Mallik wrote:
>
> I have to compare numeric values as below
>
> if (($segsep == 13) || ($segsep == 10) || ($segsep == 0))
>
> Can I use the reg exp as below
>
> if ($segsep =~ /^(13|10|0)$/)
>
> My question is, is it adviceable to use reg exp for numeric values (entire
> value).
> If yes, why?
> If not, why?
No. Because it's slower, and because several different strings can have
the same numeric value.
for ( qw/ 12 00012 1.2E1 / ) {
print "Numeric match for $_\n" if $_ == 12;
}
succeeds in all three cases, but clearly
for ( qw/ 12 00012 1.2E1 / ) {
print "Regexp match for $_\n" if /^12$/;
}
would match for only the first value.
If you're looking for a more concise way of matching any of a list of numbers
then try
if ( grep $segsep == $_, 13, 10, 0 )
HTH,
Rob
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