Re^7: Quicker way to do this IF statement 1-5

well nothing is personal with it. its just a normal view if other people would see that kind of codes. okey then, the lacking with this regex:

if ($b=~/^[1-5]\z/) {
   print "\$b has to be a number and is either 1, 2, 3, 4, or 5.\n";
}
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is what if $b contains:

my $b = "     5    ";
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my $b = "   \t\t  1  \t  ";
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then it wont print the message because of the whitespace. but i prefer to that codes (just add a code before "if"):

$b =~ s/\s+//g; #additional code
if ($b=~/^[1-5]\z/) {
   print "\$b has to be a number and is either 1, 2, 3, 4, or 5.\n";
}
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Re^8: Quicker way to do this IF statement 1-5 by blazar (Canon) on May 21, 2007 at 20:43 UTC
is what if $b contains: `my $b = " 5 ";` [download] Well, the OP explicity stated that she "would like to make sure `$b` has to be a digit and the digit has to be from 1 to 5". Indeed if you have different requirements and prefer to sanitize the input by removing whitespace, then you can happily do so. Your additional s is perfectly fine, in fact.	[reply] [d/l] [select]