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Re^4: Sorting an array of hashes

by BKB (Novice)
on Mar 27, 2008 at 10:46 UTC ( [id://676685]=note: print w/replies, xml ) Need Help??


in reply to Re^3: Sorting an array of hashes
in thread Sorting an array of hashes

Running the previous version of code: 
perl arraydelete.pl
Use of uninitialized value within @x in print at arraydelete.pl line 6
+.
1245

[download]
Modified as follows using "exists": 
#! perl
use warnings;
use strict;
my @x = (1,2,3,4,5);
delete $x[2];
for (0..4) { print $x[$_] if exists ($x[$_]) }

[download]
Run it to produce: 
perl arraydelete.pl
1245

[download]

Replies are listed 'Best First'.
Re^5: Sorting an array of hashes
by stiller (Friar) on Mar 27, 2008 at 10:57 UTC
    Update: I didn't read your post carefully enough

    You get the result you want, but the semantic is not what you indicate by using exists so I'd rather use defined in that case. 

    #! perl
use warnings;
use strict;
my @x = (1,2,3,4,5);
delete $x[2];
for (0..4) { print $x[$_] }

    [download]
    Run it to produce: 
    Use of uninitialized value in print at checkifexists.pl line 6.
1245

    [download]
    So, the element exists, but it's value is undefined.
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