2: simple array question by chromatic (Archbishop) on Jan 03, 2011 at 04:37 UTC
Lists are surrounded by brackets.... Not rvalue lists! Commas, not parentheses, produce literal rvalue lists. The three array references in this variant of that code are a list just as much as in the original version: `my @compass = ["NW", "N", "NE"], ["W", "center", "E"], ["SW", "S", "SE"], ;` [download] The difference between the two examples is the precedence of the assignment operator compared to the precedence of the comma operators.	[reply] [d/l]
Re^2: simple array question by tw (Acolyte) on Jan 03, 2011 at 03:40 UTC
thanks greatly that worked! it is nice to have some help when starting, may have been a while before I finally got it. seems that some code has { or [ also is that a typo or a perl version thing or OS thing or am I still missing something? thanks again	[reply]

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