On Mon, Feb 8, 2010 at 9:00 PM, 7 <7stud.7s...@gmail.com> wrote:
> On Mon, Feb 8, 2010 at 6:19 PM, Uri Guttman <u...@stemsystems.com> wrote:
>
>> >>>>> "7" == 7 <7stud.7s...@gmail.com> writes:
>>
>> 7> if (defined $var && ($var eq '' || $var eq '0')) {
>>
>> 7> #code
>>
>> 7> }
>>
>> 7> to handle cases where $var = undef. undef acts like it is a blank
>> 7> string when used as a string.
>>
>> blah..
>>
>> unless( $var ) {
>>
>> is all you need for that situation. you are already testing three of the
>> four allowed false values. and the numeric 0 would be covered under the
>> eq '0' test anyhow.
>>
>> newbies should be taught perl's boolean false values early on.
>>
>
>
> Because unless and until statements are harder to maintain, NO ONE should
> use them--least of all beginners.
>
Because unless and until statements are harder to *read and maintain*, NO
ONE should use them--least of all beginners.
