----- Original Message -----
From: "Ken Foskey" <[EMAIL PROTECTED]>
Newsgroups: perl.beginners
To: "beginners perl" <beginners@perl.org>
Sent: Monday, August 20, 2007 10:47 AM
Subject: modification
I have a piece of code that I am assured works and I cannot see why it
would. Code is supposed to force undefined, zero and all space to
numeric zero to stop printf being undefined.
foreach my $value (@array) {
if( ! $value or $value = " " ) {
$value = 0;
}
}
Will this actually work, or as I suspect do nothing because $value is a
copy.
Hello Ken
In a for(or foreach) loop, if $value is changed, the actual array element is
changed;
Best described here:
http://perldoc.perl.org/perlsyn.html#Foreach-Loops-for-foreach
Chris
The root cause of the problem is that the array is read from a file with
a simple substr
$array[0] = substr( $_, 256, 6 );
Despite documented standards some values are simply filled with blanks.
Then rebuilt with a printf "%06d", $array[0]; and this causes a non
numeric warning.
Is there a 'better' way to do this.
--
Ken Foskey
FOSS developer
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