Re: HoA building

M. Lewis wrote:

John W. Krahn wrote:
M. Lewis wrote:

my ($prod, $flavor) = split /\s/, $ln, 2;

You probably should use ' ' instead of /\s/ as the first argument to
split:

my ($prod, $flavor) = split ' ', $ln, 2;

Ok, but why? Are they not the same?

No.

$ perl -le'
my $ln = " one two three four ";
print map " *$_* ", split /\s/, $ln, 2;
print map " *$_* ", split " ", $ln, 2;
'
** * one two three four *
*one* *two three four *

$ perl -le'
my $ln = "one two three four ";
print map " *$_* ", split /\s/, $ln, 2;
print map " *$_* ", split " ", $ln, 2;
'
*one* * two three four *
*one* *two three four *


/\s/ matches a single whitespace character, ' ' matches one or more whitespace
characters.




John
--
Perl isn't a toolbox, but a small machine shop where you can special-order
certain sorts of tools at low cost and in short order. -- Larry Wall
.

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