Re: "42" ~~ "42.0" is false in 5.10

IMHO they should be compared as numbers but they are compared as strings

Well ... they *are* both strings ... and you are doing nothing that dictates that those strings should be numified. The behaviour seems totally reasonable to me.

OTOH, "42" * 1 ~~ "42.0" * 1 should (and does) evaluate as true - because, in this instance, something *is* being done to numify the strings.

Cheers,
Rob

Comment on Re: "42" ~~ "42.0" is false in 5.10 Download Code

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Re^2: "42" ~~ "42.0" is false in 5.10
by tomfahle (Priest) on Jan 24, 2008 at 17:09 UTC

Hi,

To me it looks right:

If it looks like a string, it will be treated as string.

Here's a small programm to test the new ~~ Operator.

use strict;
use warnings;
use 5.010;


## No quotes
&test_smartmatch(42, 42);
# yields 42 smartmatches 42

&test_smartmatch(42,42.0);
# yields 42 smartmatches 42

## Single Quotes
&test_smartmatch(42,'42.0');
# yields 42 smartmatches 42.0 

&test_smartmatch('42','42.0');
# yields 42 doesn't smartmatch 42.0

## Double Quotes
&test_smartmatch("42","42.0");
# yields 42 doesn't smartmatch 42.0


###########################################################
sub test_smartmatch {
    my $lhs = shift @_;  # Left Hand Side (LHS)
    my $rhs = shift @_;  # Right Hand Side (RHS)    
    if ( $lhs ~~ $rhs ) {
        say "$lhs smartmatches $rhs";        
    } else {
        say "$lhs doesn't smartmatch $rhs";
    }
} ##
###########################################################
__END__
[download]

Just my 2 cents.

Hope this helps.

[reply]
[d/l]


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